osd/OSD: wakeup all threads of shard.

In our test(4NVME), we found for 4K randread(8/16 mean shard, 2/1 mean
thread_per_shard):
QD	8_2(IOPS(k))	16_1(IOPS(K))	8_2(apply patch)
32	 191		 263		 263.5

Signed-off-by: Jianpeng Ma <jianpeng.ma@intel.com>

diff --git a/src/osd/OSD.cc b/src/osd/OSD.cc
index 133ebb984b2574d5f993c6035af81644daa80a39..23e918a73c8682ae688a915522fe4e2fb5040cf7 100644 (file)
--- a/src/osd/OSD.cc
+++ b/src/osd/OSD.cc
@@ -10728,7 +10728,7 @@ void OSD::ShardedOpWQ::_enqueue(OpSchedulerItem&& item) {
 
   if (empty) {
     std::lock_guard l{sdata->sdata_wait_lock};
-    sdata->sdata_cond.notify_one();
+    sdata->sdata_cond.notify_all();
   }
 }