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Make flusher_count adaptive and limit write iodepth

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This commit is contained in:
Vitaliy Filippov
2021-02-25 23:59:33 +03:00
parent 00e98f64f3
commit c974cb539c
5 changed files with 36 additions and 4 deletions
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src/blockstore_flush.cpp
+18 -2
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@@ -7,6 +7,8 @@ journal_flusher_t::journal_flusher_t(int flusher_count, blockstore_impl_t *bs)
{
this->bs = bs;
this->flusher_count = flusher_count;
this->cur_flusher_count = 1;
this->target_flusher_count = 1;
dequeuing = false;
trimming = false;
active_flushers = 0;
@@ -68,10 +70,24 @@ bool journal_flusher_t::is_active()
void journal_flusher_t::loop()
{
for (int i = 0; (active_flushers > 0 || dequeuing) && i < flusher_count; i++)
target_flusher_count = bs->write_iodepth*2;
if (target_flusher_count <= 0)
target_flusher_count = 1;
else if (target_flusher_count > flusher_count)
target_flusher_count = flusher_count;
if (target_flusher_count > cur_flusher_count)
cur_flusher_count = target_flusher_count;
else if (target_flusher_count < cur_flusher_count)
{
co[i].loop();
while (target_flusher_count < cur_flusher_count)
{
if (co[cur_flusher_count-1].wait_state)
break;
cur_flusher_count--;
}
}
for (int i = 0; (active_flushers > 0 || dequeuing) && i < cur_flusher_count; i++)
co[i].loop();
}
void journal_flusher_t::enqueue_flush(obj_ver_id ov)