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| author | Chuan Zheng <zhengchuan@huawei.com> | 2020-09-16 14:22:04 +0800 |
|---|---|---|
| committer | Dr. David Alan Gilbert <dgilbert@redhat.com> | 2020-09-25 12:45:58 +0100 |
| commit | eca582249c4cd3df2b6ff977e2ff481efb4c8517 (patch) | |
| tree | 5677db7a7cb9a63e50f4c80f157d6205e6a6f042 /migration | |
| parent | f82583cdc05b89e5900e44ceacb6cc85f974b448 (diff) | |
| download | qemu-eca582249c4cd3df2b6ff977e2ff481efb4c8517.zip | |
migration/dirtyrate: Implement set_sample_page_period() and is_sample_period_valid()
Implement is_sample_period_valid() to check if the sample period is vaild and
do set_sample_page_period() to sleep specific time between sample actions.
Signed-off-by: Chuan Zheng <zhengchuan@huawei.com>
Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Reviewed-by: David Edmondson <david.edmondson@oracle.com>
Reviewed-by: Li Qiang <liq3ea@gmail.com>
Message-Id: <1600237327-33618-10-git-send-email-zhengchuan@huawei.com>
Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Diffstat (limited to 'migration')
| -rw-r--r-- | migration/dirtyrate.c | 24 | ||||
| -rw-r--r-- | migration/dirtyrate.h | 6 |
2 files changed, 30 insertions, 0 deletions
diff --git a/migration/dirtyrate.c b/migration/dirtyrate.c index ee47e2bc27..20216c5f09 100644 --- a/migration/dirtyrate.c +++ b/migration/dirtyrate.c @@ -27,6 +27,30 @@ static int CalculatingState = DIRTY_RATE_STATUS_UNSTARTED; static struct DirtyRateStat DirtyStat; +static int64_t set_sample_page_period(int64_t msec, int64_t initial_time) +{ + int64_t current_time; + + current_time = qemu_clock_get_ms(QEMU_CLOCK_REALTIME); + if ((current_time - initial_time) >= msec) { + msec = current_time - initial_time; + } else { + g_usleep((msec + initial_time - current_time) * 1000); + } + + return msec; +} + +static bool is_sample_period_valid(int64_t sec) +{ + if (sec < MIN_FETCH_DIRTYRATE_TIME_SEC || + sec > MAX_FETCH_DIRTYRATE_TIME_SEC) { + return false; + } + + return true; +} + static int dirtyrate_set_state(int *state, int old_state, int new_state) { assert(new_state < DIRTY_RATE_STATUS__MAX); diff --git a/migration/dirtyrate.h b/migration/dirtyrate.h index be5b8ec2b1..6ec429534d 100644 --- a/migration/dirtyrate.h +++ b/migration/dirtyrate.h @@ -29,6 +29,12 @@ */ #define MIN_RAMBLOCK_SIZE 128 +/* + * Take 1s as minimum time for calculation duration + */ +#define MIN_FETCH_DIRTYRATE_TIME_SEC 1 +#define MAX_FETCH_DIRTYRATE_TIME_SEC 60 + struct DirtyRateConfig { uint64_t sample_pages_per_gigabytes; /* sample pages per GB */ int64_t sample_period_seconds; /* time duration between two sampling */ |