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-rw-r--r--meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.14.71/1080-drm-amdgpu-use-multipipe-compute-policy-on-non-PL11-.patch56
1 files changed, 56 insertions, 0 deletions
diff --git a/meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.14.71/1080-drm-amdgpu-use-multipipe-compute-policy-on-non-PL11-.patch b/meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.14.71/1080-drm-amdgpu-use-multipipe-compute-policy-on-non-PL11-.patch
new file mode 100644
index 00000000..8e60419a
--- /dev/null
+++ b/meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.14.71/1080-drm-amdgpu-use-multipipe-compute-policy-on-non-PL11-.patch
@@ -0,0 +1,56 @@
+From 02c7e221a0ce6d03bb1faca3cb1ed7db4890ed20 Mon Sep 17 00:00:00 2001
+From: Andres Rodriguez <andresx7@gmail.com>
+Date: Tue, 26 Sep 2017 12:22:45 -0400
+Subject: [PATCH 1080/4131] drm/amdgpu: use multipipe compute policy on non
+ PL11 asics
+
+A performance regression for OpenCL tests on Polaris11 had this feature
+disabled for all asics.
+
+Instead, disable it selectively on the affected asics.
+
+Acked-by: Felix Kuehling <Felix.Kuehling@amd.com>
+Signed-off-by: Andres Rodriguez <andresx7@gmail.com>
+Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
+---
+ drivers/gpu/drm/amd/amdgpu/amdgpu_gfx.c | 14 ++++++++++++--
+ 1 file changed, 12 insertions(+), 2 deletions(-)
+
+diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_gfx.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_gfx.c
+index 4f6c68f..3d76e76 100644
+--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_gfx.c
++++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_gfx.c
+@@ -109,9 +109,20 @@ void amdgpu_gfx_parse_disable_cu(unsigned *mask, unsigned max_se, unsigned max_s
+ }
+ }
+
++static bool amdgpu_gfx_is_multipipe_capable(struct amdgpu_device *adev)
++{
++ /* FIXME: spreading the queues across pipes causes perf regressions
++ * on POLARIS11 compute workloads */
++ if (adev->asic_type == CHIP_POLARIS11)
++ return false;
++
++ return adev->gfx.mec.num_mec > 1;
++}
++
+ void amdgpu_gfx_compute_queue_acquire(struct amdgpu_device *adev)
+ {
+ int i, queue, pipe, mec;
++ bool multipipe_policy = amdgpu_gfx_is_multipipe_capable(adev);
+
+ /* policy for amdgpu compute queue ownership */
+ for (i = 0; i < AMDGPU_MAX_COMPUTE_QUEUES; ++i) {
+@@ -125,8 +136,7 @@ void amdgpu_gfx_compute_queue_acquire(struct amdgpu_device *adev)
+ if (mec >= adev->gfx.mec.num_mec)
+ break;
+
+- /* FIXME: spreading the queues across pipes causes perf regressions */
+- if (0) {
++ if (multipipe_policy) {
+ /* policy: amdgpu owns the first two queues of the first MEC */
+ if (mec == 0 && queue < 2)
+ set_bit(i, adev->gfx.mec.queue_bitmap);
+--
+2.7.4
+