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* [PATCH] tracing/gpu: Add gpu_mem_imported tracepoint
@ 2021-07-26 16:41 Kalesh Singh
  2021-08-16 17:22 ` Ørjan Eide
  0 siblings, 1 reply; 3+ messages in thread
From: Kalesh Singh @ 2021-07-26 16:41 UTC (permalink / raw)
  Cc: gregkh, surenb, hridya, john.reitan, orjan.eide, mark.underwood,
	gary.sweet, stephen.mansfield, mbalci, mkrom, kernel-team,
	Kalesh Singh, Steven Rostedt, Ingo Molnar, linux-kernel

The existing gpu_mem_total tracepoint allows GPU drivers a unifrom way
to report the per-process and system-wide GPU memory usage. This
tracepoint reports a single total of the GPU private allocations and the
imported memory. [1]

To allow distinguishing GPU private vs imported memory, add
gpu_mem_imported tracepoint.

GPU drivers can use this tracepoint to report the per-process and global
GPU-imported memory in a uniform way.

For backward compatility with already existing implementations of
gpu_mem_total by various Android GPU drivers, this is proposed as a new
tracepoint rather than additional args to gpu_mem_total.

[1] https://lore.kernel.org/r/20200302234840.57188-1-zzyiwei@google.com/

Signed-off-by: Kalesh Singh <kaleshsingh@google.com>
---
 include/trace/events/gpu_mem.h | 51 ++++++++++++++++++++++++----------
 1 file changed, 36 insertions(+), 15 deletions(-)

diff --git a/include/trace/events/gpu_mem.h b/include/trace/events/gpu_mem.h
index 26d871f96e94..b9543abf1461 100644
--- a/include/trace/events/gpu_mem.h
+++ b/include/trace/events/gpu_mem.h
@@ -13,21 +13,7 @@
 
 #include <linux/tracepoint.h>
 
-/*
- * The gpu_memory_total event indicates that there's an update to either the
- * global or process total gpu memory counters.
- *
- * This event should be emitted whenever the kernel device driver allocates,
- * frees, imports, unimports memory in the GPU addressable space.
- *
- * @gpu_id: This is the gpu id.
- *
- * @pid: Put 0 for global total, while positive pid for process total.
- *
- * @size: Size of the allocation in bytes.
- *
- */
-TRACE_EVENT(gpu_mem_total,
+DECLARE_EVENT_CLASS(gpu_mem_template,
 
 	TP_PROTO(uint32_t gpu_id, uint32_t pid, uint64_t size),
 
@@ -51,6 +37,41 @@ TRACE_EVENT(gpu_mem_total,
 		__entry->size)
 );
 
+/*
+ * The gpu_memory_total event indicates that there's an update to either the
+ * global or process total gpu memory counters.
+ *
+ * This event should be emitted whenever the kernel device driver allocates,
+ * frees, imports, unimports memory in the GPU addressable space.
+ *
+ * @gpu_id: This is the gpu id.
+ *
+ * @pid: Put 0 for global total, while positive pid for process total.
+ *
+ * @size: Size of the allocation in bytes.
+ *
+ */
+DEFINE_EVENT(gpu_mem_template, gpu_mem_total,
+	TP_PROTO(uint32_t gpu_id, uint32_t pid, uint64_t size),
+	TP_ARGS(gpu_id, pid, size));
+
+/*
+ * The gpu_mem_imported event indicates that there's an update to the
+ * global or process imported gpu memory counters.
+ *
+ * This event should be emitted whenever the kernel device driver imports
+ * or unimports memory (allocated externally) in the GPU addressable space.
+ *
+ * @gpu_id: This is the gpu id.
+ *
+ * @pid: Put 0 for global total, while positive pid for process total.
+ *
+ * @size: Size of the imported memory in bytes.
+ */
+DEFINE_EVENT(gpu_mem_template, gpu_mem_imported,
+	TP_PROTO(uint32_t gpu_id, uint32_t pid, uint64_t size),
+	TP_ARGS(gpu_id, pid, size));
+
 #endif /* _TRACE_GPU_MEM_H */
 
 /* This part must be outside protection */

base-commit: ff1176468d368232b684f75e82563369208bc371
-- 
2.32.0.432.gabb21c7263-goog


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2021-07-26 16:41 [PATCH] tracing/gpu: Add gpu_mem_imported tracepoint Kalesh Singh
2021-08-16 17:22 ` Ørjan Eide
2021-08-16 19:46   ` Kalesh Singh

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