Re: Help understanding slow down
From: Andrew Morton
Date: Sun May 23 2004 - 21:46:55 EST
Phy Prabab <phyprabab@xxxxxxxxx> wrote:
>
> Okay, so ran the test with vmstat running. I ran it
> capturing every 1 sec. Here is an excert:
That was horridly wordwrapped.
procs memory swap io system cpu
r b swpd free buff cache si so bi bo in cs us sy id wa
1 0 0 8153848 17000 82348 0 0 0 0 4568 4028 6 16 78 0
0 1 0 8154168 17008 82340 0 0 0 160 4596 4079 7 17 76 1
1 0 0 8153848 17008 82340 0 0 0 0 4511 3998 7 16 76 0
1 0 0 8153912 17008 82340 0 0 0 0 4460 3952 7 14 79 0
1 0 0 8153784 17016 82332 0 0 0 0 4437 3962 7 16 77 0
1 0 0 8153528 17016 82332 0 0 0 0 4444 3927 7 14 78 0
1 1 0 8153784 17024 82392 0 0 0 144 4399 3895 7 15 77 1
0 0 0 8153592 17024 82392 0 0 0 0 4367 3821 7 15 78 0
1 0 0 8153848 17024 82392 0 0 0 0 4393 3926 6 16 78 0
1 0 0 8153528 17024 82460 0 0 0 0 4438 3960 8 14 78 0
1 0 0 8154040 17024 82460 0 0 0 0 4415 3912 6 15 78 0
1 1 0 8153720 17032 82452 0 0 0 140 4457 3953 7 15 77 1
1 0 0 8153784 17032 82452 0 0 0 0 4437 3889 7 14 79 0
0 0 0 8153784 17040 82444 0 0 0 0 4398 3903 8 15 77 0
1 0 0 8153464 17040 82444 0 0 0 0 4398 3902 7 14 79 0
0 0 0 8153528 17040 82444 0 0 0 0 4447 3922 6 17 77 0
0 1 0 8153720 17052 82432 0 0 0 144 4490 3960 6 16 77 1
0 0 0 8153656 17056 82428 0 0 0 0 4449 3954 7 15 78 0
This is a single-CPU machine, yes?
Your application is spending most of the time in an explicit sleep of some
form. Suggest you run strace against it and see what it's up to.
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