<div dir="ltr"><div>I have tested with nouveau (on a GeForce GT210 (NVA8)) and everything is fine with it. No glitches while retracing.<br></div>Here is an example trace if you want to compare :<br><a href="https://drive.google.com/file/d/0B7D2Y0QXFND2aHp0M0gzVE81dEk/view?usp=sharing">https://drive.google.com/file/d/0B7D2Y0QXFND2aHp0M0gzVE81dEk/view?usp=sharing</a> (149 MB)<br>md5sum 0988b7a222a923520180783e28be267a<br></div><div class="gmail_extra"><br><div class="gmail_quote">2014-11-09 23:55 GMT+01:00 Benjamin Bellec <span dir="ltr"><<a href="mailto:b.bellec@gmail.com" target="_blank">b.bellec@gmail.com</a>></span>:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><div><div><div><div><div><div>I tried to follow the procedure in the link you pointed, but I couldn't make it works. So I just disabled the Steam Overlay as said, and continued to catch the trace with my modified "Sam3" file, which should works after all.<br><br></div>Just disabling the overlay doesn't solve the glitches.<br>So I tested your 3 patches, unfortunately none of them has improved the situation : as usual, sometimes there is no glitches at all but most of times glitches appears while retracing.<br><br></div>If you need them, here are some of the traces :<br></div>- trace with zlib patch, the glitches are a bit different than usual : <a href="https://drive.google.com/file/d/0B7D2Y0QXFND2ZXp5SVR0QU1GV2M/view?usp=sharing" target="_blank">https://drive.google.com/file/d/0B7D2Y0QXFND2ZXp5SVR0QU1GV2M/view?usp=sharing</a> (174 MB) md5sum 1b109d36e7760968ad8ce04bc4d22fe9<br>- trace with glfinish patch : <a href="https://drive.google.com/file/d/0B7D2Y0QXFND2M3N0VDY4QUlHNE0/view?usp=sharing" target="_blank">https://drive.google.com/file/d/0B7D2Y0QXFND2M3N0VDY4QUlHNE0/view?usp=sharing</a> (158 MB) md5sum 8d4b9a7de7f1ce4fe02385259a952b25<br></div>- again a trace with glfinish patch, glitches are different from the first one : <a href="https://drive.google.com/file/d/0B7D2Y0QXFND2ZUNCTVNqM19BbUk/view?usp=sharing" target="_blank">https://drive.google.com/file/d/0B7D2Y0QXFND2ZUNCTVNqM19BbUk/view?usp=sharing</a> (155 MB) md5sum 7bda946ce1cd21f8138e0724b7502219<br><br></div>Tomorrow, I will test with a GeForce GT210 (nouveau).<br></div></div><div class="HOEnZb"><div class="h5"><div class="gmail_extra"><br><div class="gmail_quote">2014-11-07 13:53 GMT+01:00 Benjamin Bellec <span dir="ltr"><<a href="mailto:b.bellec@gmail.com" target="_blank">b.bellec@gmail.com</a>></span>:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><div>OK, I will redo my trace with this new procedure. It seems cleaner and safer than mine.<br></div>But I will not be able to do this weekend.<br></div><div><div><div class="gmail_extra"><br><div class="gmail_quote">2014-11-07 9:57 GMT+01:00 José Fonseca <span dir="ltr"><<a href="mailto:jose.r.fonseca@gmail.com" target="_blank">jose.r.fonseca@gmail.com</a>></span>:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><div>Hi Benjamin,</div><span><div><br></div><div>> ERROR: ld.so: object '/home/benjamin/.local/share/Steam/ubuntu12_32/gameoverlayrenderer.so' from LD_PRELOAD cannot be preloaded: ignored.</div><div><br></div></span><div>It might be a good idea to disable Steam's game overlay, just to be sure it's not interfering with apitrace, as described in <a href="https://github.com/apitrace/apitrace/wiki/Steam#linux" target="_blank">https://github.com/apitrace/apitrace/wiki/Steam#linux</a> , the " Otherwise, I think what you're doing should be fine.