On Thu, 13 Dec 2018 17:46:30 +0100
Paolo Valente <paolo.vale...@linaro.org> wrote:
> > Il giorno 13 dic 2018, alle ore 17:41, stan
> > <stanl-fedorau...@vfemail.net> ha scritto:
> >
> You don't have bfq for a comparison, but you can still get an idea of
> how good your system is, by comparing these start-up times with how
> long the same application takes to start when there is no I/O. Just
> do
>
> sudo ./comm_startup_lat.sh <scheduler-you-want-to-test> 0 0 seq 3
> "replay-startup-io gnometerm"
>
cfq with the above command (without I/O): *BIG* difference.
Latency statistics:
min max avg std_dev conf99%
1.34 1.704 1.53367 0.183118 3.66336
Aggregated throughput:
min max avg std_dev conf99%
0 8.03 5.23143 2.60745 15.4099
Read throughput:
min max avg std_dev conf99%
0 8.03 5.22571 2.60522 15.3967
Write throughput:
min max avg std_dev conf99%
0 0.02 0.00571429 0.00786796 0.0464991
> and get ready to be surprised (next surprise when/if you'll try with
> bfq ...)
I had a response saying that bfq isn't available for single queue
devices, but there might be a workaround. So it might or might not
happen, depending on whether I can get it working.
> > cfq
> >
> > Latency statistics:
> > min max avg std_dev conf99%
> > 22.142 27.157 24.1967 2.6273 52.5604
> > Aggregated throughput:
> > min max avg std_dev conf99%
> > 67.29 139.74 105.491 19.245 39.7628
> > Read throughput:
> > min max avg std_dev conf99%
> > 51.73 135.67 102.402 21.3985 44.2123
> > Write throughput:
> > min max avg std_dev conf99%
> > 0.01 46.29 3.08857 8.37179 17.2972
> >
> > noop
> >
> > Latency statistics:
> > min max avg std_dev conf99%
> > 40.861 42.021 41.3637 0.595266 11.9086
> > Aggregated throughput:
> > min max avg std_dev conf99%
> > 45.66 72.89 55.9847 5.99054 9.87365
> > Read throughput:
> > min max avg std_dev conf99%
> > 41.69 70.85 51.9495 6.02467 9.9299
> > Write throughput:
> > min max avg std_dev conf99%
> > 0 7.9 4.03527 1.62392 2.67656
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