strange getrusage timer problem with rt-kernel

strange getrusage timer problem with rt-kernel

[crquan]

I'm testing 2.6.26.6-rt11 (is that the latest?) kernel, using tiotest from tiobench
(http://sourceforge.net/projects/tiobench/), a classic multi-thread IO stress tool,

it reported a strange problem, with:

root:~/tiobench# time ./tiotest -R -d /dev/mapper/dg5-lv2 -t 1 -f 1000 -r 102400
tiotest: tiotest.c:609: add_timer: Assertion end_time->tv_sec >= start_time->tv_sec' failed.?

this problem never happened in mainstream kernels.

Regards,

--
Cheng Renquan, Shenzhen, China

Re: strange getrusage timer problem with rt-kernel

[Cheng Renquan]

> From: crquan@gmail.com
> To: linux-rt-users@vger.kernel.org
> Subject: strange getrusage timer problem with rt-kernel
>
> I'm testing 2.6.26.6-rt11 (is that the latest?) kernel, using tiotest from tiobench
> (http://sourceforge.net/projects/tiobench/), a classic multi-thread IO stress tool,
>
> it reported a strange problem, with:
>
> root:~/tiobench# time ./tiotest -R -d /dev/mapper/dg5-lv2 -t 1 -f 1000 -r 102400
> tiotest: tiotest.c:609: add_timer: Assertion `end_time->tv_sec >= start_time->tv_sec' failed.
> Aborted
>
> real8m35.086s
> user0m2.080s
> sys0m7.000s
>
> Not always, just few times, you can view the tiotest.c code from:
> http://tiobench.cvs.sourceforge.net/viewvc/tiobench/tiobench/tiotest.c?revision=1.20&view=markup
>
> when add_timer called, it's passed with two timers, one before the io test, and the other is after
> the io tests, why the Assertion `end_time->tv_sec >= start_time->tv_sec' failed.?
>
> this problem never happened in mainstream kernels.
>
> Regards,
>
> --
> Cheng Renquan, Shenzhen, China
>
> EOF