</div><span><div><br></div><div>> apitrace: warning: _gl_param_size: unknown GLenum 0x87FC</div><div><br></div></span><div>For these warnings I'll push a fix to apitrace shortly, but they are harmless -- it won't affect the trace at all.</div><div><br></div><div>Jose</div><div><div><div><div class="gmail_extra"><br></div><div class="gmail_extra"><br><div class="gmail_quote">On Thu, Nov 6, 2014 at 10:36 PM, Benjamin Bellec <span dir="ltr"><<a href="mailto:b.bellec@gmail.com" target="_blank">b.bellec@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-color:rgb(204,204,204);border-left-style:solid;padding-left:1ex"><div dir="ltr"><div><div><div><div><div><div><div><div><div><div><div><div><div>Hi José,<br><br></div>I have done quite intense testing of this evening, but I finally saw something quite odd. So before sharing anything I need to be sure that I'm not capturing the trace wrongly.<br><br></div>First of all, Serious Sam 3 is a Steam game. It's a 32-bit game. I'm on a 64-bit machine.<br><br>Here is how I build apitrace :<br></div>$ git clone <a href="https://github.com/apitrace/apitrace.git" target="_blank">https://github.com/apitrace/apitrace.git</a><br></div>$ cd apitrace<br>$ cmake -H. -Bbuild -DCMAKE_BUILD_TYPE=RelWithDebInfo -DENABLE_GUI=TRUE<br>$ make -C build<br>$ cmake \<br> -DCMAKE_C_FLAGS=-m32 \<br> -DCMAKE_CXX_FLAGS=-m32 \<br> -DCMAKE_EXE_LINKER_FLAGS=-m32 \<br> -DCMAKE_SYSTEM_LIBRARY_PATH=/usr/lib \<br> -DENABLE_GUI=FALSE \<br> -H. -Bbuild32<br>$ make -C build32 glxtrace<br><br></div>So I should now have a working apitrace in /home/benjamin/apitrace<br><br></div>I launch steam :<br>$ steam<br>Running Steam on fedora 19 64-bit<br>STEAM_RUNTIME is enabled automatically<br>Installing breakpad exception handler for appid(steam)/version(1413917607)<br>Installing breakpad exception handler for appid(steam)/version(1413917607)<br><br>(steam:2986): Gtk-WARNING **: Impossible de trouver le moteur de thème dans module_path : « adwaita »<br><br>(steam:2986): Gtk-WARNING **: Impossible de trouver le moteur de thème dans module_path : « adwaita »<br>/usr/share/themes/Adwaita/gtk-2.0/gtkrc:1137: error: unexpected identifier `direction', expected character `}'<br>Gtk-Message: Failed to load module "pk-gtk-module"<br><br>(steamwebhelper:2990): Gtk-WARNING **: Impossible de trouver le moteur de thème dans module_path : « adwaita »<br><br>(steamwebhelper:2990): Gtk-WARNING **: Impossible de trouver le moteur de thème dans module_path : « adwaita »<br>/usr/share/themes/Adwaita/gtk-2.0/gtkrc:1137: error: unexpected identifier `direction', expected character `}'<br>Gtk-Message: Failed to load module "pk-gtk-module"<br>Installing breakpad exception handler for appid(steamwebhelper)/version(20141020140456)<br>Installing breakpad exception handler for appid(steamwebhelper)/version(1413813896)<br>[1106/231809:ERROR:nss_util.cc(1018)] Failed to load NSS libraries.