[Bug 82749] [all Bisected]igt/gem_wait/render_timeout fails

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=82749

Guo Jinxian <jinxianx.guo at intel.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|[all                        |[all
                   |Regression]igt/gem_wait/ren |Bisected]igt/gem_wait/rende
                   |der_timeout fails           |r_timeout fails

--- Comment #17 from Guo Jinxian <jinxianx.guo at intel.com> ---
(In reply to Daniel Vetter from comment #15)
> Hm, no bisect result.
> 
> On a hunch this regression is probably due to
> 
> commit 5ed0bdf21a85d78e04f89f15ccf227562177cbd9
> Author: Thomas Gleixner <tglx at linutronix.de>
> Date:   Wed Jul 16 21:05:06 2014 +0000
> 
>     drm: i915: Use nsec based interfaces
>     
>     Use ktime_get_raw_ns() and get rid of the back and forth timespec
>     conversions.
>     
>     Signed-off-by: Thomas Gleixner <tglx at linutronix.de>
>     Acked-by: Daniel Vetter <daniel.vetter at ffwll.ch>
>     Signed-off-by: John Stultz <john.stultz at linaro.org>
> 
> Can you please test this commit + its parent to check whether that's right?
> Test results here on my machine are somehow strange so I'd like confirmation.
Yes, 5ed0bdf21a85d78e04f89f15ccf227562177cbd9 is the first bad commit. it's
parents commit(f519b1a2e08c913375324a927992bb328387f169) is good commit. 

[root at x-hsw24 tests]# ./gem_wait --run-subtest render_timeout
IGT-Version: 1.8-gdbac905 (x86_64) (Linux: 3.16.0-rc5_kcloud_f519b1_20141201+
x86_64)
8192 iters is enough work
Finished with 815483789 time remaining
Subtest render_timeout: SUCCESS (10.395s)


[root at x-hsw24 tests]# ./gem_wait --run-subtest render_timeout
IGT-Version: 1.8-gdbac905 (x86_64) (Linux: 3.16.0-rc5_kcloud_5ed0bd_20141201+
x86_64)
8192 iters is enough work
Finished with 815166097 time remaining
Test assertion failure function render_timeout, file gem_wait.c:200:
Failed assertion: timeout == 0
Last errno: 62, Timer expired
error: 1170404 != 0
Subtest render_timeout: FAIL (10.392s)

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