On 09/01/2024 07:56, Christian König wrote:
Am 07.12.23 um 19:02 schrieb Alex Deucher:
Add shared stats. Useful for seeing shared memory.
v2: take dma-buf into account as well
Signed-off-by: Alex Deucher <alexander.deucher@xxxxxxx>
Cc: Rob Clark <robdclark@xxxxxxxxx>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_fdinfo.c | 4 ++++
drivers/gpu/drm/amd/amdgpu/amdgpu_object.c | 11 +++++++++++
drivers/gpu/drm/amd/amdgpu/amdgpu_object.h | 6 ++++++
3 files changed, 21 insertions(+)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_fdinfo.c
b/drivers/gpu/drm/amd/amdgpu/amdgpu_fdinfo.c
index 5706b282a0c7..c7df7fa3459f 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_fdinfo.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_fdinfo.c
@@ -97,6 +97,10 @@ void amdgpu_show_fdinfo(struct drm_printer *p,
struct drm_file *file)
stats.requested_visible_vram/1024UL);
drm_printf(p, "amd-requested-gtt:\t%llu KiB\n",
stats.requested_gtt/1024UL);
+ drm_printf(p, "drm-shared-vram:\t%llu KiB\n",
stats.vram_shared/1024UL);
+ drm_printf(p, "drm-shared-gtt:\t%llu KiB\n",
stats.gtt_shared/1024UL);
+ drm_printf(p, "drm-shared-cpu:\t%llu KiB\n",
stats.cpu_shared/1024UL);
+
for (hw_ip = 0; hw_ip < AMDGPU_HW_IP_NUM; ++hw_ip) {
if (!usage[hw_ip])
continue;
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
index d79b4ca1ecfc..1b37d95475b8 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
@@ -1287,25 +1287,36 @@ void amdgpu_bo_get_memory(struct amdgpu_bo *bo,
struct amdgpu_mem_stats *stats)
{
uint64_t size = amdgpu_bo_size(bo);
+ struct drm_gem_object *obj;
unsigned int domain;
+ bool shared;
/* Abort if the BO doesn't currently have a backing store */
if (!bo->tbo.resource)
return;
+ obj = &bo->tbo.base;
+ shared = (obj->handle_count > 1) || obj->dma_buf;
I still think that looking at handle_count is the completely wrong
approach, we should really only look at obj->dma_buf.
Yeah it is all a bit tricky with the handle table walk. I don't think it
is even possible to claim it is shared with obj->dma_buf could be the
same process creating say via udmabuf and importing into drm. It is a
wild scenario yes, but it could be private memory in that case. Not sure
where it would leave us if we said this is just a limitation of a BO
based tracking.
Would adding a new category "imported" help?
Hmm or we simply change drm-usage-stats.rst:
"""
- drm-shared-<region>: <uint> [KiB|MiB]
The total size of buffers that are shared with another file (ie. have
more than than a single handle).
"""
Changing ie into eg coule be get our of jail free card to allow the
"(obj->handle_count > 1) || obj->dma_buf;" condition?
Because of the shared with another _file_ wording would cover my wild
udmabuf self-import case. Unless there are more such creative private
import options.
Regards,
Tvrtko
Regards,
Christian.
+
domain = amdgpu_mem_type_to_domain(bo->tbo.resource->mem_type);
switch (domain) {
case AMDGPU_GEM_DOMAIN_VRAM:
stats->vram += size;
if (amdgpu_bo_in_cpu_visible_vram(bo))
stats->visible_vram += size;
+ if (shared)
+ stats->vram_shared += size;
break;
case AMDGPU_GEM_DOMAIN_GTT:
stats->gtt += size;
+ if (shared)
+ stats->gtt_shared += size;
break;
case AMDGPU_GEM_DOMAIN_CPU:
default:
stats->cpu += size;
+ if (shared)
+ stats->cpu_shared += size;
break;
}
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.h
b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.h
index d28e21baef16..0503af75dc26 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.h
@@ -138,12 +138,18 @@ struct amdgpu_bo_vm {
struct amdgpu_mem_stats {
/* current VRAM usage, includes visible VRAM */
uint64_t vram;
+ /* current shared VRAM usage, includes visible VRAM */
+ uint64_t vram_shared;
/* current visible VRAM usage */
uint64_t visible_vram;
/* current GTT usage */
uint64_t gtt;
+ /* current shared GTT usage */
+ uint64_t gtt_shared;
/* current system memory usage */
uint64_t cpu;
+ /* current shared system memory usage */
+ uint64_t cpu_shared;
/* sum of evicted buffers, includes visible VRAM */
uint64_t evicted_vram;
/* sum of evicted buffers due to CPU access */