<br>Installing breakpad exception handler for appid(steamwebhelper)/version(20141020140456)<br>Installing breakpad exception handler for appid(steamwebhelper)/version(1413813896)<br>Fontconfig error: "/etc/fonts/conf.d/10-scale-bitmap-fonts.conf", line 70: non-double matrix element<br>Fontconfig error: "/etc/fonts/conf.d/10-scale-bitmap-fonts.conf", line 70: non-double matrix element<br>Fontconfig warning: "/etc/fonts/conf.d/10-scale-bitmap-fonts.conf", line 78: saw unknown, expected number<br>Fontconfig warning: "/etc/fonts/conf.d/65-0-lohit-bengali.conf", line 32: unknown element "langset"<br>Installing breakpad exception handler for appid(steam)/version(1413917607)<br>Installing breakpad exception handler for appid(steam)/version(1413917607)<br>Installing breakpad exception handler for appid(steam)/version(1413917607)<br>Installing breakpad exception handler for appid(steam)/version(1413917607)<br>Installing breakpad exception handler for appid(steam)/version(1413917607)<br>Installing breakpad exception handler for appid(steam)/version(1413917607)<br>Generating new string page texture 2: 48x256, total string texture memory is 49,15 KB<br>Generating new string page texture 3: 256x256, total string texture memory is 311,30 KB<br>Installing breakpad exception handler for appid(steam)/version(1413917607)<br>Installing breakpad exception handler for appid(steam)/version(1413917607)<br>Installing breakpad exception handler for appid(steam)/version(1413917607)<br>Adding licenses for the following package(s): 0, 11, 34, 79, 516, 984, 2481, 12328, 14840, 16549, 17838, 20883, 21089, 25544, 27644, 29136, 31974, 31975, 49307, 53394, 53820<br>roaming config store loaded successfully - 1484 bytes.<br>migrating temporary roaming config store<br>Installing breakpad exception handler for appid(steam)/version(1413917607)<br>ExecCommandLine: ""/home/benjamin/.local/share/Steam/ubuntu12_32/steam" "<br>System startup time: 3,47 seconds<br>[1106/231812:ERROR:renderer_main.cc(227)] Running without renderer sandbox<br>Generating new string page texture 70: 1024x256, total string texture memory is 1,36 MB<br>Generating new string page texture 71: 256x256, total string texture memory is 262,14 KB<br>Generating new string page texture 72: 128x256, total string texture memory is 1,49 MB<br>Running Steam on fedora 19 64-bit<br>STEAM_RUNTIME has been set by the user to: /home/benjamin/.local/share/Steam/ubuntu12_32/steam-runtime<br>Generating new string page texture 73: 32x256, total string texture memory is 1,52 MB<br>ExecCommandLine: "/home/benjamin/.steam/root/ubuntu12_32/steam steam://open/driverhelperready"<br>ExecSteamURL: "steam://open/driverhelperready"<br>Generating new string page texture 78: 64x256, total string texture memory is 1,59 MB<br>Generating new string page texture 79: 256x256, total string texture memory is 1,85 MB<br>Generating new string page texture 80: 128x256, total string texture memory is 1,98 MB<br>Generating new string page texture 81: 384x256, total string texture memory is 2,38 MB<br>Installing breakpad exception handler for appid(steam)/version(1413917607)<br>Generating new string page texture 91: 512x256, total string texture memory is 2,90 MB<br><br><br></div>And in order to catch a trace of the game, I have modified the SS3 executable. The executable is located in "/home/benjamin/.local/share/Steam/SteamApps/common/Serious Sam 3/Bin" and is named "Sam3"<br><br>$ file "/home/benjamin/.local/share/Steam/SteamApps/common/Serious Sam 3/Bin/Sam3" gives :<br></div>ELF 32-bit LSB executable, Intel 80386, version 1 (SYSV), dynamically linked (uses shared libs), for GNU/Linux 2.6.15, BuildID[sha1]=0xaedfd266c84ecec32e8ff6e69f3f1eb8a5f78d46, stripped<br><br></div>So I moved the genuine exec :<br></div>$ mv Sam3 Sam3.old<br><br></div>And created a new "Sam3" shell script which is just :<br>#!