From 05a249683455bf1099de28d7f189c6013aae4794 Mon Sep 17 00:00:00 2001 From: Rob Clark Date: Sun, 29 Jun 2025 13:13:21 -0700 Subject: [PATCH] drm/msm: Add mmu prealloc tracepoint So we can monitor how many pages are getting preallocated vs how many get used. Signed-off-by: Rob Clark Signed-off-by: Rob Clark Tested-by: Antonino Maniscalco Reviewed-by: Antonino Maniscalco Patchwork: https://patchwork.freedesktop.org/patch/661521/ --- drivers/gpu/drm/msm/msm_gpu_trace.h | 14 ++++++++++++++ drivers/gpu/drm/msm/msm_iommu.c | 4 ++++ 2 files changed, 18 insertions(+) diff --git a/drivers/gpu/drm/msm/msm_gpu_trace.h b/drivers/gpu/drm/msm/msm_gpu_trace.h index 7f863282db0d7..781bbe5540bde 100644 --- a/drivers/gpu/drm/msm/msm_gpu_trace.h +++ b/drivers/gpu/drm/msm/msm_gpu_trace.h @@ -205,6 +205,20 @@ TRACE_EVENT(msm_gpu_preemption_irq, TP_printk("preempted to %u", __entry->ring_id) ); +TRACE_EVENT(msm_mmu_prealloc_cleanup, + TP_PROTO(u32 count, u32 remaining), + TP_ARGS(count, remaining), + TP_STRUCT__entry( + __field(u32, count) + __field(u32, remaining) + ), + TP_fast_assign( + __entry->count = count; + __entry->remaining = remaining; + ), + TP_printk("count=%u, remaining=%u", __entry->count, __entry->remaining) +); + #endif #undef TRACE_INCLUDE_PATH diff --git a/drivers/gpu/drm/msm/msm_iommu.c b/drivers/gpu/drm/msm/msm_iommu.c index 887c9023f8a2b..55c29f49b7889 100644 --- a/drivers/gpu/drm/msm/msm_iommu.c +++ b/drivers/gpu/drm/msm/msm_iommu.c @@ -8,6 +8,7 @@ #include #include #include "msm_drv.h" +#include "msm_gpu_trace.h" #include "msm_mmu.h" struct msm_iommu { @@ -346,6 +347,9 @@ msm_iommu_pagetable_prealloc_cleanup(struct msm_mmu *mmu, struct msm_mmu_preallo struct kmem_cache *pt_cache = get_pt_cache(mmu); uint32_t remaining_pt_count = p->count - p->ptr; + if (p->count > 0) + trace_msm_mmu_prealloc_cleanup(p->count, remaining_pt_count); + kmem_cache_free_bulk(pt_cache, remaining_pt_count, &p->pages[p->ptr]); kvfree(p->pages); } -- 2.47.2