Latency Improvement Report for ShardedOpWQ

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===== Test Purpose =====

Measure whether and how much Sharded OpWQ is better than Traditional
OpWQ for random write scene.

===== Test Case =====

4K Object WriteFull for 1w times.

===== Test Method =====

Put the following static probes into codes when running tests to get
the time span between enqeueue and dequeue of OpWQ.

Start: PG::enqueue_op before osd->op_wq.equeue call
End: OSD::dequeue_op.entry

===== Test Result =====

Traditional OpWQ: 109us(AVG), 40us(MIN)
ShardedOpWQ: 97us(AVG), 32us(MIN)

===== Test Conclusion =====

No Remarkably Improvement for Latency


-- 
Dong Yuan
Email:yuandong1222@xxxxxxxxx
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