diff mbox series

[v7,04/12] migration/dirtyrate: Add dirtyrate statistics series functions

Message ID 1599661096-127913-5-git-send-email-zhengchuan@huawei.com
State Superseded
Headers show
Series *** A Method for evaluating dirty page rate *** | expand

Commit Message

Zheng Chuan Sept. 9, 2020, 2:18 p.m. UTC
Add dirtyrate statistics functions to record/update dirtyrate info.

Signed-off-by: Chuan Zheng <zhengchuan@huawei.com>
---
 migration/dirtyrate.c | 32 ++++++++++++++++++++++++++++++++
 migration/dirtyrate.h | 12 ++++++++++++
 2 files changed, 44 insertions(+)

Comments

Dr. David Alan Gilbert Sept. 10, 2020, 4:27 p.m. UTC | #1
* Chuan Zheng (zhengchuan@huawei.com) wrote:
> Add dirtyrate statistics functions to record/update dirtyrate info.
> 
> Signed-off-by: Chuan Zheng <zhengchuan@huawei.com>

Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>

> ---
>  migration/dirtyrate.c | 32 ++++++++++++++++++++++++++++++++
>  migration/dirtyrate.h | 12 ++++++++++++
>  2 files changed, 44 insertions(+)
> 
> diff --git a/migration/dirtyrate.c b/migration/dirtyrate.c
> index 0a3350a..5911ff0 100644
> --- a/migration/dirtyrate.c
> +++ b/migration/dirtyrate.c
> @@ -23,6 +23,7 @@
>  #include "dirtyrate.h"
>  
>  static int CalculatingState = DIRTY_RATE_STATUS_UNSTARTED;
> +static struct DirtyRateStat DirtyStat;
>  
>  static int dirtyrate_set_state(int *state, int old_state, int new_state)
>  {
> @@ -34,6 +35,37 @@ static int dirtyrate_set_state(int *state, int old_state, int new_state)
>      }
>  }
>  
> +static void reset_dirtyrate_stat(void)
> +{
> +    DirtyStat.total_dirty_samples = 0;
> +    DirtyStat.total_sample_count = 0;
> +    DirtyStat.total_block_mem_MB = 0;
> +    DirtyStat.dirty_rate = 0;
> +    DirtyStat.start_time = 0;
> +    DirtyStat.calc_time = 0;
> +}
> +
> +static void update_dirtyrate_stat(struct RamblockDirtyInfo *info)
> +{
> +    DirtyStat.total_dirty_samples += info->sample_dirty_count;
> +    DirtyStat.total_sample_count += info->sample_pages_count;
> +    /* size of total pages in MB */
> +    DirtyStat.total_block_mem_MB += (info->ramblock_pages *
> +                                     TARGET_PAGE_SIZE) >> 20;
> +}
> +
> +static void update_dirtyrate(uint64_t msec)
> +{
> +    uint64_t dirtyrate;
> +    uint64_t total_dirty_samples = DirtyStat.total_dirty_samples;
> +    uint64_t total_sample_count = DirtyStat.total_sample_count;
> +    uint64_t total_block_mem_MB = DirtyStat.total_block_mem_MB;
> +
> +    dirtyrate = total_dirty_samples * total_block_mem_MB *
> +                1000 / (total_sample_count * msec);
> +
> +    DirtyStat.dirty_rate = dirtyrate;
> +}
>  
>  static void calculate_dirtyrate(struct DirtyRateConfig config)
>  {
> diff --git a/migration/dirtyrate.h b/migration/dirtyrate.h
> index 479e222..a3ee305 100644
> --- a/migration/dirtyrate.h
> +++ b/migration/dirtyrate.h
> @@ -42,6 +42,18 @@ struct RamblockDirtyInfo {
>      uint32_t *hash_result; /* array of hash result for sampled pages */
>  };
>  
> +/*
> + * Store calculation statistics for each measure.
> + */
> +struct DirtyRateStat {
> +    uint64_t total_dirty_samples; /* total dirty sampled page */
> +    uint64_t total_sample_count; /* total sampled pages */
> +    uint64_t total_block_mem_MB; /* size of total sampled pages in MB */
> +    int64_t dirty_rate; /* dirty rate in MB/s */
> +    int64_t start_time; /* calculation start time in units of second */
> +    int64_t calc_time; /* time duration of two sampling in units of second */
> +};
> +
>  void *get_dirtyrate_thread(void *arg);
>  #endif
>  
> -- 
> 1.8.3.1
>
diff mbox series

Patch

diff --git a/migration/dirtyrate.c b/migration/dirtyrate.c
index 0a3350a..5911ff0 100644
--- a/migration/dirtyrate.c
+++ b/migration/dirtyrate.c
@@ -23,6 +23,7 @@ 
 #include "dirtyrate.h"
 
 static int CalculatingState = DIRTY_RATE_STATUS_UNSTARTED;
+static struct DirtyRateStat DirtyStat;
 
 static int dirtyrate_set_state(int *state, int old_state, int new_state)
 {
@@ -34,6 +35,37 @@  static int dirtyrate_set_state(int *state, int old_state, int new_state)
     }
 }
 
+static void reset_dirtyrate_stat(void)
+{
+    DirtyStat.total_dirty_samples = 0;
+    DirtyStat.total_sample_count = 0;
+    DirtyStat.total_block_mem_MB = 0;
+    DirtyStat.dirty_rate = 0;
+    DirtyStat.start_time = 0;
+    DirtyStat.calc_time = 0;
+}
+
+static void update_dirtyrate_stat(struct RamblockDirtyInfo *info)
+{
+    DirtyStat.total_dirty_samples += info->sample_dirty_count;
+    DirtyStat.total_sample_count += info->sample_pages_count;
+    /* size of total pages in MB */
+    DirtyStat.total_block_mem_MB += (info->ramblock_pages *
+                                     TARGET_PAGE_SIZE) >> 20;
+}
+
+static void update_dirtyrate(uint64_t msec)
+{
+    uint64_t dirtyrate;
+    uint64_t total_dirty_samples = DirtyStat.total_dirty_samples;
+    uint64_t total_sample_count = DirtyStat.total_sample_count;
+    uint64_t total_block_mem_MB = DirtyStat.total_block_mem_MB;
+
+    dirtyrate = total_dirty_samples * total_block_mem_MB *
+                1000 / (total_sample_count * msec);
+
+    DirtyStat.dirty_rate = dirtyrate;
+}
 
 static void calculate_dirtyrate(struct DirtyRateConfig config)
 {
diff --git a/migration/dirtyrate.h b/migration/dirtyrate.h
index 479e222..a3ee305 100644
--- a/migration/dirtyrate.h
+++ b/migration/dirtyrate.h
@@ -42,6 +42,18 @@  struct RamblockDirtyInfo {
     uint32_t *hash_result; /* array of hash result for sampled pages */
 };
 
+/*
+ * Store calculation statistics for each measure.
+ */
+struct DirtyRateStat {
+    uint64_t total_dirty_samples; /* total dirty sampled page */
+    uint64_t total_sample_count; /* total sampled pages */
+    uint64_t total_block_mem_MB; /* size of total sampled pages in MB */
+    int64_t dirty_rate; /* dirty rate in MB/s */
+    int64_t start_time; /* calculation start time in units of second */
+    int64_t calc_time; /* time duration of two sampling in units of second */
+};
+
 void *get_dirtyrate_thread(void *arg);
 #endif