drm.buffer.peak.stats A read-only flat-keyed file which exists on all cgroups. Each entry is keyed by the drm device's major:minor.
Largest (high water mark) GEM buffer allocated in bytes.
Change-Id: I40fe4c13c1cea8613b3e04b802f3e1f19eaab4fc Signed-off-by: Kenny Ho Kenny.Ho@amd.com --- Documentation/admin-guide/cgroup-v2.rst | 6 ++++++ include/linux/cgroup_drm.h | 3 +++ kernel/cgroup/drm.c | 12 ++++++++++++ 3 files changed, 21 insertions(+)
diff --git a/Documentation/admin-guide/cgroup-v2.rst b/Documentation/admin-guide/cgroup-v2.rst index 2d8162c109f3..75b97962b127 100644 --- a/Documentation/admin-guide/cgroup-v2.rst +++ b/Documentation/admin-guide/cgroup-v2.rst @@ -2069,6 +2069,12 @@ DRM Interface Files
Total GEM buffer allocation in bytes.
+ drm.buffer.peak.stats + A read-only flat-keyed file which exists on all cgroups. Each + entry is keyed by the drm device's major:minor. + + Largest (high water mark) GEM buffer allocated in bytes. + GEM Buffer Ownership ~~~~~~~~~~~~~~~~~~~~
diff --git a/include/linux/cgroup_drm.h b/include/linux/cgroup_drm.h index 174ab50701ef..593ad12602cd 100644 --- a/include/linux/cgroup_drm.h +++ b/include/linux/cgroup_drm.h @@ -13,6 +13,7 @@
enum drmcg_res_type { DRMCG_TYPE_BO_TOTAL, + DRMCG_TYPE_BO_PEAK, __DRMCG_TYPE_LAST, };
@@ -24,6 +25,8 @@ enum drmcg_res_type { struct drmcg_device_resource { /* for per device stats */ s64 bo_stats_total_allocated; + + s64 bo_stats_peak_allocated; };
/** diff --git a/kernel/cgroup/drm.c b/kernel/cgroup/drm.c index 425566753a5c..7a0da70c5a25 100644 --- a/kernel/cgroup/drm.c +++ b/kernel/cgroup/drm.c @@ -277,6 +277,9 @@ static void drmcg_print_stats(struct drmcg_device_resource *ddr, case DRMCG_TYPE_BO_TOTAL: seq_printf(sf, "%lld\n", ddr->bo_stats_total_allocated); break; + case DRMCG_TYPE_BO_PEAK: + seq_printf(sf, "%lld\n", ddr->bo_stats_peak_allocated); + break; default: seq_puts(sf, "\n"); break; @@ -325,6 +328,12 @@ struct cftype files[] = { .private = DRMCG_CTF_PRIV(DRMCG_TYPE_BO_TOTAL, DRMCG_FTYPE_STATS), }, + { + .name = "buffer.peak.stats", + .seq_show = drmcg_seq_show, + .private = DRMCG_CTF_PRIV(DRMCG_TYPE_BO_PEAK, + DRMCG_FTYPE_STATS), + }, { } /* terminate */ };
@@ -373,6 +382,9 @@ void drmcg_chg_bo_alloc(struct drmcg *drmcg, struct drm_device *dev, ddr = drmcg->dev_resources[devIdx];
ddr->bo_stats_total_allocated += (s64)size; + + if (ddr->bo_stats_peak_allocated < (s64)size) + ddr->bo_stats_peak_allocated = (s64)size; } mutex_unlock(&dev->drmcg_mutex); }