From: Hoppetauet <hoppetauet@gmail.com>
To: fio@vger.kernel.org
Subject: Completion and submission latency
Date: Tue, 10 Apr 2012 14:08:10 +0200 [thread overview]
Message-ID: <4F8422AA.9020005@gmail.com> (raw)
Hi
I was wondering about the completion latencies. I have been doing some
virtual machine testing, and would like some help about what the values
mean.
3;2.0.6;seqwrite;0;0;0;0;0;0;0;0;0.000000;0.000000;0;0;0.000000;0.000000;1.00%=0;5.00%=0;10.00%=0;20.00%=0;30.00%=0;40.00%=0;50.00%=0;60.00%=0;70.00%=0;80.00%=0;90.00%=0;95.00%=0;99.00%=0;99.50%=0;99.90%=0;99.95%=0;99.99%=0;0%=0;0%=0;0%=0;0;0;0.000000;0.000000;0;0;0.000000%;0.000000;0.000000;4194304;17426;4254;246466;0;0;0.000000;0.000000;3;5439652;228.431381;20540.522574;1.00%=4;5.00%=4;10.00%=5;20.00%=5;30.00%=5;40.00%=6;50.00%=6;60.00%=6;70.00%=6;80.00%=7;90.00%=9;95.00%=15;99.00%=25;99.50%=59;99.90%=548;99.95%=3664;99.99%=325632;0%=0;0%=0;0%=0;3;5439652;228.905854;20540.525416;0;162531;100.000000%;30172.429268;37422.864723;2.337414%;3.129483%;6751;1;20;100.0%;0.0%;0.0%;0.0%;0.0%;0.0%;0.0%;0.00%;0.38%;91.44%;6.62%;0.94%;0.27%;0.05%;0.20%;0.02%;0.01%;0.03%;0.01%;0.01%;0.01%;0.01%;0.01%;0.02%;0.01%;0.01%;0.01%;0.01%;0.01%;vda;77;10364;0;12806;4900;19896664;19973372;99.30%
This is one of my test runs. The completion latency stats are as follows:
min: 3
max: 5439652
avg: 228.431381
std: 20540.522574
Does this mean that the maximum amount of time it takes to write 4KB is
5.4 seconds? Are the values in microseconds or milliseconds (it's
microseconds right)?
Thanks
next reply other threads:[~2012-04-10 12:08 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-04-10 12:08 Hoppetauet [this message]
2012-04-10 12:39 ` Completion and submission latency Jens Axboe
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