| Message ID | 20180721115923.1389-7-ivan.khoronzhuk@linaro.org |
|---|---|
| State | New |
| Headers | show |
| Series | None | expand |
On Sat, Jul 21, 2018 at 02:59:23PM +0300, Ivan Khoronzhuk wrote: > This document describes MQPRIO and CBS Qdisc offload configuration > for cpsw driver based on examples. It potentially can be used in > audio video bridging (AVB) and time sensitive networking (TSN). > > Reviewed-by: Grygorii Strashko <grygorii.strashko@ti.com> > Signed-off-by: Ivan Khoronzhuk <ivan.khoronzhuk@linaro.org> > --- > Documentation/networking/ti-cpsw.txt | 540 +++++++++++++++++++++++++++ > 1 file changed, 540 insertions(+) > create mode 100644 Documentation/networking/ti-cpsw.txt > > diff --git a/Documentation/networking/ti-cpsw.txt b/Documentation/networking/ti-cpsw.txt > new file mode 100644 > index 000000000000..1e840346cae1 > --- /dev/null > +++ b/Documentation/networking/ti-cpsw.txt > @@ -0,0 +1,540 @@ > +* Texas Instruments CPSW ethernet driver > + > +Multiqueue & CBS & MQPRIO > +===================================================================== > +===================================================================== > + > +The cpsw has 3 CBS shapers for each external ports. This document > +describes MQPRIO and CBS Qdisc offload configuration for cpsw driver > +based on examples. It potentially can be used in audio video bridging > +(AVB) and time sensitive networking (TSN). > + > +The following examples was tested on AM572x EVM and BBB boards. > + > +Test setup > +========== > + > +Under consideration two examples with AM52xx EVM running cpsw driver > +in dual_emac mode. s/AM52xx/AM572x ? Also, there are more mentions of AM52xx, below. Thanks, Richard > + > +Several prerequisites: > +- TX queues must be rated starting from txq0 that has highest priority > +- Traffic classes are used starting from 0, that has highest priority > +- CBS shapers should be used with rated queues > +- The bandwidth for CBS shapers has to be set a little bit more then > + potential incoming rate, thus, rate of all incoming tx queues has > + to be a little less > +- Real rates can differ, due to discreetness > +- Map skb-priority to txq is not enough, also skb-priority to l2 prio > + map has to be created with ip or vconfig tool > +- Any l2/socket prio (0 - 7) for classes can be used, but for > + simplicity default values are used: 3 and 2 > +- only 2 classes tested: A and B, but checked and can work with more, > + maximum allowed 4, but only for 3 rate can be set. > + > +Test setup for examples > +======================= > + +-------------------------------+ > + |--+ | > + | | Workstation0 | > + |E | MAC 18:03:73:66:87:42 | > ++-----------------------------+ +--|t | | > +| | 1 | E | | |h |./tsn_listener -d \ | > +| Target board: | 0 | t |--+ |0 | 18:03:73:66:87:42 -i eth0 \| > +| AM572x EVM | 0 | h | | | -s 1500 | > +| | 0 | 0 | |--+ | > +| Only 2 classes: |Mb +---| +-------------------------------+ > +| class A, class B | | > +| | +---| +-------------------------------+ > +| | 1 | E | |--+ | > +| | 0 | t | | | Workstation1 | > +| | 0 | h |--+ |E | MAC 20:cf:30:85:7d:fd | > +| |Mb | 1 | +--|t | | > ++-----------------------------+ |h |./tsn_listener -d \ | > + |0 | 20:cf:30:85:7d:fd -i eth0 \| > + | | -s 1500 | > + |--+ | > + +-------------------------------+ > + > +********************************************************************* > +********************************************************************* > +********************************************************************* > +Example 1: One port tx AVB configuration scheme for target board > +---------------------------------------------------------------------- > +(prints and scheme for AM52xx evm, applicable for single port boards) > + > +tc - traffic class > +txq - transmit queue > +p - priority > +f - fifo (cpsw fifo) > +S - shaper configured > + > ++------------------------------------------------------------------+ u > +| +---------------+ +---------------+ +------+ +------+ | s > +| | | | | | | | | | e > +| | App 1 | | App 2 | | Apps | | Apps | | r > +| | Class A | | Class B | | Rest | | Rest | | > +| | Eth0 | | Eth0 | | Eth0 | | Eth1 | | s > +| | VLAN100 | | VLAN100 | | | | | | | | p > +| | 40 Mb/s | | 20 Mb/s | | | | | | | | a > +| | SO_PRIORITY=3 | | SO_PRIORITY=2 | | | | | | | | c > +| | | | | | | | | | | | | | e > +| +---|-----------+ +---|-----------+ +---|--+ +---|--+ | > ++-----|------------------|------------------|--------|-------------+ > + +-+ +------------+ | | > + | | +-----------------+ +--+ > + | | | | > ++---|-------|-------------|-----------------------|----------------+ > +| +----+ +----+ +----+ +----+ +----+ | > +| | p3 | | p2 | | p1 | | p0 | | p0 | | k > +| \ / \ / \ / \ / \ / | e > +| \ / \ / \ / \ / \ / | r > +| \/ \/ \/ \/ \/ | n > +| | | | | | e > +| | | +-----+ | | l > +| | | | | | > +| +----+ +----+ +----+ +----+ | s > +| |tc0 | |tc1 | |tc2 | |tc0 | | p > +| \ / \ / \ / \ / | a > +| \ / \ / \ / \ / | c > +| \/ \/ \/ \/ | e > +| | | +-----+ | | > +| | | | | | | > +| | | | | | | > +| | | | | | | > +| +----+ +----+ +----+ +----+ +----+ | > +| |txq0| |txq1| |txq2| |txq3| |txq4| | > +| \ / \ / \ / \ / \ / | > +| \ / \ / \ / \ / \ / | > +| \/ \/ \/ \/ \/ | > +| +-|------|------|------|--+ +--|--------------+ | > +| | | | | | | Eth0.100 | | Eth1 | | > ++---|------|------|------|------------------------|----------------+ > + | | | | | > + p p p p | > + 3 2 0-1, 4-7 <- L2 priority | > + | | | | | > + | | | | | > ++---|------|------|------|------------------------|----------------+ > +| | | | | |----------+ | > +| +----+ +----+ +----+ +----+ +----+ | > +| |dma7| |dma6| |dma5| |dma4| |dma3| | > +| \ / \ / \ / \ / \ / | c > +| \S / \S / \ / \ / \ / | p > +| \/ \/ \/ \/ \/ | s > +| | | | +----- | | w > +| | | | | | | > +| | | | | | | d > +| +----+ +----+ +----+p p+----+ | r > +| | | | | | |o o| | | i > +| | f3 | | f2 | | f0 |r r| f0 | | v > +| |tc0 | |tc1 | |tc2 |t t|tc0 | | e > +| \CBS / \CBS / \CBS /1 2\CBS / | r > +| \S / \S / \ / \ / | > +| \/ \/ \/ \/ | > ++------------------------------------------------------------------+ > +========================================Eth==========================> > + > +1) > +// Add 4 tx queues, for interface Eth0, and 1 tx queue for Eth1 > +$ ethtool -L eth0 rx 1 tx 5 > +rx unmodified, ignoring > + > +2) > +// Check if num of queues is set correctly: > +$ ethtool -l eth0 > +Channel parameters for eth0: > +Pre-set maximums: > +RX: 8 > +TX: 8 > +Other: 0 > +Combined: 0 > +Current hardware settings: > +RX: 1 > +TX: 5 > +Other: 0 > +Combined: 0 > + > +3) > +// TX queues must be rated starting from 0, so set bws for tx0 and tx1 > +// Set rates 40 and 20 Mb/s appropriately. > +// Pay attention, real speed can differ a bit due to discreetness. > +// Leave last 2 tx queues not rated. > +$ echo 40 > /sys/class/net/eth0/queues/tx-0/tx_maxrate > +$ echo 20 > /sys/class/net/eth0/queues/tx-1/tx_maxrate > + > +4) > +// Check maximum rate of tx (cpdma) queues: > +$ cat /sys/class/net/eth0/queues/tx-*/tx_maxrate > +40 > +20 > +0 > +0 > +0 > + > +5) > +// Map skb->priority to traffic class: > +// 3pri -> tc0, 2pri -> tc1, (0,1,4-7)pri -> tc2 > +// Map traffic class to transmit queue: > +// tc0 -> txq0, tc1 -> txq1, tc2 -> (txq2, txq3) > +$ tc qdisc replace dev eth0 handle 100: parent root mqprio num_tc 3 \ > +map 2 2 1 0 2 2 2 2 2 2 2 2 2 2 2 2 queues 1@0 1@1 2@2 hw 1 > + > +5a) > +// As two interface sharing same set of tx queues, assign all traffic > +// coming to interface Eth1 to separate queue in order to not mix it > +// with traffic from interface Eth0, so use separate txq to send > +// packets to Eth1, so all prio -> tc0 and tc0 -> txq4 > +// Here hw 0, so here still default configuration for eth1 in hw > +$ tc qdisc replace dev eth1 handle 100: parent root mqprio num_tc 1 \ > +map 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 queues 1@4 hw 0 > + > +6) > +// Check classes settings > +$ tc -g class show dev eth0 > ++---(100:ffe2) mqprio > +| +---(100:3) mqprio > +| +---(100:4) mqprio > +| > ++---(100:ffe1) mqprio > +| +---(100:2) mqprio > +| > ++---(100:ffe0) mqprio > + +---(100:1) mqprio > + > +$ tc -g class show dev eth1 > ++---(100:ffe0) mqprio > + +---(100:5) mqprio > + > +7) > +// Set rate for class A - 41 Mbit (tc0, txq0) using CBS Qdisc > +// Set it +1 Mb for reserve (important!) > +// here only idle slope is important, others arg are ignored > +// Pay attention, real speed can differ a bit due to discreetness > +$ tc qdisc add dev eth0 parent 100:1 cbs locredit -1438 \ > +hicredit 62 sendslope -959000 idleslope 41000 offload 1 > +net eth0: set FIFO3 bw = 50 > + > +8) > +// Set rate for class B - 21 Mbit (tc1, txq1) using CBS Qdisc: > +// Set it +1 Mb for reserve (important!) > +$ tc qdisc add dev eth0 parent 100:2 cbs locredit -1468 \ > +hicredit 65 sendslope -979000 idleslope 21000 offload 1 > +net eth0: set FIFO2 bw = 30 > + > +9) > +// Create vlan 100 to map sk->priority to vlan qos > +$ ip link add link eth0 name eth0.100 type vlan id 100 > +8021q: 802.1Q VLAN Support v1.8 > +8021q: adding VLAN 0 to HW filter on device eth0 > +8021q: adding VLAN 0 to HW filter on device eth1 > +net eth0: Adding vlanid 100 to vlan filter > + > +10) > +// Map skb->priority to L2 prio, 1 to 1 > +$ ip link set eth0.100 type vlan \ > +egress 0:0 1:1 2:2 3:3 4:4 5:5 6:6 7:7 > + > +11) > +// Check egress map for vlan 100 > +$ cat /proc/net/vlan/eth0.100 > +[...] > +INGRESS priority mappings: 0:0 1:0 2:0 3:0 4:0 5:0 6:0 7:0 > +EGRESS priority mappings: 0:0 1:1 2:2 3:3 4:4 5:5 6:6 7:7 > + > +12) > +// Run your appropriate tools with socket option "SO_PRIORITY" > +// to 3 for class A and/or to 2 for class B > +// (I took at https://www.spinics.net/lists/netdev/msg460869.html) > +./tsn_talker -d 18:03:73:66:87:42 -i eth0.100 -p3 -s 1500& > +./tsn_talker -d 18:03:73:66:87:42 -i eth0.100 -p2 -s 1500& > + > +13) > +// run your listener on workstation (should be in same vlan) > +// (I took at https://www.spinics.net/lists/netdev/msg460869.html) > +./tsn_listener -d 18:03:73:66:87:42 -i enp5s0 -s 1500 > +Receiving data rate: 39012 kbps > +Receiving data rate: 39012 kbps > +Receiving data rate: 39012 kbps > +Receiving data rate: 39012 kbps > +Receiving data rate: 39012 kbps > +Receiving data rate: 39012 kbps > +Receiving data rate: 39012 kbps > +Receiving data rate: 39012 kbps > +Receiving data rate: 39012 kbps > +Receiving data rate: 39012 kbps > +Receiving data rate: 39012 kbps > +Receiving data rate: 39012 kbps > +Receiving data rate: 39000 kbps > + > +14) > +// Restore default configuration if needed > +$ ip link del eth0.100 > +$ tc qdisc del dev eth1 root > +$ tc qdisc del dev eth0 root > +net eth0: Prev FIFO2 is shaped > +net eth0: set FIFO3 bw = 0 > +net eth0: set FIFO2 bw = 0 > +$ ethtool -L eth0 rx 1 tx 1 > + > +********************************************************************* > +********************************************************************* > +********************************************************************* > +Example 2: Two port tx AVB configuration scheme for target board > +---------------------------------------------------------------------- > +(prints and scheme for AM52xx evm, for dual emac boards only) > + > ++------------------------------------------------------------------+ u > +| +----------+ +----------+ +------+ +----------+ +----------+ | s > +| | | | | | | | | | | | e > +| | App 1 | | App 2 | | Apps | | App 3 | | App 4 | | r > +| | Class A | | Class B | | Rest | | Class B | | Class A | | > +| | Eth0 | | Eth0 | | | | | Eth1 | | Eth1 | | s > +| | VLAN100 | | VLAN100 | | | | | VLAN100 | | VLAN100 | | p > +| | 40 Mb/s | | 20 Mb/s | | | | | 10 Mb/s | | 30 Mb/s | | a > +| | SO_PRI=3 | | SO_PRI=2 | | | | | SO_PRI=3 | | SO_PRI=2 | | c > +| | | | | | | | | | | | | | | | | e > +| +---|------+ +---|------+ +---|--+ +---|------+ +---|------+ | > ++-----|-------------|-------------|---------|-------------|--------+ > + +-+ +-------+ | +----------+ +----+ > + | | +-------+------+ | | > + | | | | | | > ++---|-------|-------------|--------------|-------------|-------|---+ > +| +----+ +----+ +----+ +----+ +----+ +----+ +----+ +----+ | > +| | p3 | | p2 | | p1 | | p0 | | p0 | | p1 | | p2 | | p3 | | k > +| \ / \ / \ / \ / \ / \ / \ / \ / | e > +| \ / \ / \ / \ / \ / \ / \ / \ / | r > +| \/ \/ \/ \/ \/ \/ \/ \/ | n > +| | | | | | | | e > +| | | +----+ +----+ | | | l > +| | | | | | | | > +| +----+ +----+ +----+ +----+ +----+ +----+ | s > +| |tc0 | |tc1 | |tc2 | |tc2 | |tc1 | |tc0 | | p > +| \ / \ / \ / \ / \ / \ / | a > +| \ / \ / \ / \ / \ / \ / | c > +| \/ \/ \/ \/ \/ \/ | e > +| | | +-----+ +-----+ | | | > +| | | | | | | | | | > +| | | | | | | | | | > +| | | | | E E | | | | | > +| +----+ +----+ +----+ +----+ t t +----+ +----+ +----+ +----+ | > +| |txq0| |txq1| |txq4| |txq5| h h |txq6| |txq7| |txq3| |txq2| | > +| \ / \ / \ / \ / 0 1 \ / \ / \ / \ / | > +| \ / \ / \ / \ / . . \ / \ / \ / \ / | > +| \/ \/ \/ \/ 1 1 \/ \/ \/ \/ | > +| +-|------|------|------|--+ 0 0 +-|------|------|------|--+ | > +| | | | | | | 0 0 | | | | | | | > ++---|------|------|------|---------------|------|------|------|----+ > + | | | | | | | | > + p p p p p p p p > + 3 2 0-1, 4-7 <-L2 pri-> 0-1, 4-7 2 3 > + | | | | | | | | > + | | | | | | | | > ++---|------|------|------|---------------|------|------|------|----+ > +| | | | | | | | | | > +| +----+ +----+ +----+ +----+ +----+ +----+ +----+ +----+ | > +| |dma7| |dma6| |dma3| |dma2| |dma1| |dma0| |dma4| |dma5| | > +| \ / \ / \ / \ / \ / \ / \ / \ / | c > +| \S / \S / \ / \ / \ / \ / \S / \S / | p > +| \/ \/ \/ \/ \/ \/ \/ \/ | s > +| | | | +----- | | | | | w > +| | | | | +----+ | | | | > +| | | | | | | | | | d > +| +----+ +----+ +----+p p+----+ +----+ +----+ | r > +| | | | | | |o o| | | | | | | i > +| | f3 | | f2 | | f0 |r CPSW r| f3 | | f2 | | f0 | | v > +| |tc0 | |tc1 | |tc2 |t t|tc0 | |tc1 | |tc2 | | e > +| \CBS / \CBS / \CBS /1 2\CBS / \CBS / \CBS / | r > +| \S / \S / \ / \S / \S / \ / | > +| \/ \/ \/ \/ \/ \/ | > ++------------------------------------------------------------------+ > +========================================Eth==========================> > + > +1) > +// Add 8 tx queues, for interface Eth0, but they are common, so are accessed > +// by two interfaces Eth0 and Eth1. > +$ ethtool -L eth1 rx 1 tx 8 > +rx unmodified, ignoring > + > +2) > +// Check if num of queues is set correctly: > +$ ethtool -l eth0 > +Channel parameters for eth0: > +Pre-set maximums: > +RX: 8 > +TX: 8 > +Other: 0 > +Combined: 0 > +Current hardware settings: > +RX: 1 > +TX: 8 > +Other: 0 > +Combined: 0 > + > +3) > +// TX queues must be rated starting from 0, so set bws for tx0 and tx1 for Eth0 > +// and for tx2 and tx3 for Eth1. That is, rates 40 and 20 Mb/s appropriately > +// for Eth0 and 30 and 10 Mb/s for Eth1. > +// Real