Cameron Harr wrote:
I tried with the latest scst and srpt as of this morning. Previously,
I had used srpt-1.0.0. The following results are with BLOCKIO, and
I'll have a NULLIO in a bit. You can see from here that I don't hang
any more, but the srpt thread=0 are a little lower.
As before this run was done with ioengine=libaio and iodepth=16. I
pretty much always get significantly better performance with libaio
than with sync or other engines. Also, the iodepth setting tended to
give me better results.
----------------------------------------------
type=randwrite bs=512 drives=1 scst_threads=1 srptthread=1
iops=67073.48
type=randwrite bs=4k drives=1 scst_threads=1 srptthread=1
iops=54876.82
type=randwrite bs=512 drives=2 scst_threads=1 srptthread=1
iops=74858.00
type=randwrite bs=4k drives=2 scst_threads=1 srptthread=1
iops=75357.15
type=randwrite bs=512 drives=3 scst_threads=1 srptthread=1
iops=83257.72
type=randwrite bs=4k drives=3 scst_threads=1 srptthread=1
iops=82186.79
type=randwrite bs=512 drives=1 scst_threads=2 srptthread=1
iops=59908.06
type=randwrite bs=4k drives=1 scst_threads=2 srptthread=1
iops=50982.91
type=randwrite bs=512 drives=2 scst_threads=2 srptthread=1
iops=99243.07
type=randwrite bs=4k drives=2 scst_threads=2 srptthread=1
iops=79670.62
type=randwrite bs=512 drives=3 scst_threads=2 srptthread=1
iops=102898.37
type=randwrite bs=4k drives=3 scst_threads=2 srptthread=1
iops=92248.25
type=randwrite bs=512 drives=1 scst_threads=3 srptthread=1
iops=63086.77
type=randwrite bs=4k drives=1 scst_threads=3 srptthread=1
iops=53020.41
type=randwrite bs=512 drives=2 scst_threads=3 srptthread=1
iops=95990.06
type=randwrite bs=4k drives=2 scst_threads=3 srptthread=1
iops=77487.26
type=randwrite bs=512 drives=3 scst_threads=3 srptthread=1
iops=105945.85
type=randwrite bs=4k drives=3 scst_threads=3 srptthread=1
iops=95389.01
type=randwrite bs=512 drives=1 scst_threads=1 srptthread=0
iops=50299.36
type=randwrite bs=4k drives=1 scst_threads=1 srptthread=0
iops=48070.11
type=randwrite bs=512 drives=2 scst_threads=1 srptthread=0
iops=54017.21
type=randwrite bs=4k drives=2 scst_threads=1 srptthread=0
iops=50407.20
type=randwrite bs=512 drives=3 scst_threads=1 srptthread=0
iops=55822.11
type=randwrite bs=4k drives=3 scst_threads=1 srptthread=0
iops=50447.82
type=randwrite bs=512 drives=1 scst_threads=2 srptthread=0
iops=60672.48
type=randwrite bs=4k drives=1 scst_threads=2 srptthread=0
iops=48811.93
type=randwrite bs=512 drives=2 scst_threads=2 srptthread=0
iops=81919.87
type=randwrite bs=4k drives=2 scst_threads=2 srptthread=0
iops=72912.99
type=randwrite bs=512 drives=3 scst_threads=2 srptthread=0
iops=91036.45
type=randwrite bs=4k drives=3 scst_threads=2 srptthread=0
iops=88994.63
type=randwrite bs=512 drives=1 scst_threads=3 srptthread=0
iops=58929.21
type=randwrite bs=4k drives=1 scst_threads=3 srptthread=0
iops=48698.90
type=randwrite bs=512 drives=2 scst_threads=3 srptthread=0
iops=83967.58
type=randwrite bs=4k drives=2 scst_threads=3 srptthread=0
iops=73932.36
type=randwrite bs=512 drives=3 scst_threads=3 srptthread=0
iops=96686.46
type=randwrite bs=4k drives=3 scst_threads=3 srptthread=0
iops=88689.27
And here are the results with NULLIO, sorted by block size. Having the
SRPT thread=0 actually shows some benefit here:
-------------------------------------------
type=randwrite bs=4k drives=1 scst_threads=1 srptthread=0 iops=140700.40
type=randwrite bs=4k drives=1 scst_threads=1 srptthread=1 iops=89167.67
type=randwrite bs=4k drives=1 scst_threads=2 srptthread=0 iops=125166.68
type=randwrite bs=4k drives=1 scst_threads=2 srptthread=1 iops=136699.05
type=randwrite bs=4k drives=1 scst_threads=3 srptthread=0 iops=127363.18
type=randwrite bs=4k drives=1 scst_threads=3 srptthread=1 iops=91205.03
type=randwrite bs=4k drives=2 scst_threads=1 srptthread=0 iops=94412.46
type=randwrite bs=4k drives=2 scst_threads=1 srptthread=1 iops=84354.34
type=randwrite bs=4k drives=2 scst_threads=2 srptthread=0 iops=155053.30
type=randwrite bs=4k drives=2 scst_threads=2 srptthread=1 iops=102480.27
type=randwrite bs=4k drives=2 scst_threads=3 srptthread=0 iops=141045.50
type=randwrite bs=4k drives=2 scst_threads=3 srptthread=1 iops=99681.15
type=randwrite bs=4k drives=3 scst_threads=1 srptthread=0 iops=173182.91
type=randwrite bs=4k drives=3 scst_threads=1 srptthread=1 iops=117629.27
type=randwrite bs=4k drives=3 scst_threads=2 srptthread=0 iops=99960.51
type=randwrite bs=4k drives=3 scst_threads=2 srptthread=1 iops=103412.00
type=randwrite bs=4k drives=3 scst_threads=3 srptthread=0 iops=120926.77
type=randwrite bs=4k drives=3 scst_threads=3 srptthread=1 iops=100368.32
type=randwrite bs=512 drives=1 scst_threads=1 srptthread=0 iops=102232.77
type=randwrite bs=512 drives=1 scst_threads=1 srptthread=1 iops=139095.94
type=randwrite bs=512 drives=1 scst_threads=2 srptthread=0 iops=130327.29
type=randwrite bs=512 drives=1 scst_threads=2 srptthread=1 iops=159158.20
type=randwrite bs=512 drives=1 scst_threads=3 srptthread=0 iops=136153.84
type=randwrite bs=512 drives=1 scst_threads=3 srptthread=1 iops=92417.19
type=randwrite bs=512 drives=2 scst_threads=1 srptthread=0 iops=126892.60
type=randwrite bs=512 drives=2 scst_threads=1 srptthread=1 iops=99436.74
type=randwrite bs=512 drives=2 scst_threads=2 srptthread=0 iops=101566.13
type=randwrite bs=512 drives=2 scst_threads=2 srptthread=1 iops=142292.97
type=randwrite bs=512 drives=2 scst_threads=3 srptthread=0 iops=166114.78
type=randwrite bs=512 drives=2 scst_threads=3 srptthread=1 iops=155634.89
type=randwrite bs=512 drives=3 scst_threads=1 srptthread=0 iops=131368.01
type=randwrite bs=512 drives=3 scst_threads=1 srptthread=1 iops=186550.24
type=randwrite bs=512 drives=3 scst_threads=2 srptthread=0 iops=139813.79
type=randwrite bs=512 drives=3 scst_threads=2 srptthread=1 iops=162499.08
type=randwrite bs=512 drives=3 scst_threads=3 srptthread=0 iops=154777.28
type=randwrite bs=512 drives=3 scst_threads=3 srptthread=1 iops=187425.87
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