Chuan Zheng 于2020年9月15日周二 上午10:34写道：
>
> Add dirtyrate statistics functions to record/update dirtyrate info.
>
> Signed-off-by: Chuan Zheng
> Reviewed-by: Dr. David Alan Gilbert
Reviewed-by: Li Qiang
> ---
> migration/dirtyrate.c | 32
> migration/dirtyrate.h | 12
> 2 files changed, 44 insertions(+)
>
> diff --git a/migration/dirtyrate.c b/migration/dirtyrate.c
> index 7bea8ff..ab372ba 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 = -1;
> +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
>