/bin/sh<br>TRACE_FILE=/home/benjamin/testmesa/ss3_tmp.trace LD_PRELOAD=/home/benjamin/apitrace/build32/wrappers/glxtrace.so /home/benjamin/apitrace/build/apitrace trace --api gl ./Sam3.old<br><br></div>So now I just launch SS3 within Steam and here is the log (that I didn't saw before) :<br>Game update: AppID 41070 "Serious Sam 3: BFE", ProcID 3108, IP <a href="http://0.0.0.0:0" target="_blank">0.0.0.0:0</a><br>ERROR: ld.so: object '/home/benjamin/.local/share/Steam/ubuntu12_32/gameoverlayrenderer.so' from LD_PRELOAD cannot be preloaded: ignored.<br>ERROR: ld.so: object '/home/benjamin/.local/share/Steam/ubuntu12_32/gameoverlayrenderer.so' from LD_PRELOAD cannot be preloaded: ignored.<br>ERROR: ld.so: object '/home/benjamin/apitrace/build32/wrappers/glxtrace.so' from LD_PRELOAD cannot be preloaded: ignored.<br>ERROR: ld.so: object '/home/benjamin/apitrace/build/wrappers/glxtrace.so' from LD_PRELOAD cannot be preloaded: ignored.<br>apitrace: loaded into /home/benjamin/.local/share/Steam/SteamApps/common/Serious Sam 3/Bin/Sam3.old<br><br>(steam:2986): LIBDBUSMENU-GLIB-WARNING **: Trying to remove a child that doesn't believe we're it's parent.<br></div> [snip] same message several times [/snip]<br><div>(steam:2986): LIBDBUSMENU-GLIB-WARNING **: Trying to remove a child that doesn't believe we're it's parent.<br>ERROR: ld.so: object '/home/benjamin/apitrace/build32/wrappers/glxtrace.so' from LD_PRELOAD cannot be preloaded: ignored.<br>apitrace: loaded into /usr/bin/bash<br>ERROR: ld.so: object '/home/benjamin/apitrace/build32/wrappers/glxtrace.so' from LD_PRELOAD cannot be preloaded: ignored.<br>apitrace: loaded into /usr/bin/getopt<br>ERROR: ld.so: object '/home/benjamin/apitrace/build32/wrappers/glxtrace.so' from LD_PRELOAD cannot be preloaded: ignored.<br>apitrace: loaded into /usr/bin/basename<br>ERROR: ld.so: object '/home/benjamin/apitrace/build32/wrappers/glxtrace.so' from LD_PRELOAD cannot be preloaded: ignored.<br>apitrace: loaded into /usr/bin/basename<br>ERROR: ld.so: object '/home/benjamin/apitrace/build32/wrappers/glxtrace.so' from LD_PRELOAD cannot be preloaded: ignored.<br>apitrace: loaded into /usr/bin/basename<br>ERROR: ld.so: object '/home/benjamin/apitrace/build32/wrappers/glxtrace.so' from LD_PRELOAD cannot be preloaded: ignored.<br>apitrace: loaded into /usr/bin/basename<br>ERROR: ld.so: object '/home/benjamin/apitrace/build32/wrappers/glxtrace.so' from LD_PRELOAD cannot be preloaded: ignored.<br>apitrace: loaded into /usr/bin/basename<br>ERROR: ld.so: object '/home/benjamin/apitrace/build32/wrappers/glxtrace.so' from LD_PRELOAD cannot be preloaded: ignored.<br>apitrace: loaded into /usr/bin/basename<br>ERROR: ld.so: object '/home/benjamin/apitrace/build32/wrappers/glxtrace.so' from LD_PRELOAD cannot be preloaded: ignored.<br>apitrace: loaded into /usr/bin/basename<br>ERROR: ld.so: object '/home/benjamin/apitrace/build32/wrappers/glxtrace.so' from LD_PRELOAD cannot be preloaded: ignored.<br>apitrace: loaded into /usr/bin/basename<br>ERROR: ld.so: object '/home/benjamin/apitrace/build32/wrappers/glxtrace.so' from LD_PRELOAD cannot be preloaded: ignored.