speed can differ a bit due to discreetness > +// Leave last 4 tx queues as not rated > +$ echo 40 > /sys/class/net/eth0/queues/tx-0/tx_maxrate > +$ echo 20 > /sys/class/net/eth0/queues/tx-1/tx_maxrate > +$ echo 30 > /sys/class/net/eth1/queues/tx-2/tx_maxrate > +$ echo 10 > /sys/class/net/eth1/queues/tx-3/tx_maxrate > + > +4) > +// Check maximum rate of tx (cpdma) queues: > +$ cat /sys/class/net/eth0/queues/tx-*/tx_maxrate > +40 > +20 > +30 > +10 > +0 > +0 > +0 > +0 > + > +5) > +// Map skb->priority to traffic class for Eth0: > +// 3pri -> tc0, 2pri -> tc1, (0,1,4-7)pri -> tc2 > +// Map traffic class to transmit queue: > +// tc0 -> txq0, tc1 -> txq1, tc2 -> (txq4, txq5) > +$ tc qdisc replace dev eth0 handle 100: parent root mqprio num_tc 3 \ > +map 2 2 1 0 2 2 2 2 2 2 2 2 2 2 2 2 queues 1@0 1@1 2@4 hw 1 > + > +6) > +// Check classes settings > +$ tc -g class show dev eth0 > ++---(100:ffe2) mqprio > +| +---(100:5) mqprio > +| +---(100:6) mqprio > +| > ++---(100:ffe1) mqprio > +| +---(100:2) mqprio > +| > ++---(100:ffe0) mqprio > + +---(100:1) mqprio > + > +7) > +// Set rate for class A - 41 Mbit (tc0, txq0) using CBS Qdisc for Eth0 > +// here only idle slope is important, others ignored > +// Real speed can differ a bit due to discreetness > +$ tc qdisc add dev eth0 parent 100:1 cbs locredit -1470 \ > +hicredit 62 sendslope -959000 idleslope 41000 offload 1 > +net eth0: set FIFO3 bw = 50 > + > +8) > +// Set rate for class B - 21 Mbit (tc1, txq1) using CBS Qdisc for Eth0 > +$ tc qdisc add dev eth0 parent 100:2 cbs locredit -1470 \ > +hicredit 65 sendslope -979000 idleslope 21000 offload 1 > +net eth0: set FIFO2 bw = 30 > + > +9) > +// Create vlan 100 to map sk->priority to vlan qos for Eth0 > +$ ip link add link eth0 name eth0.100 type vlan id 100 > +net eth0: Adding vlanid 100 to vlan filter > + > +10) > +// Map skb->priority to L2 prio for Eth0.100, one to one > +$ ip link set eth0.100 type vlan \ > +egress 0:0 1:1 2:2 3:3 4:4 5:5 6:6 7:7 > + > +11) > +// Check egress map for vlan 100 > +$ cat /proc/net/vlan/eth0.100 > +[...] > +INGRESS priority mappings: 0:0 1:0 2:0 3:0 4:0 5:0 6:0 7:0 > +EGRESS priority mappings: 0:0 1:1 2:2 3:3 4:4 5:5 6:6 7:7 > + > +12) > +// Map skb->priority to traffic class for Eth1: > +// 3pri -> tc0, 2pri -> tc1, (0,1,4-7)pri -> tc2 > +// Map traffic class to transmit queue: > +// tc0 -> txq2, tc1 -> txq3, tc2 -> (txq6, txq7) > +$ tc qdisc replace dev eth1 handle 100: parent root mqprio num_tc 3 \ > +map 2 2 1 0 2 2 2 2 2 2 2 2 2 2 2 2 queues 1@2 1@3 2@6 hw 1 > + > +13) > +// Check classes settings > +$ tc -g class show dev eth1 > ++---(100:ffe2) mqprio > +| +---(100:7) mqprio > +| +---(100:8) mqprio > +| > ++---(100:ffe1) mqprio > +| +---(100:4) mqprio > +| > ++---(100:ffe0) mqprio > + +---(100:3) mqprio > + > +14) > +// Set rate for class A - 31 Mbit (tc0, txq2) using CBS Qdisc for Eth1 > +// here only idle slope is important, others ignored > +// Set it +1 Mb for reserve (important!) > +$ tc qdisc add dev eth1 parent 100:3 cbs locredit -1453 \ > +hicredit 47 sendslope -969000 idleslope 31000 offload 1 > +net eth1: set FIFO3 bw = 31 > + > +15) > +// Set rate for class B - 11 Mbit (tc1, txq3) using CBS Qdisc for Eth1 > +// Set it +1 Mb for reserve (important!) > +$ tc qdisc add dev eth1 parent 100:4 cbs locredit -1483 \ > +hicredit 34 sendslope -989000 idleslope 11000 offload 1 > +net eth1: set FIFO2 bw = 11 > + > +16) > +// Create vlan 100 to map sk->priority to vlan qos for Eth1 > +$ ip link add link eth1 name eth1.100 type vlan id 100 > +net eth1: Adding vlanid 100 to vlan filter > + > +17) > +// Map skb->priority to L2 prio for Eth1.100, one to one > +$ ip link set eth1.100 type vlan \ > +egress 0:0 1:1 2:2 3:3 4:4 5:5 6:6 7:7 > + > +18) > +// Check egress map for vlan 100 > +$ cat /proc/net/vlan/eth1.100 > +[...] > +INGRESS priority mappings: 0:0 1:0 2:0 3:0 4:0 5:0 6:0 7:0 > +EGRESS priority mappings: 0:0 1:1 2:2 3:3 4:4 5:5 6:6 7:7 > + > +19) > +// Run appropriate tools with socket option "SO_PRIORITY" to 3 > +// for class A and to 2 for class B. For both interfaces > +./tsn_talker -d 18:03:73:66:87:42 -i eth0.100 -p2 -s 1500& > +./tsn_talker -d 18:03:73:66:87:42 -i eth0.100 -p3 -s 1500& > +./tsn_talker -d 20:cf:30:85:7d:fd -i eth1.100 -p2 -s 1500& > +./tsn_talker -d 20:cf:30:85:7d:fd -i eth1.100 -p3 -s 1500& > + > +20) > +// run your listener on workstation (should be in same vlan) > +// (I took at https://www.spinics.net/lists/netdev/msg460869.html) > +./tsn_listener -d 18:03:73:66:87:42 -i enp5s0 -s 1500 > +Receiving data rate: 39012 kbps > +Receiving data rate: 39012 kbps > +Receiving data rate: 39012 kbps > +Receiving data rate: 39012 kbps > +Receiving data rate: 39012 kbps > +Receiving data rate: 39012 kbps > +Receiving data rate: 39012 kbps > +Receiving data rate: 39012 kbps > +Receiving data rate: 39012 kbps > +Receiving data rate: 39012 kbps > +Receiving data rate: 39012 kbps > +Receiving data rate: 39012 kbps > +Receiving data rate: 39000 kbps > + > +21) > +// Restore default configuration if needed > +$ ip link del eth1.100 > +$ ip link del eth0.100 > +$ tc qdisc del dev eth1 root > +net eth1: Prev FIFO2 is shaped > +net eth1: set FIFO3 bw = 0 > +net eth1: set FIFO2 bw = 0 > +$ tc qdisc del dev eth0 root > +net eth0: Prev FIFO2 is shaped > +net eth0: set FIFO3 bw = 0 > +net eth0: set FIFO2 bw = 0 > +$ ethtool -L eth0 rx 1 tx 1 > -- > 2.17.1 >
On Sat, Jul 21, 2018 at 08:10:29AM -0700, Richard Cochran wrote: >On Sat, Jul 21, 2018 at 02:59:23PM +0300, Ivan Khoronzhuk wrote: >> This document describes MQPRIO and CBS Qdisc offload configuration >> for cpsw driver based on examples. It potentially can be used in >> audio video bridging (AVB) and time sensitive networking (TSN). >> >> Reviewed-by: Grygorii Strashko <grygorii.strashko@ti.com> >> Signed-off-by: Ivan Khoronzhuk <ivan.khoronzhuk@linaro.org> >> --- >> Documentation/networking/ti-cpsw.txt | 540 +++++++++++++++++++++++++++ >> 1 file changed, 540 insertions(+) >> create mode 100644 Documentation/networking/ti-cpsw.txt >> >> diff --git a/Documentation/networking/ti-cpsw.txt b/Documentation/networking/ti-cpsw.txt >> new file mode 100644 >> index 000000000000..1e840346cae1 >> --- /dev/null >> +++ b/Documentation/networking/ti-cpsw.txt >> @@ -0,0 +1,540 @@ >> +* Texas Instruments CPSW ethernet driver >> + >> +Multiqueue & CBS & MQPRIO >> +===================================================================== >> +===================================================================== >> + >> +The cpsw has 3 CBS shapers for each external ports. This document >> +describes MQPRIO and CBS Qdisc offload configuration for cpsw driver >> +based on examples. It potentially can be used in audio video bridging >> +(AVB) and time sensitive networking (TSN). >> + >> +The following examples was tested on AM572x EVM and BBB boards. >> + >> +Test setup >> +========== >> + >> +Under consideration two examples with AM52xx EVM running cpsw driver >> +in dual_emac mode. > >s/AM52xx/AM572x ? yes, AM572x > >Also, there are more mentions of AM52xx, below. I'll correct. > >Thanks, >Richard > > >> + >> +Several prerequisites: >> +- TX queues must be rated starting from txq0 that has highest priority >> +- Traffic classes are used starting from 0, that has highest priority >> +- CBS shapers should be used with rated queues >> +- The bandwidth for CBS shapers has to be set a little bit more then >> + potential