/* Slab rebalancer thread.
* Does not use spinlocks since it is not timing sensitive. Burn less CPU and
* go to sleep if locks are contended
*/
static void *slab_maintenance_thread(void *arg) {
int was_busy = 0;
int src, dest;
while (do_run_slab_thread) {
if (slab_rebalance_signal == 1) {
if (slab_rebalance_start() < 0) {
/* Handle errors with more specifity as required. */
slab_rebalance_signal = 0;
}
} else if (slab_rebalance_signal && slab_rebal.slab_start != NULL) {
/* If we have a decision to continue, continue it */
was_busy = slab_rebalance_move();
} else if (settings.slab_automove && slab_automove_decision(&src, &dest) == 1) {
/* Blind to the return codes. It will retry on its own */
slabs_reassign(src, dest);
}
if (slab_rebal.done) {
slab_rebalance_finish();
}
/* Sleep a bit if no work to do, or waiting on busy objects */
if (was_busy || !slab_rebalance_signal)
sleep(1);
}
return NULL;
}
/* Slab rebalancer thread.
* Does not use spinlocks since it is not timing sensitive. Burn less CPU and
* go to sleep if locks are contended
*/
static void *slab_maintenance_thread(void *arg) {
int src, dest;
while (do_run_slab_thread) {
if (settings.slab_automove == 1) {
if (slab_automove_decision(&src, &dest) == 1) {
/* Blind to the return codes. It will retry on its own */
slabs_reassign(src, dest);
}
sleep(1);
} else {
/* Don't wake as often if we're not enabled.
* This is lazier than setting up a condition right now. */
sleep(5);
}
}
return NULL;
}
/* Slab rebalancer thread.
* Does not use spinlocks since it is not timing sensitive. Burn less CPU and
* go to sleep if locks are contended
*/
static void *slab_maintenance_thread(void *arg)
{
int src, dest; //src是失败次数很少，或者很平均的那个slab-class id，dest是那些分配失败次数骤增的slab-class id
while (do_run_slab_thread)
{
if (settings.slab_automove == 1)//如果是前面的激烈模式,slab_automove=2,就不用该线程去选择移动的slab，每次失败主动会去移动那些slab
{
if (slab_automove_decision(&src, &dest) == 1)//这里是具体的选择src和dest的处理函数
{
/* Blind to the return codes. It will retry on its own */
slabs_reassign(src, dest);
}
sleep(1);
}
else
{
/* Don't wake as often if we're not enabled.
* This is lazier than setting up a condition right now. */
sleep(5);
}
}
return NULL;
}
