Commit 05a24968 authored by Rob Clark's avatar Rob Clark
Browse files

drm/msm: Add mmu prealloc tracepoint 



So we can monitor how many pages are getting preallocated vs how many
get used.

Signed-off-by: default avatarRob Clark <robdclark@chromium.org>
Signed-off-by: default avatarRob Clark <robin.clark@oss.qualcomm.com>
Tested-by: default avatarAntonino Maniscalco <antomani103@gmail.com>
Reviewed-by: default avatarAntonino Maniscalco <antomani103@gmail.com>
Patchwork: https://patchwork.freedesktop.org/patch/661521/
parent 0b4339c5

drivers/gpu/drm/msm/msm_gpu_trace.h

+14 −0
Original line number Diff line number Diff line
@@ -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

drivers/gpu/drm/msm/msm_iommu.c

+4 −0
Original line number Diff line number Diff line
@@ -8,6 +8,7 @@ 
#include <linux/io-pgtable.h>

#include <linux/kmemleak.h>

#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);

}