incoming rate, thus, rate of all incoming tx queues has >> + to be a little less >> +- Real rates can differ, due to discreetness >> +- Map skb-priority to txq is not enough, also skb-priority to l2 prio >> + map has to be created with ip or vconfig tool >> +- Any l2/socket prio (0 - 7) for classes can be used, but for >> + simplicity default values are used: 3 and 2 >> +- only 2 classes tested: A and B, but checked and can work with more, >> + maximum allowed 4, but only for 3 rate can be set. >> + >> +Test setup for examples >> +======================= >> + +-------------------------------+ >> + |--+ | >> + | | Workstation0 | >> + |E | MAC 18:03:73:66:87:42 | >> ++-----------------------------+ +--|t | | >> +| | 1 | E | | |h |./tsn_listener -d \ | >> +| Target board: | 0 | t |--+ |0 | 18:03:73:66:87:42 -i eth0 \| >> +| AM572x EVM | 0 | h | | | -s 1500 | >> +| | 0 | 0 | |--+ | >> +| Only 2 classes: |Mb +---| +-------------------------------+ >> +| class A, class B | | >> +| | +---| +-------------------------------+ >> +| | 1 | E | |--+ | >> +| | 0 | t | | | Workstation1 | >> +| | 0 | h |--+ |E | MAC 20:cf:30:85:7d:fd | >> +| |Mb | 1 | +--|t | | >> ++-----------------------------+ |h |./tsn_listener -d \ | >> + |0 | 20:cf:30:85:7d:fd -i eth0 \| >> + | | -s 1500 | >> + |--+ | >> + +-------------------------------+ >> + >> +********************************************************************* >> +********************************************************************* >> +********************************************************************* >> +Example 1: One port tx AVB configuration scheme for target board >> +---------------------------------------------------------------------- >> +(prints and scheme for AM52xx evm, applicable for single port boards) >> + >> +tc - traffic class >> +txq - transmit queue >> +p - priority >> +f - fifo (cpsw fifo) >> +S - shaper configured >> + >> ++------------------------------------------------------------------+ u >> +| +---------------+ +---------------+ +------+ +------+ | s >> +| | | | | | | | | | e >> +| | App 1 | | App 2 | | Apps | | Apps | | r >> +| | Class A | | Class B | | Rest | | Rest | | >> +| | Eth0 | | Eth0 | | Eth0 | | Eth1 | | s >> +| | VLAN100 | | VLAN100 | | | | | | | | p >> +| | 40 Mb/s | | 20 Mb/s | | | | | | | | a >> +| | SO_PRIORITY=3 | | SO_PRIORITY=2 | | | | | | | | c >> +| | | | | | | | | | | | | | e >> +| +---|-----------+ +---|-----------+ +---|--+ +---|--+ | >> ++-----|------------------|------------------|--------|-------------+ >> + +-+ +------------+ | | >> + | | +-----------------+ +--+ >> + | | | | >> ++---|-------|-------------|-----------------------|----------------+ >> +| +----+ +----+ +----+ +----+ +----+ | >> +| | p3 | | p2 | | p1 | | p0 | | p0 | | k >> +| \ / \ / \ / \ / \ / | e >> +| \ / \ / \ / \ / \ / | r >> +| \/ \/ \/ \/ \/ | n >> +| | | | | | e >> +| | | +-----+ | | l >> +| | | | | | >> +| +----+ +----+ +----+ +----+ | s >> +| |tc0 | |tc1 | |tc2 | |tc0 | | p >> +| \ / \ / \ / \ / | a >> +| \ / \ / \ / \ / | c >> +| \/ \/ \/ \/ | e >> +| | | +-----+ | | >> +| | | | | | | >> +| | | | | | | >> +| | | | | | | >> +| +----+ +----+ +----+ +----+ +----+ | >> +| |txq0| |txq1| |txq2| |txq3| |txq4| | >> +| \ / \ / \ / \ / \ / | >> +| \ / \ / \ / \ / \ / | >> +| \/ \/ \/ \/ \/ | >> +| +-|------|------|------|--+ +--|--------------+ | >> +| | | | | | | Eth0.100 | | Eth1 | | >> ++---|------|------|------|------------------------|----------------+ >> + | | | | | >> + p p p p | >> + 3 2 0-1, 4-7 <- L2 priority | >> + | | | | | >> + | | | | | >> ++---|------|------|------|------------------------|----------------+ >> +| | | | | |----------+ | >> +| +----+ +----+ +----+ +----+ +----+ | >> +| |dma7| |dma6| |dma5| |dma4| |dma3| | >> +| \ / \ / \ / \ / \ / | c >> +| \S / \S / \ / \ / \ / | p >> +| \/ \/ \/ \/ \/ | s >> +| | | | +----- | | w >> +| | | | | | | >> +| | | | | | | d >> +| +----+ +----+ +----+p p+----+ | r >> +| | | | | | |o o| | | i >> +| | f3 | | f2 | | f0 |r r| f0 | | v >> +| |tc0 | |tc1 | |tc2 |t t|tc0 | | e >> +| \CBS / \CBS / \CBS /1 2\CBS / | r >> +| \S / \S / \ / \ / | >> +| \/ \/ \/ \/ | >> ++------------------------------------------------------------------+ >> +========================================Eth==========================> >> + >> +1) >> +// Add 4 tx queues, for interface Eth0, and 1 tx queue for Eth1 >> +$ ethtool -L eth0 rx 1 tx 5 >> +rx unmodified, ignoring >> + >> +2) >> +// Check if num of queues is set correctly: >> +$ ethtool -l eth0 >> +Channel parameters for eth0: >> +Pre-set maximums: >> +RX: 8 >> +TX: 8 >> +Other: 0 >> +Combined: 0 >> +Current hardware settings: >> +RX: 1 >> +TX: 5 >> +Other: 0 >> +Combined: 0 >> + >> +3) >> +// TX queues must be rated starting from 0, so set bws for tx0 and tx1 >> +// Set rates 40 and 20 Mb/s appropriately. >> +// Pay attention, real speed can differ a bit due to discreetness. >> +// Leave last 2 tx queues not rated. >> +$ echo 40 > /sys/class/net/eth0/queues/tx-0/tx_maxrate >> +$ echo 20 > /sys/class/net/eth0/queues/tx-1/tx_maxrate >> + >> +4) >> +// Check maximum rate of tx (cpdma) queues: >> +$ cat /sys/class/net/eth0/queues/tx-*/tx_maxrate >> +40 >> +20 >> +0 >> +0 >> +0 >> + >> +5) >> +// Map skb->priority to traffic class: >> +// 3pri -> tc0, 2pri -> tc1, (0,1,4-7)pri -> tc2 >> +// Map traffic class to transmit queue: >> +// tc0 -> txq0, tc1 -> txq1, tc2 -> (txq2, txq3) >> +$ tc qdisc replace dev eth0 handle 100: parent root mqprio num_tc 3 \ >> +map 2 2 1 0 2 2 2 2 2 2 2 2 2 2 2 2 queues 1@0 1@1 2@2 hw 1 >> + >> +5a) >> +// As two interface sharing same set of tx queues, assign all traffic >> +// coming to interface Eth1 to separate queue in order to not mix it >> +// with traffic from interface Eth0, so use separate txq to send >> +// packets to Eth1, so all prio -> tc0 and tc0 -> txq4 >> +// Here hw 0, so here still default configuration for eth1 in hw >> +$ tc qdisc replace dev eth1 handle 100: parent root mqprio num_tc 1 \ >> +map 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 queues 1@4 hw 0 >> + >> +6) >> +// Check classes settings >> +$ tc -g class show dev eth0 >> ++---(100:ffe2) mqprio >> +| +---(100:3) mqprio >> +| +---(100:4) mqprio >> +| >> ++---(100:ffe1) mqprio >> +| +---(100:2) mqprio >> +| >> ++---(100:ffe0) mqprio >> + +---(100:1) mqprio >> + >> +$ tc -g class show dev eth1 >> ++---(100:ffe0) mqprio >> + +---(100:5) mqprio >> + >> +7) >> +// Set rate for class A - 41 Mbit (tc0, txq0) using CBS Qdisc >> +// Set it +1 Mb for reserve (important!) >> +// here only idle slope is important, others arg are ignored >> +// Pay attention, real speed can differ a bit due to discreetness >> +$ tc qdisc add dev eth0 parent 100:1 cbs locredit -1438 \ >> +hicredit 62 sendslope -959000 idleslope 41000 offload 1 >> +net eth0: set FIFO3 bw = 50 >> + >> +8) >> +// Set rate for class B - 21 Mbit (tc1, txq1) using CBS Qdisc: >> +// Set it +1 Mb for reserve (important!) >> +$ tc qdisc add dev eth0 parent 100:2 cbs locredit -1468 \ >> +hicredit 65 sendslope -979000 idleslope 21000 offload 1 >> +net eth0: set FIFO2 bw = 30 >> + >> +9) >> +// Create vlan 100 to map sk->priority to vlan qos >> +$ ip link add link eth0 name eth0.100 type vlan id 100 >> +8021q: 802.1Q VLAN Support v1.8 >> +8021q: adding VLAN 0 to HW filter on device eth0 >> +8021q: adding VLAN 0 to HW filter on device eth1 >> +net eth0: Adding vlanid 100 to vlan filter >> + >> +10) >> +// Map skb->priority to L2 prio, 1 to 1 >> +$ ip link set eth0.100 type vlan \ >> +egress 0:0 1:1 2:2 3:3 4:4 5:5 6:6 7:7 >> + >> +11) >> +// Check egress map for vlan 100 >> +$ cat /proc/net/vlan/eth0.100 >> +[...] >> +INGRESS priority mappings: 0:0 1:0 2:0 3:0 4:0 5:0 6:0 7:0 >> +EGRESS priority mappings: 0:0 1:1 2:2 3:3 4:4 5:5 6:6 7:7 >> + >> +12) >> +// Run your appropriate tools with socket option "SO_PRIORITY" >> +// to 3 for class A and/or to 2 for class B >> +// (I took at https://www.spinics.net/lists/netdev/msg460869.html) >> +./tsn_talker -d 18:03:73:66:87:42 -i eth0.100 -p3 -s 1500& >> +./tsn_talker -d 18:03:73:66:87:42 -i eth0.100 -p2 -s 1500& >> + >> +13) >> +// run your listener on workstation (should be in same vlan) >> +// (I took at https://www.spinics.net/lists/netdev/msg460869.html) >> +./tsn_listener -d 18:03:73:66:87:42 -i enp5s0 -s 1500 >> +Receiving data rate: 39012 kbps >> +Receiving data rate: 39012 kbps >> +Receiving data rate: 39012 kbps >> +Receiving data rate: 39012 kbps >> +Receiving data rate: 39012 kbps >> +Receiving data rate: 39012 kbps >> +Receiving data rate: 39012 kbps >> +Receiving data rate: 39012 kbps >> +Receiving data rate: 39012 kbps >> +Receiving data rate: 39012 kbps >> +Receiving data rate: 39012 kbps >> +Receiving data rate: 39012 kbps >> +Receiving data rate: 39000 kbps >> + >> +14) >> +// Restore default configuration if needed >> +$ ip link del eth0.100 >> +$ tc qdisc del dev eth1 root >> +$ tc qdisc del dev eth0 root >> +net eth0: Prev FIFO2 is shaped >> +net eth0: set FIFO3 bw = 0 >> +net eth0: set FIFO2 bw = 0 >> +$ ethtool -L eth0 rx 1 tx 1 >> + >> +********************************************************************* >> +********************************************************************* >> +********************************************************************* >> +Example 2: Two port tx AVB configuration scheme for target board >> +---------------------------------------------------------------------- >> +(prints and scheme for AM52xx evm, for dual emac boards only) >> + >> ++------------------------------------------------------------------+ u >> +| +----------+ +----------+ +------+ +----------+ +----------+ | s >> +| | | | | | | | | | | | e >> +| | App 1 | | App 2 | | Apps | | App 3 | | App 4 | | r >> +| | Class A | | Class B | | Rest | | Class B | | Class A | | >> +| | Eth0 | | Eth0 | | | | | Eth1 | | Eth1 | | s >> +| | VLAN100 | | VLAN100 | | | | | VLAN100 | | VLAN100 | | p >> +| | 40 Mb/s | | 20 Mb/s | | | | | 10 Mb/s | | 30 Mb/s | | a >> +| | SO_PRI=3 | | SO_PRI=2 | | | | | SO_PRI=3 | | SO_PRI=2 | | c >> +| | | | | | | | | | | | | | | | | e >> +| +---|------+ +---|------+ +---|--+ +---|------+ +---|------+ | >> ++-----|-------------|-------------|---------|-------------|--------+ >> + +-+ +-------+ | +----------+ +----+ >> + | | +-------+------+ | | >> + | | | | | | >> ++---|-------|-------------|--------------|-------------|-------|---+ >> +| +----+ +----+ +----+ +----+ +----+ +----+ +----+ +----+ | >> +| | p3 | | p2 | | p1 | | p0 | | p0 | | p1 | | p2 | | p3 | | k >> +| \ / \ / \ / \ / \ / \ / \ / \ / | e >> +| \ / \ / \ / \ / \ / \ / \ / \ / | r >> +| \/ \/ \/ \/ \/ \/ \/ \/ | n >> +| | | | | | | | e >> +| | | +----+ +----+ | | | l >> +| | | | | | | | >> +| +----+ +----+ +----+ +----+ +----+ +----+ | s >> +| |tc0 | |tc1 | |tc2 | |tc2 | |tc1 | |tc0 | | p >> +| \ / \ / \ / \ / \ / \ / | a >> +| \ / \ / \ / \ / \ / \ / | c >> +| \/ \/ \/ \/ \/ \/ | e >> +| | | +-----+ +-----+ | | | >> +| | | | | | | | | | >> +| | | | | | | | | | >> +| | | | | E E | | | | | >> +| +----+ +----+ +----+ +----+ t t +----+ +----+ +----+ +----+ | >> +| |txq0| |txq1| |txq4| |txq5| h h |txq6| |txq7| |txq3| |txq2| | >> +| \ / \ / \ / \ / 0 1 \ / \ / \ / \ / | >> +| \ / \ / \ / \ / . . \ / \ / \ / \ / | >> +| \/ \/ \/ \/ 1 1 \/ \/ \/ \/ | >> +| +-|------|------|------|--+ 0 0 +-|------|------|------|--+ | >> +| | | | | | | 0 0 | | | | | | | >> ++---|------|------|------|---------------|------|------|------|----+ >> + | | | | | | | | >> + p p p p p p p p >> + 3 2 0-1, 4-7 <-L2 pri-> 0-1, 4-7 2 3 >> + | | | | | | | | >> + | | | | | | | | >> ++---|------|------|------|---------------|------|------|------|----+ >> +| | | | | | | | | | >> +| +----+ +----+ +----+ +----+ +----+ +----+ +----+ +----+ | >> +| |dma7| |dma6| |dma3| |dma2| |dma1| |dma0| |dma4| |dma5| | >> +| \ / \ / \ / \ / \ / \ / \ / \ / | c >> +| \S / \S / \ / \ / \ / \ / \S / \S / | p >> +| \/ \/ \/ \/ \/ \/ \/ \/ | s >> +| | | | +----- | | | | | w >> +| | | | | +----+ | | | | >> +| | | | | | | | | | d >> +| +----+ +----+ +----+p p+----+ +----+ +----+ | r >> +| | | | | | |o o| | | | | | | i >> +| | f3 | | f2 | | f0 |r CPSW r| f3 | | f2 | | f0 | | v >> +| |tc0 | |tc1 | |tc2 |t t|tc0 | |tc1 | |tc2 | | e >> +| \CBS / \CBS / \CBS /1 2\CBS / \CBS / \CBS / | r >> +| \S / \S / \ / \S / \S / \ / | >> +| \/ \/ \/ \/ \/ \/ | >> ++------------------------------------------------------------------+ >> +========================================Eth==========================> >> + >> +1) >> +// Add 8 tx queues, for interface Eth0, but they are common, so are accessed >> +// by two interfaces Eth0 and Eth1. >> +$ ethtool -L eth1 rx 1 tx 8 >> +rx unmodified, ignoring >> + >> +2) >> +// Check if num of queues is set correctly: >> +$ ethtool -l eth0 >> +Channel parameters for eth0: >> +Pre-set maximums: >> +RX: 8 >> +TX: 8 >> +Other: 0 >> +Combined: 0 >> +Current hardware settings: >> +RX: 1 >> +TX: 8 >> +Other: 0 >> +Combined: 0 >> + >> +3) >> +// TX queues must be rated starting from 0, so set bws for tx0 and tx1 for Eth0 >> +// and for tx2 and tx3 for Eth1. That is, rates 40 and 20 Mb/s appropriately >> +// for Eth0 and 30 and 10 Mb/s for Eth1. >> +// Real speed can differ a bit due to discreetness >> +// Leave last 4 tx queues as not rated >> +$ echo 40 > /sys/class/net/eth0/queues/tx-0/tx_maxrate >> +$ echo 20 > /sys/class/net/eth0/queues/tx-1/tx_maxrate >> +$ echo 30 > /sys/class/net/eth1/queues/tx-2/tx_maxrate >> +$ echo 10 > /sys/class/net/eth1/queues/tx-3/tx_maxrate >> + >> +4) >> +// Check maximum rate of tx (cpdma) queues: >> +$ cat /sys/class/net/eth0/queues/tx-*/tx_maxrate >> +40 >> +20 >> +30 >> +10 >> +0 >> +0 >> +0 >> +0 >> + >> +5) >> +// Map skb->priority to traffic class for Eth0: >> +// 3pri -> tc0, 2pri -> tc1, (0,1,4-7)pri -> tc2 >> +// Map traffic class to transmit queue: >> +// tc0 -> txq0, tc1 -> txq1, tc2 -> (txq4, txq5) >> +$ tc qdisc replace dev eth0 handle 100: parent root mqprio num_tc 3 \ >> +map 2 2 1 0 2 2 2 2 2 2 2 2 2 2 2 2 queues 1@0 1@1 2@4 hw 1 >> + >> +6) >> +// Check classes settings >> +$ tc -g class show dev eth0 >> ++---(100:ffe2) mqprio >> +| +---(100:5) mqprio >> +| +---(100:6) mqprio >> +| >> ++---(100:ffe1) mqprio >> +| +---(100:2) mqprio >> +| >> ++---(100:ffe0) mqprio >> + +---(100:1) mqprio >> + >> +7) >> +// Set rate for class A - 41 Mbit (tc0, txq0) using CBS Qdisc for Eth0 >> +// here only idle slope is important, others ignored >> +// Real speed can differ a bit due to discreetness >> +$ tc qdisc add dev eth0 parent 100:1 cbs locredit -1470 \ >> +hicredit 62 sendslope -959000 idleslope 41000 offload 1 >> +net eth0: set FIFO3 bw = 50 >> + >> +8) >> +// Set rate for class B - 21 Mbit (tc1, txq1) using CBS Qdisc for Eth0 >> +$ tc qdisc add dev eth0 parent 100:2 cbs locredit -1470 \ >> +hicredit 65 sendslope -979000 idleslope 21000 offload 