From: Dave Airlie <airlied@redhat.com>
Date: Wed, 25 Jul 2018 03:14:58 +0000 (+1000)
Subject: r600: reduce num compute threads to 1024.
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=9039cf70fa0b785f390c649486e12d6c10e9142b;p=mesa.git

r600: reduce num compute threads to 1024.

I copied this value from radeonsi, but it was wrong, 1024
seems to be correct answer from looking at gpuinfo.

This should fix a few compute shader related hangs. (at least in CTS)

Cc: <mesa-stable@lists.freedesktop.org>
(airlied: pushed because it avoids hangs)
---

diff --git a/src/gallium/drivers/r600/r600_pipe_common.c b/src/gallium/drivers/r600/r600_pipe_common.c
index a8ea9c44854..f7cfd0d46a6 100644
--- a/src/gallium/drivers/r600/r600_pipe_common.c
+++ b/src/gallium/drivers/r600/r600_pipe_common.c
@@ -998,7 +998,7 @@ static unsigned get_max_threads_per_block(struct r600_common_screen *screen,
 	if (ir_type != PIPE_SHADER_IR_TGSI)
 		return 256;
 	if (screen->chip_class >= EVERGREEN)
-		return 2048;
+		return 1024;
 	return 256;
 }