<html> <head> <base href="https://bugs.freedesktop.org/"> </head> <body> <div> <a class="bz_bug_link bz_status_NEW " title="NEW - Radeon: heavy r300 performance drop regression between 11.x and 19.x" href="https://bugs.freedesktop.org/show_bug.cgi?id=110781#c58">Comment # 58</a> on <a class="bz_bug_link bz_status_NEW " title="NEW - Radeon: heavy r300 performance drop regression between 11.x and 19.x" href="https://bugs.freedesktop.org/show_bug.cgi?id=110781">bug 110781</a> from <a class="email" href="mailto:u9vata@gmail.com" title="Richard Thier <u9vata@gmail.com>"> Richard Thier</a> <pre>The output from gdb glxgears on the segfault: #0 0xb75a8892 in radeon_winsys_bo_create (rws=0x45e100, size=4096, alignment=4096, domain=RADEON_DOMAIN_GTT, flags=(unknown: 0)) at radeon_drm_bo.c:993 #1 0xb75a972b in radeon_cs_create_fence (rcs=rcs@entry=0xb06a4010) at radeon_drm_cs.c:753 #2 0xb75aa327 in radeon_drm_cs_flush (rcs=0xb06a4010, flags=2, pfence=0xbffff7d8) at radeon_drm_cs.c:593 #3 0xb757845a in r300_flush_and_cleanup (r300=r300@entry=0x446090, flags=flags@entry=2, fence=fence@entry=0xbffff7d8) at r300_flush.c:56 #4 0xb757860f in r300_flush (pipe=0x446090, flags=2, fence=0xbffff7d8) at r300_flush.c:82 #5 0xb731508f in st_context_flush (stctxi=0x55ed20, flags=3, fence=0xbffff7d8) at state_tracker/st_manager.c:635 #6 0xb74511f8 in dri_flush (cPriv=0x445fd0, dPriv=0x5760d0, flags=3, reason=__DRI2_THROTTLE_SWAPBUFFER) at dri_drawable.c:568 #7 0xb7f9dbe8 in dri2Flush (psc=psc@entry=0x4165d0, ctx=<optimized out>, draw=draw@entry=0x5590e0, flags=3, throttle_reason=__DRI2_THROTTLE_SWAPBUFFER) at dri2_glx.c:553 #8 0xb7f9e09d in dri2SwapBuffers (pdraw=0x5590e0, target_msc=0, divisor=0, remainder=0, flush=1) at dri2_glx.c:845 #9 0xb7f73049 in glXSwapBuffers (dpy=0x407160, drawable=18874370) at glxcmds.c:843 #10 0x00401742 in ?? () #11 0xb7b5c669 in __libc_start_main () from /usr/lib/libc.so.6 #12 0x00401cd5 in ?? () I have changed this relevant part with the added flag: /* Create a fence, which is a dummy BO. */ fence = cs->ws->base.buffer_create(&cs->ws->base, 1, 1, RADEON_DOMAIN_GTT, RADEON_FLAG_NO_SUBALLOC | RADEON_FLAG_NO_INTERPROCESS_SHARING); Currently I am testing this, in latest but the build is still going. Will upload patch for it only if it works. I think it does not harm, but this is happening when the bo is a "fence". I have no idea what a fence is in this terminology, but surely it sounds some synchronization primitive so I am unsure that I can add the flag safely, but knowing earlier it was not in the code likely I can just add it. Will see how this shrinks the GEM_CREATE call numbers.</pre> </div> <hr> You are receiving this mail because: <ul> <li>You are the assignee for the bug.</li> </ul> </body> </html>