[Bug 91926] [SKL bisected] texsubimage pbo intermittent failures

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=91926

--- Comment #61 from Topi Pohjolainen <topi.pohjolainen at intel.com> ---
(In reply to Ben Widawsky from comment #60)
> (In reply to Topi Pohjolainen from comment #58)
> > (In reply to Topi Pohjolainen from comment #57)
> > > Decreasing the texture and buffer size into one fourth of the original, into
> > > 64x32, seems to give me 100% probability of reproducing on IVB with the
> > > simplified test case. I'll try with the original and SKL.
> > 
> > More on IVB first. Using 32 x 16 x 4 = 2048 looks to be too small to
> > reproduce. On the other hand 32 x 32 x 4 = 4096 looks to give 100%
> > probability. The latter has the buffer end at the page boundary suggesting
> > that buffer overrun due to alignment plays some role afterall (perhaps just
> > something more complex than discussed before).
> 
> Just for grins, how about 32 x 16 x 8?

If you give me a GL format that requires eight bytes I can see if the test can
be modified. (I don't know the GL api well enough to know if such thing
exists).

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