<html> <head> <base href="https://bugs.freedesktop.org/" /> </head> <body> <div> <a class="bz_bug_link bz_status_NEEDINFO " title="NEEDINFO - constant fps drops with Intel and Radeon on Source games" href="https://bugs.freedesktop.org/show_bug.cgi?id=87886#c5">Comment # 5</a> on <a class="bz_bug_link bz_status_NEEDINFO " title="NEEDINFO - constant fps drops with Intel and Radeon on Source games" href="https://bugs.freedesktop.org/show_bug.cgi?id=87886">bug 87886</a> from <a class="email" href="mailto:stephane.travostino@gmail.com" title="Stéphane Travostino <stephane.travostino@gmail.com>"> Stéphane Travostino</a> <pre>(In reply to Eero Tamminen from <a href="show_bug.cgi?id=87886#c1">comment #1</a>) > Has your performance regressed? This fall there have been some compiler > frontend improvements that allow e.g. more inlining to be done for some > shaders, and as result compilation can take (in worst case even several > times) longer than earlier. See <a class="bz_bug_link bz_status_NEW " title="NEW - [BYT/HSW/BDW Bisected]SynMark2_v6_0_0_OglDrvShComp performance reduced ~60%" href="show_bug.cgi?id=86140">bug 86140</a>. I've always seen lag with the Radeon card, although it seems to be slowly getting better since my first tests 12 months ago. I don't have numbers to support that claim though. > > Recompile messages come from the backend which is separate for AMD and > Intel, i.e. you may need to file separate bugs for each (Intel one would be > for "Drivers/DRI/i965" component). I've opened a generic bug report since this affects two different card vendors, and even if Intel has some specific bugs or performance issues, I suspect the problem is in the driver-independent code. > > > > This happens with Counter Strike: Global Offensive and Left 4 Dead 2 (only games available for testing), also when standing still in an empty black room. > > Please give detailed instructions, how one can reach an "empty black room" > where Mesa will do constant shader recompiles. Preferably in single player > / tutorial level which doesn't require hours of playing. Left 4 Dead 2 instructions: load a single player game, Dead Center map 1, load the game: as soon as the game starts (helicopter scene) you get a noticeable slowdown, probably due to map loading. >From that point on, every few seconds you should get a noticeable lag every few seconds. You can get a bigger slowdown when meleeing zombies or the explosion about 30 seconds into the game. Note: this affects every map, and is constant in every point of the map. I written about the empty room just to point out that this happen even when there is nothing being rendered on the screen (apart from HUD). > > (I haven't seen anything like that on HSW in those games.) > > Alternatively, you could provide Apitrace trace. Will do.</pre> </div> <hr> You are receiving this mail because: <ul> <li>You are the assignee for the bug.</li> </ul> </body> </html>