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migration/dirtyrate: add DirtyRateStatus to denote calculation status

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add DirtyRateStatus to denote calculating status.

Signed-off-by: Chuan Zheng <zhengchuan@huawei.com>
Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Reviewed-by: Li Qiang <liq3ea@gmail.com>
Message-Id: <1600237327-33618-3-git-send-email-zhengchuan@huawei.com>
Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
  atomic name fixup
This commit is contained in:
Chuan Zheng 2020-09-16 14:21:57 +08:00 • committed by Dr. David Alan Gilbert
parent 4240dceeb3
commit 7df3aa3083
2 changed files with 43 additions and 0 deletions
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26
migration/dirtyrate.c
View file

@ -22,6 +22,19 @@
#include "migration.h"
#include "dirtyrate.h"
static int CalculatingState = DIRTY_RATE_STATUS_UNSTARTED;
static int dirtyrate_set_state(int *state, int old_state, int new_state)
{
assert(new_state < DIRTY_RATE_STATUS__MAX);
if (qatomic_cmpxchg(state, old_state, new_state) == old_state) {
return 0;
} else {
return -1;
}
}
static void calculate_dirtyrate(struct DirtyRateConfig config)
{
/* todo */
@ -31,8 +44,21 @@ static void calculate_dirtyrate(struct DirtyRateConfig config)
void *get_dirtyrate_thread(void *arg)
{
struct DirtyRateConfig config = *(struct DirtyRateConfig *)arg;
int ret;
ret = dirtyrate_set_state(&CalculatingState, DIRTY_RATE_STATUS_UNSTARTED,
DIRTY_RATE_STATUS_MEASURING);
if (ret == -1) {
error_report("change dirtyrate state failed.");
return NULL;
}
calculate_dirtyrate(config);
ret = dirtyrate_set_state(&CalculatingState, DIRTY_RATE_STATUS_MEASURING,
DIRTY_RATE_STATUS_MEASURED);
if (ret == -1) {
error_report("change dirtyrate state failed.");
}
return NULL;
}