performance between ceph-osd and crimson-osd

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Hi,

I measured the performance of ceph-osd and crimson-osd with same single
core affinity.
I checked IOPS, Latency by rados-bench write , and crimson-osd has lower
performance than ceph-osd about 3 times. (ceph-osd(BlueStore): 228 IOPS,
crimson-osd(AlienStore): 73 IOPS)
-> " $ rados bench -p rbd 10 write --no-cleanup "

Then, crimson-osd's CPU utilization is almost 100%.
I think this is the reason of performance degradation..

Crimson-osd is known for lower CPU consumption than ceph-osd.
I wonder why crimson-osd has more CPU usage in this experiment.

Please let me know how to fix it,

Shin
ᐧ
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