[RFC] arm64: make Timer Interrupt Frequency selectable

Message ID 1445831296-7020-1-git-send-email-wangkefeng.wang@huawei.com
State New
Headers show

Commit Message

Kefeng Wang Oct. 26, 2015, 3:48 a.m.
It allows a selectable timer interrupt frequency of 100, 250, 300 and 1000 HZ.
We will get better performance when choose a suitable frequency in some scene.

Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will.deacon@arm.com>
Signed-off-by: Kefeng Wang <wangkefeng.wang@huawei.com>

---
 arch/arm64/Kconfig | 5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

-- 
1.7.12.4



_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

Comments

Catalin Marinas Oct. 28, 2015, 6:50 p.m. | #1
On Mon, Oct 26, 2015 at 11:48:16AM +0800, Kefeng Wang wrote:
> It allows a selectable timer interrupt frequency of 100, 250, 300 and 1000 HZ.

> We will get better performance when choose a suitable frequency in some scene.

> 

> Cc: Catalin Marinas <catalin.marinas@arm.com>

> Cc: Will Deacon <will.deacon@arm.com>

> Signed-off-by: Kefeng Wang <wangkefeng.wang@huawei.com>


Queued for 4.4. Thanks.

-- 
Catalin

_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

Patch

diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
index 07d1811..4a07d89 100644
--- a/arch/arm64/Kconfig
+++ b/arch/arm64/Kconfig
@@ -432,10 +432,7 @@  config HOTPLUG_CPU
 	  can be controlled through /sys/devices/system/cpu.
 
 source kernel/Kconfig.preempt
-
-config HZ
-	int
-	default 100
+source kernel/Kconfig.hz
 
 config ARCH_HAS_HOLES_MEMORYMODEL
 	def_bool y if SPARSEMEM