<br>apitrace: loaded into /usr/bin/basename<br>ERROR: ld.so: object '/home/benjamin/apitrace/build32/wrappers/glxtrace.so' from LD_PRELOAD cannot be preloaded: ignored.<br>apitrace: loaded into /usr/bin/basename<br>ERROR: ld.so: object '/home/benjamin/apitrace/build32/wrappers/glxtrace.so' from LD_PRELOAD cannot be preloaded: ignored.<br>apitrace: loaded into /usr/bin/sed<br>ERROR: ld.so: object '/home/benjamin/apitrace/build32/wrappers/glxtrace.so' from LD_PRELOAD cannot be preloaded: ignored.<br>apitrace: loaded into /usr/bin/sed<br>ERROR: ld.so: object '/home/benjamin/apitrace/build32/wrappers/glxtrace.so' from LD_PRELOAD cannot be preloaded: ignored.<br>apitrace: loaded into /usr/bin/sed<br>ERROR: ld.so: object '/home/benjamin/apitrace/build32/wrappers/glxtrace.so' from LD_PRELOAD cannot be preloaded: ignored.<br>apitrace: loaded into /usr/bin/sed<br>ERROR: ld.so: object '/home/benjamin/apitrace/build32/wrappers/glxtrace.so' from LD_PRELOAD cannot be preloaded: ignored.<br>apitrace: loaded into /usr/bin/sed<br>ERROR: ld.so: object '/home/benjamin/apitrace/build32/wrappers/glxtrace.so' from LD_PRELOAD cannot be preloaded: ignored.<br>apitrace: loaded into /usr/bin/tr<br>ERROR: ld.so: object '/home/benjamin/apitrace/build32/wrappers/glxtrace.so' from LD_PRELOAD cannot be preloaded: ignored.<br>apitrace: loaded into /usr/bin/bash<br>ERROR: ld.so: object '/home/benjamin/apitrace/build32/wrappers/glxtrace.so' from LD_PRELOAD cannot be preloaded: ignored.<br>apitrace: loaded into /usr/bin/cat<br>ERROR: ld.so: object '/home/benjamin/apitrace/build32/wrappers/glxtrace.so' from LD_PRELOAD cannot be preloaded: ignored.<br>apitrace: loaded into /usr/bin/cat<br>cat: /etc/debian_version: Aucun fichier ou dossier de ce type<br>ERROR: ld.so: object '/home/benjamin/apitrace/build32/wrappers/glxtrace.so' from LD_PRELOAD cannot be preloaded: ignored.<br>apitrace: loaded into /usr/bin/bash<br>ERROR: ld.so: object '/home/benjamin/apitrace/build32/wrappers/glxtrace.so' from LD_PRELOAD cannot be preloaded: ignored.<br>apitrace: loaded into /usr/bin/grep<br>ERROR: ld.so: object '/home/benjamin/apitrace/build32/wrappers/glxtrace.so' from LD_PRELOAD cannot be preloaded: ignored.<br>apitrace: loaded into /usr/bin/cat<br>Setting breakpad minidump AppID = 41070<br>Steam_SetMinidumpSteamID: Caching Steam ID: 76561197975475067 [API loaded no]<br>WRN: CPU Power saving is enabled and performance governor is not used.<br>INF: GameEnv API: Steam<br>INF: Encoded user ID = 28d03bc7:6f628ecf<br>apitrace: redirecting dlopen("libGL.so.1", 0x101)<br>apitrace: tracing to /home/benjamin/testmesa/ss3_tmp.trace<br>apitrace: redirecting dlopen("libGL.so.1", 0x102)<br>INF: <br>INF: * Desktop settings...<br>INF: Color depth: 32-bit<br>INF: Desktop resolution: 1680 x 1050<br>INF: Fullscreen on primary display<br>apitrace: redirecting dlopen("libGL.so.1", 0x101)<br>ERROR: ld.so: object '/home/benjamin/apitrace/build32/wrappers/glxtrace.so' from LD_PRELOAD cannot be preloaded: ignored.<br>lspci: /home/benjamin/.local/share/Steam/ubuntu12_32/steam-runtime/amd64/lib/x86_64-linux-gnu/libpci.so.3: version `LIBPCI_3.2' not found (required by lspci)<br>ERROR: ld.so: object '/home/benjamin/apitrace/build32/wrappers/glxtrace.so' from LD_PRELOAD cannot be preloaded: ignored.