From f11365d8dc0becc42a21c3bfa1725b647b3f552c Mon Sep 17 00:00:00 2001
From: Matthew Brost <matthew.brost@intel.com>
Date: Fri, 21 Jan 2022 16:08:22 -0800
Subject: drm/i915/selftests: Use less in contexts steal guc id test
Git-commit: 29c52ab2711f0e8ce506c120fbecb30e83f83339
Patch-mainline: v5.18-rc1
References: jsc#PED-1166 jsc#PED-1168 jsc#PED-1170 jsc#PED-1218 jsc#PED-1220 jsc#PED-1222 jsc#PED-1223 jsc#PED-1225
Using more guc_ids in the stealing guc id test has no real benefit.
Tearing down lots of contexts all at the same time takes a bit of time
due to the H2G / G2H ping-pong with the GuC. On some slower platforms
this can cause timeous when flushing the test as the GT isn't idle when
this ping-pong is happening. Reduce the number of guc ids to speed up
the flushing of the test.
Link: https://gitlab.freedesktop.org/drm/intel/-/issues/4821
Signed-off-by: Matthew Brost <matthew.brost@intel.com>
Reviewed-by: Matthew Auld <matthew.auld@intel.com>
Signed-off-by: John Harrison <John.C.Harrison@Intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220122000822.25616-1-matthew.brost@intel.com
Acked-by: Patrik Jakobsson <pjakobsson@suse.de>
---
drivers/gpu/drm/i915/gt/uc/selftest_guc.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/i915/gt/uc/selftest_guc.c b/drivers/gpu/drm/i915/gt/uc/selftest_guc.c
index d3327b802b76..a115894d5896 100644
--- a/drivers/gpu/drm/i915/gt/uc/selftest_guc.c
+++ b/drivers/gpu/drm/i915/gt/uc/selftest_guc.c
@@ -157,7 +157,7 @@ static int intel_guc_steal_guc_ids(void *arg)
wakeref = intel_runtime_pm_get(gt->uncore->rpm);
engine = intel_selftest_find_any_engine(gt);
sv = guc->submission_state.num_guc_ids;
- guc->submission_state.num_guc_ids = 4096;
+ guc->submission_state.num_guc_ids = 512;
/* Create spinner to block requests in below loop */
ce[context_index] = intel_context_create(engine);
--
2.38.1