<html> <head> <base href="https://bugs.freedesktop.org/" /> </head> <body> <div> <a class="bz_bug_link bz_status_ASSIGNED " title="ASSIGNED - [SKL bisected] texsubimage pbo intermittent failures" href="https://bugs.freedesktop.org/show_bug.cgi?id=91926#c34">Comment # 34</a> on <a class="bz_bug_link bz_status_ASSIGNED " title="ASSIGNED - [SKL bisected] texsubimage pbo intermittent failures" href="https://bugs.freedesktop.org/show_bug.cgi?id=91926">bug 91926</a> from <a class="email" href="mailto:topi.pohjolainen@intel.com" title="Topi Pohjolainen <topi.pohjolainen@intel.com>"> Topi Pohjolainen</a> <pre>(In reply to Topi Pohjolainen from <a href="show_bug.cgi?id=91926#c13">comment #13</a>) > I was able to narrow down the combination of _mesa_update_state() and > brw_emit_mi_flush(). I got it simplified to a call _mesa_update_texture() > followed by part of the logic in brw_context.c:intel_update_state() - namely > calling brw_render_cache_set_check_flush() at least once. That call in turn > is simple check for existence of the underlying buffer object of the texture > and then a call to brw_emit_mi_flush(). > > So, after more simplification, I found out that if I'm calling > brw_emit_mi_flush() _twice_ after the call for _mesa_meta_pbo_TexSubImage() > in intelTexSubImage() I'm not able to reproduce the error. Recall that > calling brw_emit_mi_flush() isn't enough. > > This is turn means that I'm mostly likely in square one - I'm simple > changing the dynamics enough to hide the real bug. I have a little more to add here. I started reading bspec again regarding flushing and related pipe control options. I added another brw_emit_pipe_control_flush() into brw_emit_mi_flush() in order to experiment with individual bits of the pipe control command. (All that brw_emit_mi_flush() does is to emit pipe-control commands). Neither on IVB or on SKL I cannot see any failures if I just submit another pipe-control command with only a single bit set, namely PIPE_CONTROL_TEXTURE_CACHE_INVALIDATE. Any other bit didn't seem to make any difference.</pre> </div> <hr> You are receiving this mail because: <ul> <li>You are the QA Contact for the bug.</li> </ul> </body> </html>