1 >> +net eth0: set FIFO2 bw = 30 >> + >> +9) >> +// Create vlan 100 to map sk->priority to vlan qos for Eth0 >> +$ ip link add link eth0 name eth0.100 type vlan id 100 >> +net eth0: Adding vlanid 100 to vlan filter >> + >> +10) >> +// Map skb->priority to L2 prio for Eth0.100, one to one >> +$ ip link set eth0.100 type vlan \ >> +egress 0:0 1:1 2:2 3:3 4:4 5:5 6:6 7:7 >> + >> +11) >> +// Check egress map for vlan 100 >> +$ cat /proc/net/vlan/eth0.100 >> +[...] >> +INGRESS priority mappings: 0:0 1:0 2:0 3:0 4:0 5:0 6:0 7:0 >> +EGRESS priority mappings: 0:0 1:1 2:2 3:3 4:4 5:5 6:6 7:7 >> + >> +12) >> +// Map skb->priority to traffic class for Eth1: >> +// 3pri -> tc0, 2pri -> tc1, (0,1,4-7)pri -> tc2 >> +// Map traffic class to transmit queue: >> +// tc0 -> txq2, tc1 -> txq3, tc2 -> (txq6, txq7) >> +$ tc qdisc replace dev eth1 handle 100: parent root mqprio num_tc 3 \ >> +map 2 2 1 0 2 2 2 2 2 2 2 2 2 2 2 2 queues 1@2 1@3 2@6 hw 1 >> + >> +13) >> +// Check classes settings >> +$ tc -g class show dev eth1 >> ++---(100:ffe2) mqprio >> +| +---(100:7) mqprio >> +| +---(100:8) mqprio >> +| >> ++---(100:ffe1) mqprio >> +| +---(100:4) mqprio >> +| >> ++---(100:ffe0) mqprio >> + +---(100:3) mqprio >> + >> +14) >> +// Set rate for class A - 31 Mbit (tc0, txq2) using CBS Qdisc for Eth1 >> +// here only idle slope is important, others ignored >> +// Set it +1 Mb for reserve (important!) >> +$ tc qdisc add dev eth1 parent 100:3 cbs locredit -1453 \ >> +hicredit 47 sendslope -969000 idleslope 31000 offload 1 >> +net eth1: set FIFO3 bw = 31 >> + >> +15) >> +// Set rate for class B - 11 Mbit (tc1, txq3) using CBS Qdisc for Eth1 >> +// Set it +1 Mb for reserve (important!) >> +$ tc qdisc add dev eth1 parent 100:4 cbs locredit -1483 \ >> +hicredit 34 sendslope -989000 idleslope 11000 offload 1 >> +net eth1: set FIFO2 bw = 11 >> + >> +16) >> +// Create vlan 100 to map sk->priority to vlan qos for Eth1 >> +$ ip link add link eth1 name eth1.100 type vlan id 100 >> +net eth1: Adding vlanid 100 to vlan filter >> + >> +17) >> +// Map skb->priority to L2 prio for Eth1.100, one to one >> +$ ip link set eth1.100 type vlan \ >> +egress 0:0 1:1 2:2 3:3 4:4 5:5 6:6 7:7 >> + >> +18) >> +// Check egress map for vlan 100 >> +$ cat /proc/net/vlan/eth1.100 >> +[...] >> +INGRESS priority mappings: 0:0 1:0 2:0 3:0 4:0 5:0 6:0 7:0 >> +EGRESS priority mappings: 0:0 1:1 2:2 3:3 4:4 5:5 6:6 7:7 >> + >> +19) >> +// Run appropriate tools with socket option "SO_PRIORITY" to 3 >> +// for class A and to 2 for class B. For both interfaces >> +./tsn_talker -d 18:03:73:66:87:42 -i eth0.100 -p2 -s 1500& >> +./tsn_talker -d 18:03:73:66:87:42 -i eth0.100 -p3 -s 1500& >> +./tsn_talker -d 20:cf:30:85:7d:fd -i eth1.100 -p2 -s 1500& >> +./tsn_talker -d 20:cf:30:85:7d:fd -i eth1.100 -p3 -s 1500& >> + >> +20) >> +// run your listener on workstation (should be in same vlan) >> +// (I took at https://www.spinics.net/lists/netdev/msg460869.html) >> +./tsn_listener -d 18:03:73:66:87:42 -i enp5s0 -s 1500 >> +Receiving data rate: 39012 kbps >> +Receiving data rate: 39012 kbps >> +Receiving data rate: 39012 kbps >> +Receiving data rate: 39012 kbps >> +Receiving data rate: 39012 kbps >> +Receiving data rate: 39012 kbps >> +Receiving data rate: 39012 kbps >> +Receiving data rate: 39012 kbps >> +Receiving data rate: 39012 kbps >> +Receiving data rate: 39012 kbps >> +Receiving data rate: 39012 kbps >> +Receiving data rate: 39012 kbps >> +Receiving data rate: 39000 kbps >> + >> +21) >> +// Restore default configuration if needed >> +$ ip link del eth1.100 >> +$ ip link del eth0.100 >> +$ tc qdisc del dev eth1 root >> +net eth1: Prev FIFO2 is shaped >> +net eth1: set FIFO3 bw = 0 >> +net eth1: set FIFO2 bw = 0 >> +$ tc qdisc del dev eth0 root >> +net eth0: Prev FIFO2 is shaped >> +net eth0: set FIFO3 bw = 0 >> +net eth0: set FIFO2 bw = 0 >> +$ ethtool -L eth0 rx 1 tx 1 >> -- >> 2.17.1 >> -- Regards, Ivan Khoronzhuk
diff --git a/Documentation/networking/ti-cpsw.txt b/Documentation/networking/ti-cpsw.txt new file mode 100644 index 000000000000..1e840346cae1 --- /dev/null +++ b/Documentation/networking/ti-cpsw.txt @@ -0,0 +1,540 @@ +* Texas Instruments CPSW ethernet driver + +Multiqueue & CBS & MQPRIO +===================================================================== +===================================================================== + +The cpsw has 3 CBS shapers for each external ports. This document +describes MQPRIO and CBS Qdisc offload configuration for cpsw driver +based on examples. It potentially can be used in audio video bridging +(AVB) and time sensitive networking (TSN). + +The following examples was tested on AM572x EVM and BBB boards. + +Test setup +========== + +Under consideration two examples with AM52xx EVM running cpsw driver +in dual_emac mode. + +Several prerequisites: +- TX queues must be rated starting from txq0 that has highest priority +- Traffic classes are used starting from 0, that has highest priority +- CBS shapers should be used with rated queues +- The bandwidth for CBS shapers has to be set a little bit more then + potential incoming rate, thus, rate of all incoming tx queues has + to be a little less +- Real rates can differ, due to discreetness +- Map skb-priority to txq is not enough, also skb-priority to l2 prio + map has to be created with ip or vconfig tool +- Any l2/socket prio (0 - 7) for classes can be used, but for + simplicity default values are used: 3 and 2 +- only 2 classes tested: A and B, but checked and can work with more, + maximum allowed 4, but only for 3 rate can be set. + +Test setup for examples +======================= + +-------------------------------+ + |--+ | + | | Workstation0 | + |E | MAC 18:03:73:66:87:42 | ++-----------------------------+ +--|t | | +| | 1 | E | | |h |./tsn_listener -d \ | +| Target board: | 0 | t |--+ |0 | 18:03:73:66:87:42 -i eth0 \| +| AM572x EVM | 0 | h | | | -s 1500 | +| | 0 | 0 | |--+ | +| Only 2 classes: |Mb +---| +-------------------------------+ +| class A, class B | | +| | +---| +-------------------------------+ +| | 1 | E | |--+ | +| | 0 | t | | | Workstation1 | +| | 0 | h |--+ |E | MAC 20:cf:30:85:7d:fd | +| |Mb | 1 | +--|t | | ++-----------------------------+ |h |./tsn_listener -d \ | + |0 | 20:cf:30:85:7d:fd -i eth0 \| + | | -s 1500 | + |--+ | + +-------------------------------+ + +********************************************************************* +********************************************************************* +********************************************************************* +Example 1: One port tx AVB configuration scheme for target board +---------------------------------------------------------------------- +(prints and scheme for AM52xx evm, applicable for single port boards) + +tc - traffic class +txq - transmit queue +p - priority +f - fifo (cpsw fifo) +S - shaper configured + ++------------------------------------------------------------------+ u +| +---------------+ +---------------+ +------+ +------+ | s +| | | | | | | | | | e +| | App 1 | | App 2 | | Apps | | Apps | | r +| | Class A | | Class B | | Rest | | Rest | | +| | Eth0 | | Eth0 | | Eth0 | | Eth1 | | s +| | VLAN100 | | VLAN100 | | | | | | | | p +| | 40 Mb/s | | 20 Mb/s | | | | | | | | a +| | SO_PRIORITY=3 | | SO_PRIORITY=2 | | | | | | | | c +| | | | | | | | | | | | | | e +| +---|-----------+ +---|-----------+ +---|--+ +---|--+ | ++-----|------------------|------------------|--------|-------------+ + +-+ +------------+ | | + | | +-----------------+ +--+ + | | | | ++---|-------|-------------|-----------------------|----------------+ +| +----+ +----+ +----+ +----+ +----+ | +| | p3 | | p2 | | p1 | | p0 | | p0 | | k +| \ / \ / \ / \ / \ / | e +| \ / \ / \ / \ / \ / | r +| \/ \/ \/ \/ \/ | n +| | | | | | e +| | | +-----+ | | l +| | | | | | +| +----+ +----+ +----+ +----+ | s +| |tc0 | |tc1 | |tc2 | |tc0 | | p +| \ / \ / \ / \ / | a +| \ / \ / \ / \ / | c +| \/ \/ \/ \/ | e +| | | +-----+ | | +| | | | | | | +| | | | | | | +| | | | | | | +| +----+ +----+ +----+ +----+ +----+ | +| |txq0| |txq1| |txq2| |txq3| |txq4| | +| \ / \ / \ / \ / \ / | +| \ / \ / \ / \ / \ / | +| \/ \/ \/ \/ \/ | +| +-|------|------|------|--+ +--|--------------+ | +| | | | | | | Eth0.100 | | Eth1 | | ++---|------|------|------|------------------------|----------------+ + | | | | | + p p p p | + 3 2 0-1, 4-7 <- L2 priority | + | | | | | + | | | | | ++---|------|------|------|------------------------|----------------+ +| | | | | |----------+ | +| +----+ +----+ +----+ +----+ +----+ | +| |dma7| |dma6| |dma5| |dma4| |dma3| | +| \ / \ / \ / \ / \ / | c +| \S / \S / \ / \ / \ / | p +| \/ \/ \/ \/ \/ | s +| | | | +----- | | w +| | | | | | | +| | | | | | | d +| +----+ +----+ +----+p p+----+ | r +| | | | | | |o o| | | i +| | f3 | | f2 | | f0 |r r| f0 | | v +| |tc0 | |tc1 | |tc2 |t t|tc0 | | e +| \CBS / \CBS / \CBS /1 2\CBS / | r +| \S / \S / \ / \ / | +| \/ \/ \/ \/ | ++------------------------------------------------------------------+ +========================================Eth==========================> + +1) +// Add 4 tx queues, for interface Eth0, and 1 tx queue for Eth1 +$ ethtool -L eth0 rx 1 tx 5 +rx unmodified, ignoring + +2) +// Check if num of queues is set correctly: +$ ethtool -l eth0 +Channel parameters for eth0: +Pre-set maximums: +RX: 8 +TX: 8 +Other: 0 +Combined: 0 +Current hardware settings: +RX: 1 +TX: 5 +Other: 0 +Combined: 0 + +3) +// TX queues must be rated starting from 0, so set bws for tx0 and tx1 +// Set rates 40 and 20 Mb/s appropriately. +// Pay attention, real speed can differ a bit due to discreetness. +// Leave last 2 tx queues not rated. +$ echo 40 > /sys/class/net/eth0/queues/tx-0/tx_maxrate +$ echo 20 > /sys/class/net/eth0/queues/tx-1/tx_maxrate + +4) +// Check maximum rate of tx (cpdma) queues: +$ cat /sys/class/net/eth0/queues/tx-*/tx_maxrate +40 +20 +0 +0 +0 + +5) +// Map skb->priority to traffic class: +// 3pri -> tc0, 2pri -> tc1, (0,1,4-7)pri -> tc2 +// Map traffic class to transmit queue: +// tc0 -> txq0, tc1 -> txq1, tc2 -> (txq2, txq3) +$ tc qdisc replace dev eth0 handle 100: parent root mqprio num_tc 3 \ +map 2 2 1 0 2 2 2 2 2 2 2 2 2 2 2 2 queues 1@0 1@1 2@2 hw 1 + +5a) +// As two interface sharing same set of tx queues, assign all traffic +// coming to interface Eth1 to separate queue in order to not mix it +// with traffic from interface Eth0, so use separate txq to send +// packets to Eth1, so all prio -> tc0 and tc0 -> txq4 +// Here hw 0, so here still default configuration for eth1 in hw +$ tc qdisc replace dev eth1 handle 100: parent root mqprio num_tc 1 \ +map 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 queues 1@4 hw 0 + +6) +// Check classes settings +$ tc -g class show dev eth0 ++---(100:ffe2) mqprio +| +---(100:3) mqprio +| +---(100:4) mqprio +| ++---(100:ffe1) mqprio +| +---(100:2) mqprio +| ++---(100:ffe0) mqprio + +---(100:1) mqprio + +$ tc -g class show dev eth1 ++---(100:ffe0) mqprio + +---(100:5) mqprio + +7) +// Set rate for class A - 41 Mbit (tc0, txq0) using CBS Qdisc +// Set it +1 Mb for reserve (important!) +// here only idle slope is important, others arg are ignored +// Pay attention, real speed can differ a bit due to discreetness +$ tc qdisc add dev eth0 parent 100:1 cbs locredit -1438 \ +hicredit 62 sendslope -959000 idleslope 41000 offload 1 +net eth0: set FIFO3 bw = 50 + +8) +// Set rate for class B - 21 Mbit (tc1, txq1) using CBS Qdisc: +// Set it +1 Mb for reserve (important!) +$ tc qdisc add dev eth0 parent 100:2 cbs locredit -1468 \ +hicredit 65 sendslope -979000 idleslope 21000 offload 1 +net eth0: set FIFO2 bw = 30 + +9) +// Create vlan 100 to map sk->priority to vlan qos +$ ip link add link eth0 name eth0.100 type vlan id 100 +8021q: 802.1Q VLAN Support v1.8 +8021q: adding VLAN 0 to HW filter on device eth0 +8021q: adding VLAN 0 to HW filter on device eth1 +net eth0: Adding vlanid 100 to vlan filter + +10) +// Map skb->priority to L2 prio, 1 to 1 +$ ip link set eth0.100 type vlan \ +egress 0:0 1:1 2:2 3:3 4:4 5:5 6:6 7:7 + +11) +// Check egress map for vlan 100 +$ cat /proc/net/vlan/eth0.100 +[...] +INGRESS priority mappings: 0:0 1:0 2:0 3:0 4:0 5:0 6:0 7:0 +EGRESS priority mappings: 0:0 1:1 2:2 3:3 4:4 5:5 6:6 7:7 + +12) +// Run your appropriate tools with socket option "SO_PRIORITY" +// to 3 for class A and/or to 2 for class B +// (I took at https://www.spinics.net/lists/netdev/msg460869.html) +./tsn_talker -d 18:03:73:66:87:42 -i eth0.100 -p3 -s 1500& +./tsn_talker -d 18:03:73:66:87:42 -i eth0.100 -p2 -s 1500& + +13) +// run your listener on workstation (should be in same vlan) +// (I took at https://www.spinics.net/lists/netdev/msg460869.html) +./tsn_listener -d 18:03:73:66:87:42 -i enp5s0 -s 1500 +Receiving data rate: 39012 kbps +Receiving data rate: 39012 kbps +Receiving data rate: 39012 kbps +Receiving data rate: 39012 kbps +Receiving data rate: 39012 kbps +Receiving data rate: 39012 kbps +Receiving data rate: 39012 kbps +Receiving data rate: 39012 kbps +Receiving data rate: 39012 kbps +Receiving data rate: 39012 kbps +Receiving data rate: 39012 kbps +Receiving data rate: 39012 kbps +Receiving data rate: 39000 kbps + +14) +// Restore default configuration if needed +$ ip link del eth0.100 +$ tc qdisc del dev eth1 root +$ tc qdisc del dev eth0 root +net eth0: Prev FIFO2 is shaped +net eth0: set FIFO3 bw = 0 +net eth0: set FIFO2 bw = 0 +$ ethtool -L eth0 rx 1 tx 1 + +********************************************************************* +********************************************************************* +********************************************************************* +Example 2: Two port tx AVB configuration scheme for target board +---------------------------------------------------------------------- +(prints and scheme for AM52xx evm, for dual emac boards only) + ++------------------------------------------------------------------+ u +| +----------+ +----------+ +------+ +----------+ +----------+ | s +| | | | | | | | | | | | e +| | App 1 | | App 2 | | Apps | | App 3 | | App 4 | | r +| | Class A | | Class B | | Rest | | Class B | | Class A | | +| | Eth0 | | Eth0 | | | | | Eth1 | | Eth1 | | s +| | VLAN100 | | VLAN100 | | | | | VLAN100 | | VLAN100 | | p +| | 40 Mb/s | | 20 Mb/s | | | | | 10 Mb/s | | 30 Mb/s | | a +| | SO_PRI=3 | | SO_PRI=2 | | | | | SO_PRI=3 | | SO_PRI=2 | | c +| | | | | | | | | | | | | | | | | e +| +---|------+ +---|------+ +---|--+ +---|------+ +---|------+ | ++-----|-------------|-------------|---------|-------------|--------+ + +-+ +-------+ | +----------+ +----+ + | | +-------+------+ | | + | | | | | | ++---|-------|-------------|--------------|-------------|-------|---+ +| +----+ +----+ +----+ +----+ +----+ +----+ +----+ +----+ | +| | p3 | | p2 | | p1 | | p0 | | p0 | | p1 | | p2 | | p3 | | k +| \ / \ / \ / \ / \ / \ / \ / \ / | e +| \ / \ / \ / \ / \ / \ / \ / \ / | r +| \/ \/ \/ \/ \/ \/ \/ \/ | n +| | | | | | | | e +| | | +----+ +----+ | | | l +| | | | | | | | +| +----+ +----+ +----+ +----+ +----+ +----+ | s +| |tc0 | |tc1 | |tc2 | |tc2 | |tc1 | |tc0 | | p +| \ / \ / \ / \ / \ / \ / | a +| \ / \ / \ / \ / \ / \ / | c +| \/ \/ \/ \/ \/ \/ | e +| | | +-----+ +-----+ | | | +| | | | | | | | | | +| | | | | | | | | | +| | | | | E E | | | | | +| +----+ +----+ +----+ +----+ t t +----+ +----+ +----+ +----+ | +| |txq0| |txq1| |txq4| |txq5| h h |txq6| |txq7| |txq3| |txq2| | +| \ / \ / \ / \ / 0 1 \ / \ / \ / \ / | +| \ / \ / \ / \ / . . \ / \ / \ / \ / | +| \/ \/ \/ \/ 1 1 \/ \/ \/ \/ | +| +-|------|------|------|--+ 0 0 +-|------|------|------|--+ | +| | | | | | | 0 0 | | | | | | | ++---|------|------|------|---------------|------|------|------|----+ + | | | | | | | | + p p p p p p p p + 3 2 0-1, 4-7 <-L2 pri-> 0-1, 4-7 2 3 + | | | | | | | | + | | | | | | | | ++---|------|------|------|---------------|------|------|------|----+ +| | | | | | | | | | +| +----+ +----+ +----+ +----+ +----+ +----+ +----+ +----+ | +| |dma7| |dma6| |dma3| |dma2| |dma1| |dma0| |dma4| |dma5| | +| \ / \ / \ / \ / \ / \ / \ / \ / | c +| \S / \S / \ / \ / \ / \ / \S / \S / | p +| \/ \/ \/ \/ \/ \/ \/ \/ | s +| | | | +----- | | | | | w +| | | | | +----+ | | | | +| | | | | | | | | | d +| +----+ +----+ +----+p p+----+ +----+ +----+ | r +| | | | | | |o o| | | | | | | i +| | f3 | | f2 | | f0 |r CPSW r| f3 | | f2 | | f0 | | v +| |tc0 | |tc1 | |tc2 |t t|tc0 | |tc1 | |tc2 | | e +| \CBS / \CBS / \CBS /1 2\CBS / \CBS / \CBS / | r +| \S / \S / \ / \S / \S / \ / | +| \/ \/ \/ \/ \/ \/ | ++------------------------------------------------------------------+ +========================================Eth==========================> + +1) +// Add 8 tx queues, for interface Eth0, but they are common, so are accessed +// by two interfaces Eth0 and Eth1. +$ ethtool -L eth1 rx 1 tx 8 +rx unmodified, ignoring + +2) +// Check if num of queues is set correctly: +$ ethtool -l eth0 +Channel parameters for eth0: +Pre-set maximums: +RX: 8 +TX: 8 +Other: 0 +Combined: 0 +Current hardware settings: +RX: 1 +TX: 8 +Other: 0 +Combined: 0 + +3) +// TX queues must be rated starting from 0, so set bws for tx0 and tx1 for Eth0 +// and for tx2 and tx3 for Eth1. That is, rates 40 and 20 Mb/s appropriately +// for Eth0 and 30 and 10 Mb/s for Eth1. +// Real speed can differ a bit due to discreetness +// Leave last 4 tx queues as not rated +$ echo 40 > /sys/class/net/eth0/queues/tx-0/tx_maxrate +$ echo 20 > /sys/class/net/eth0/queues/tx-1/tx_maxrate +$ echo 30 > /sys/class/net/eth1/queues/tx-2/tx_maxrate +$ echo 10 > /sys/class/net/eth1/queues/tx-3/tx_maxrate + +4) +// Check maximum rate of tx (cpdma) queues: +$ cat /sys/class/net/eth0/queues/tx-*/tx_maxrate +40 +20 +30 +10 +0 +0 +0 +0 + +5) +// Map skb->priority to traffic class for Eth0: +// 3pri -> tc0, 2pri -> tc1, (0,1,4-7)pri -> tc2 +// Map traffic class to transmit queue: +// tc0 -> txq0, tc1 -> txq1, tc2 -> (txq4, txq5) +$ tc qdisc replace dev eth0 handle 100: parent root mqprio num_tc 3 \ +map 2 2 1 0 2 2 2 2 2 2 2 2 2 2 2 2 queues 1@0 1@1 2@4 hw 1 + +6) +// Check classes settings +$ tc -g class show dev eth0 ++---(100:ffe2) mqprio +| +---(100:5) mqprio +| +---(100:6) mqprio +| ++---(100:ffe1) mqprio +| +---(100:2) mqprio +| ++---(100:ffe0) mqprio + +---(100:1) mqprio + +7) +// Set rate for class A - 41 Mbit (tc0, txq0) using CBS Qdisc for Eth0 +// here only idle slope is important, others ignored +// Real speed can differ a bit due to discreetness +$ tc qdisc add dev eth0 parent 100:1 cbs locredit -1470 \ +hicredit 62 sendslope -959000 idleslope 41000 offload 1 +net eth0: set FIFO3 bw = 50 + +8) +// Set rate for class B - 21 Mbit (tc1, txq1) using CBS Qdisc for Eth0 +$ tc qdisc add dev eth0 parent 100:2 cbs locredit -1470 \ +hicredit 65 sendslope -979000 idleslope 21000 offload 1 +net eth0: set FIFO2 bw = 30 + +9) +// Create vlan 100 to map sk->priority to vlan qos for Eth0 +$ ip link add link eth0 name eth0.100 type vlan id 100 +net eth0: Adding vlanid 100 to vlan filter + +10) +// Map skb->priority to L2 prio for Eth0.100, one to one +$ ip link set eth0.100 type vlan \ +egress 0:0 1:1 2:2 3:3 4:4 5:5 6:6 7:7 + +11) +// Check egress map for vlan 100 +$ cat /proc/net/vlan/eth0.100 +[...] +INGRESS priority mappings: 0:0 1:0 2:0 3:0 4:0 5:0 6:0 7:0 +EGRESS priority mappings: 0:0 1:1 2:2 3:3 4:4 5:5 6:6 7:7 + +12) +// Map skb->priority to traffic class for Eth1: +// 3pri -> tc0, 2pri -> tc1, (0,1,4-7)pri -> tc2 +// Map traffic class to transmit queue: +// tc0 -> txq2, tc1 -> txq3, tc2 -> (txq6, txq7) +$ tc qdisc replace dev eth1 handle 100: parent root mqprio num_tc 3 \ +map 2 2 1 0 2 2 2 2 2 2 2 2 2 2 2 2 queues 1@2 1@3 2@6 hw 1 + +13) +// Check classes settings +$ tc -g class show dev eth1 ++---(100:ffe2) mqprio +| +---(100:7) mqprio +| +---(100:8) mqprio +| ++---(100:ffe1) mqprio +| +---(100:4) mqprio +| ++---(100:ffe0) mqprio + +---(100:3) mqprio + +14) +// Set rate for class A - 31 Mbit (tc0, txq2) using CBS Qdisc for Eth1 +// here only idle slope is important, others ignored +// Set it +1 Mb for reserve (important!) +$ tc qdisc add dev eth1 parent 100:3 cbs locredit -1453 \ +hicredit 47 sendslope -969000 idleslope 31000 offload 1 +net eth1: set FIFO3 bw = 31 + +15) +// Set rate for class B - 11 Mbit (tc1, txq3) using CBS Qdisc for Eth1 +// Set it +1 Mb for reserve (important!) +$ tc qdisc add dev eth1 parent 100:4 cbs locredit -1483 \ +hicredit 34 sendslope -989000 idleslope 11000 offload 1 +net eth1: set FIFO2 bw = 11 + +16) +// Create vlan 100 to map sk->priority to vlan qos for Eth1 +$ ip link add link eth1 name eth1.100 type vlan id 100 +net eth1: Adding vlanid 100 to vlan filter + +17) +// Map skb->priority to L2 prio for Eth1.100, one to one +$ ip link set eth1.100 type vlan \ +egress 0:0 1:1 2:2 3:3 4:4 5:5 6:6 7:7 + +18) +// Check egress map for vlan 100 +$ cat /proc/net/vlan/eth1.100 +[...] +INGRESS priority mappings: 0:0 1:0 2:0 3:0 4:0 5:0 6:0 7:0 +EGRESS priority mappings: 0:0 1:1 2:2 3:3 4:4 5:5 6:6 7:7 + +19) +// Run appropriate tools with socket option "SO_PRIORITY" to 3 +// for class A and to 2 for class B. For both interfaces +./tsn_talker -d 18:03:73:66:87:42 -i eth0.100 -p2 -s 1500& +./tsn_talker -d 18:03:73:66:87:42 -i eth0.100 -p3 -s 1500& +./tsn_talker -d 20:cf:30:85:7d:fd -i eth1.100 -p2 -s 1500& +./tsn_talker -d 20:cf:30:85:7d:fd -i eth1.100 -p3 -s 1500& + +20) +// run your listener on workstation (should be in same vlan) +// (I took at https://www.spinics.net/lists/netdev/msg460869.html) +./tsn_listener -d 18:03:73:66:87:42 -i enp5s0 -s 1500 +Receiving data rate: 39012 kbps +Receiving data rate: 39012 kbps +Receiving data rate: 39012 kbps +Receiving data rate: 39012 kbps +Receiving data rate: 39012 kbps +Receiving data rate: 39012 kbps +Receiving data rate: 39012 kbps +Receiving data rate: 39012 kbps +Receiving data rate: 39012 kbps +Receiving data rate: 39012 kbps +Receiving data rate: 39012 kbps +Receiving data rate: 39012 kbps +Receiving data rate: 39000 kbps + +21) +// Restore default configuration if needed +$ ip link del eth1.100 +$ ip link del eth0.100 +$ tc qdisc del dev eth1 root +net eth1: Prev FIFO2 is shaped +net eth1: set FIFO3 bw = 0 +net eth1: set FIFO2 bw = 0 +$ tc qdisc del dev eth0 root +net eth0: Prev FIFO2 is shaped +net eth0: set FIFO3 bw = 0 +net eth0: set FIFO2 bw = 0 +$ ethtool -L eth0 rx 1 tx 1