| Message ID | 1600137887-58739-5-git-send-email-zhengchuan@huawei.com |
|---|---|
| State | Superseded |
| Headers | show |
| Series | *** A Method for evaluating dirty page rate *** | expand |
Chuan Zheng <zhengchuan@huawei.com> 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 <zhengchuan@huawei.com> > Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com> Reviewed-by: Li Qiang <liq3ea@gmail.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 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 >
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