| Bug ID | 97273 |
|---|---|
| Summary | [r600g, bisected] regression: NI/Turks WebGL (FishGL) massive speed decrease ~33% |
| Product | Mesa |
| Version | git |
| Hardware | x86-64 (AMD64) |
| OS | Linux (All) |
| Status | NEW |
| Severity | normal |
| Priority | medium |
| Component | Drivers/Gallium/r600 |
| Assignee | dri-devel@lists.freedesktop.org |
| Reporter | Dieter@nuetzel-hh.de |
| QA Contact | dri-devel@lists.freedesktop.org |
Current Mesa (git-3f100b7) and some stable versions show massive speed decrease on FishGL (WebGL) demo with konqueror 4.14.8 (KDE 4.14.9). http://www.fishgl.com/ look at the aquarium: ~60 fps -> ~40 fps look from inside (diver): ~30 fps -> ~20 fps I've bisected it to: /opt/mesa> git bisect good 3735a925ef5692c836c4d26d6adee370dae1c2b0 is the first bad commit commit 3735a925ef5692c836c4d26d6adee370dae1c2b0 Author: Nicolai Hähnle <nicolai.haehnle@amd.com> Date: Wed Jun 8 13:24:14 2016 +0200 st/mesa: cache staging texture for glReadPixels v2: add ST_DEBUG flag for disabling (suggested by Ilia) Reviewed-by: Marek Olšák <marek.olsak@amd.com> (v1) :040000 040000 f3adb5adc43e4def32bd23896489520d8cae84c6 72b374e2221e9cc1306d7bfacf39780ec5e42d36 Msrc https://cgit.freedesktop.org/mesa/mesa/log/?ofs=1150 Revert didn't went smooth, so I've commented: diff --git a/src/mesa/state_tracker/st_cb_readpixels.c b/src/mesa/state_tracker/st_cb_readpixels.c index 8eb839d..3af9530 100644 --- a/src/mesa/state_tracker/st_cb_readpixels.c +++ b/src/mesa/state_tracker/st_cb_readpixels.c @@ -329,7 +329,7 @@ try_cached_readpixels(struct st_context *st, struct st_renderbuffer *strb, struct pipe_resource *src = "" struct pipe_resource *dst = NULL; - if (ST_DEBUG & DEBUG_NOREADPIXCACHE) + /* if (ST_DEBUG & DEBUG_NOREADPIXCACHE) */ return NULL; /* Reset cache after invalidation or switch of parameters. */ After that speed was 'normal'.
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