diff --git a/migration-dirtyrate-Implement-set_sample_page_period.patch b/migration-dirtyrate-Implement-set_sample_page_period.patch new file mode 100644 index 0000000..fdb9c22 --- /dev/null +++ b/migration-dirtyrate-Implement-set_sample_page_period.patch @@ -0,0 +1,75 @@ +From 905082a502e0600d40e784df2443ae99948cf52d Mon Sep 17 00:00:00 2001 +From: Chuan Zheng +Date: Wed, 16 Sep 2020 14:22:04 +0800 +Subject: [PATCH] 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 +Reviewed-by: Dr. David Alan Gilbert +Reviewed-by: David Edmondson +Reviewed-by: Li Qiang +Message-Id: <1600237327-33618-10-git-send-email-zhengchuan@huawei.com> +Signed-off-by: Dr. David Alan Gilbert +--- + migration/dirtyrate.c | 24 ++++++++++++++++++++++++ + migration/dirtyrate.h | 6 ++++++ + 2 files changed, 30 insertions(+) + +diff --git a/migration/dirtyrate.c b/migration/dirtyrate.c +index 97bb883850..485d6467c9 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 */ +-- +2.27.0 +