<br>lspci: /home/benjamin/.local/share/Steam/ubuntu12_32/steam-runtime/amd64/lib/x86_64-linux-gnu/libpci.so.3: version `LIBPCI_3.2' not found (required by lspci)<br>ERROR: ld.so: object '/home/benjamin/apitrace/build32/wrappers/glxtrace.so' from LD_PRELOAD cannot be preloaded: ignored.<br>lspci: /home/benjamin/.local/share/Steam/ubuntu12_32/steam-runtime/amd64/lib/x86_64-linux-gnu/libpci.so.3: version `LIBPCI_3.2' not found (required by lspci)<br>WRN: lspci: GPU vendor and/or device ID not detected!<br>apitrace: warning: _gl_param_size: unknown GLenum 0x87FC<br>apitrace: warning: _gl_param_size: unknown GLenum 0x87FC<br>WRN: [OpenGL] Unable to determine VRAM size... assuming 512 MB.<br>apitrace: warning: _gl_param_size: unknown GLenum 0x87FC<br>apitrace: warning: _gl_param_size: unknown GLenum 0x87FC<br>WRN: [OpenGL] "GL_ARB_get_program_binary" extension is present but not used because no binary formats are exposed.<br>INF: <br>INF: Gfx API: OpenGL<br>INF: Resolution: 1680 x 1050<br>INF: Vendor: unknown (0x0000)<br>INF: Driver: X.Org (0x0000)<br>INF: Renderer: Gallium 0.4 on AMD CYPRESS<br>INF: Version: 3.0 Mesa 10.3.2<br>INF: Video memory size: 512 MB<br>INF: Available for textures: 512 MB<br>INF: Active GPU(s): 1<br>INF: Unable to check for correct version of display driver!<br>INF: <br>INF: Sfx API: OpenAL<br>INF: Device: PulseAudio Default<br>INF: Mixer frequency: 44100 Hz<br>INF: Mixer voices: 64<br>INF: Max sound sources: 15<br>INF: Max total volume: 3<br>INF: Speaker config: (unknown)<br>INF: Environment FX: not supported<br>INF: <br>INF: Using cheats will invalidate your score for this level and achievements won't be awarded for the remainder of the game.<br>INF: AutoDetect: Hardware values unchanged, nothing to do.<br>INF: Started simulation on 'Content/SeriousSam3/Levels/Menu/Intro.wld' in 0.54 seconds.<br>INF: Started simulation on 'Content/SeriousSam3/Levels/Menu/MenuLevel.wld' in 0.26 seconds.<br>INF: Started simulation on 'Content/SeriousSam3/Levels/Z5_Other/SV_Canyon.wld' in 5.47 seconds.<br><br><br></div><div>I suspect something is wrong in the manner I'm capturing the trace.<br></div><div><div><div><div><div><div><div><div><div><div><div><br><div class="gmail_extra"><br><div class="gmail_quote">2014-11-05 23:19 GMT+01:00 José Fonseca <span dir="ltr"><<a href="mailto:jose.r.fonseca@gmail.com" target="_blank">jose.r.fonseca@gmail.com</a>></span>:<br><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-style:solid;border-left-color:rgb(204,204,204);padding-left:1ex"><div dir="ltr"><br><div class="gmail_extra"><br><div class="gmail_quote"><span>On Wed, Nov 5, 2014 at 6:22 PM, Benjamin Bellec <span dir="ltr"><<a href="mailto:b.bellec@gmail.com" target="_blank">b.bellec@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-style:solid;border-left-color:rgb(204,204,204);padding-left:1ex"><div dir="ltr"><div>Yes I confirm that the weapons are *always* correctly rendered while tracing. The corruption only appears in the apitrace.<br></div></div></blockquote><div><br></div></span><div>Wow. This is one of the weirdest things i've seen.</div><span><div> </div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-style:solid;border-left-color:rgb(204,204,204);padding-left:1ex"><div dir="ltr"><div>Anyway thanks for this explanation.<br>So, do you think a hardware (physical) problem can be the origin of this ?<br></div><div>Or more probably a software one ? </div></div></blockquote><div><br></div><div><br></div><div><br></div><div><br></div></span><div>Please do two more experiments:</div><div><br></div><div>1. Undo any previous changes to apitrace tree, apply the attached patch zlib.patch and see if it helps. </div><div><br></div><div> This will force apitrace to compress with zlib instead of snappy, so eliminate the chance that the bug is not on glMapBufferRange but inside snappy somehow.</div><div><br></div><div></div><div>2. Ditto with pin-thread-on-cpu.patch.<br></div><div><br></div><div> If this is a problem due to stale CPU cache this might help.</div><div><br></div><div>3. Ditto with glfinish.patch</div><div><br></div><div> If GPU is the one scribbling over then this call should make the issue either never happen or happen all the time.</div><div><br></div><div>4. try tracing the replay of the good ss3_correct_without_patch.trace like<br></div><div><div><br></div><div> ./apitrace trace ./glretrace -b ss3_correct_without_patch.trace</div><div><br></div><div>a few times, and check whether the replays are as good as ss3_correct_without_patch.trace, or if they regress some times, like the real app does. This might help determine whether the ss3 application is doing something special, or not.</div><div><br></div></div><span><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-style:solid;border-left-color:rgb(204,204,204);padding-left:1ex"><div dir="ltr"><div>Because I was surprised, indeed, I have another problematic bug that occurs, aparently with glMapBufferRange() too, see <a href="https://bugs.freedesktop.org/show_bug.cgi?id=77596" target="_blank">BUGZILLA #77596 </a>particularly my #7 comments. Maybe this is just coincidence. I'm not an OpenGL developper so I don't know where the glMapBufferRange's "lenght" parameter come from ? (from the game or from the OpenGL driver itself).<br></div></div></blockquote><div><br></div></span><div>It's hard to say whether it's related. glMapBufferRange's length parameter is specified by the app, but the app could be computing that value based on glGet* queries done to the OpenGL driver, and some times there are bugs.</div><span><div> </div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-style:solid;border-left-color:rgb(204,204,204);padding-left:1ex"><div dir="ltr"><div><br></div><div>To sum up, what do you think I should do now ? Fill a bug against the OpenGL driver ?<br></div></div><div><div><div class="gmail_extra"><br></div></div></div></blockquote><div> </div></span><div>Let's see if the above experiments help narrow this further.</div><div><br></div><div><br></div><div>I really hate when apitrace is not able to capture something properly -- it's like most basic of basic functionality -- everything else (replay, UI, state dumping) can be fixed improved after the fact, but if the trace itself can't be trusted then that's showstopper. So fingers crossed..</div><div><br></div><div><br></div><div>Jose</div><div> </div></div></div></div> </blockquote></div><br></div></div></div></div></div></div></div></div></div></div></div></div></div> </blockquote></div><br></div></div></div></div></div> </blockquote></div><br></div> </div></div></blockquote></div><br></div> </div></div></blockquote></div><br></div>