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From: SeongJae Park <sjpark@amazon.com>
To: <akpm@linux-foundation.org>
Cc: SeongJae Park <sjpark@amazon.de>, <Jonathan.Cameron@Huawei.com>,
	<aarcange@redhat.com>, <acme@kernel.org>,
	<alexander.shishkin@linux.intel.com>, <amit@kernel.org>,
	<benh@kernel.crashing.org>, <brendan.d.gregg@gmail.com>,
	<brendanhiggins@google.com>, <cai@lca.pw>,
	<colin.king@canonical.com>, <corbet@lwn.net>, <dwmw@amazon.com>,
	<irogers@google.com>, <jolsa@redhat.com>, <kirill@shutemov.name>,
	<mark.rutland@arm.com>, <mgorman@suse.de>, <minchan@kernel.org>,
	<mingo@redhat.com>, <namhyung@kernel.org>, <peterz@infradead.org>,
	<rdunlap@infradead.org>, <riel@surriel.com>,
	<rientjes@google.com>, <rostedt@goodmis.org>, <sblbir@amazon.com>,
	<shakeelb@google.com>, <shuah@kernel.org>, <sj38.park@gmail.com>,
	<snu@amazon.de>, <vbabka@suse.cz>, <vdavydov.dev@gmail.com>,
	<yang.shi@linux.alibaba.com>, <ying.huang@intel.com>,
	<linux-damon@amazon.com>, <linux-mm@kvack.org>,
	<linux-doc@vger.kernel.org>, <linux-kernel@vger.kernel.org>
Subject: [PATCH v11 11/16] mm/damon: Add tracepoints
Date: Mon, 11 May 2020 14:32:57 +0200
Message-ID: <20200511123302.12520-12-sjpark@amazon.com> (raw)
In-Reply-To: <20200511123302.12520-1-sjpark@amazon.com>

From: SeongJae Park <sjpark@amazon.de>

This commit adds a tracepoint for DAMON.  It traces the monitoring
results of each region for each aggregation interval.  Using this, DAMON
will be easily integrated with any tracepoints supporting tools such as
perf.

Signed-off-by: SeongJae Park <sjpark@amazon.de>
---
 include/trace/events/damon.h | 43 ++++++++++++++++++++++++++++++++++++
 mm/damon.c                   |  5 +++++
 2 files changed, 48 insertions(+)
 create mode 100644 include/trace/events/damon.h

diff --git a/include/trace/events/damon.h b/include/trace/events/damon.h
new file mode 100644
index 000000000000..22236642d366
--- /dev/null
+++ b/include/trace/events/damon.h
@@ -0,0 +1,43 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#undef TRACE_SYSTEM
+#define TRACE_SYSTEM damon
+
+#if !defined(_TRACE_DAMON_H) || defined(TRACE_HEADER_MULTI_READ)
+#define _TRACE_DAMON_H
+
+#include <linux/types.h>
+#include <linux/tracepoint.h>
+
+TRACE_EVENT(damon_aggregated,
+
+	TP_PROTO(int pid, unsigned int nr_regions,
+		unsigned long vm_start, unsigned long vm_end,
+		unsigned int nr_accesses),
+
+	TP_ARGS(pid, nr_regions, vm_start, vm_end, nr_accesses),
+
+	TP_STRUCT__entry(
+		__field(int, pid)
+		__field(unsigned int, nr_regions)
+		__field(unsigned long, vm_start)
+		__field(unsigned long, vm_end)
+		__field(unsigned int, nr_accesses)
+	),
+
+	TP_fast_assign(
+		__entry->pid = pid;
+		__entry->nr_regions = nr_regions;
+		__entry->vm_start = vm_start;
+		__entry->vm_end = vm_end;
+		__entry->nr_accesses = nr_accesses;
+	),
+
+	TP_printk("pid=%d nr_regions=%u %lu-%lu: %u", __entry->pid,
+			__entry->nr_regions, __entry->vm_start,
+			__entry->vm_end, __entry->nr_accesses)
+);
+
+#endif /* _TRACE_DAMON_H */
+
+/* This part must be outside protection */
+#include <trace/define_trace.h>
diff --git a/mm/damon.c b/mm/damon.c
index 7a6525b708b6..ee117e920b39 100644
--- a/mm/damon.c
+++ b/mm/damon.c
@@ -9,6 +9,8 @@
 
 #define pr_fmt(fmt) "damon: " fmt
 
+#define CREATE_TRACE_POINTS
+
 #include <linux/damon.h>
 #include <linux/debugfs.h>
 #include <linux/delay.h>
@@ -20,6 +22,7 @@
 #include <linux/sched/mm.h>
 #include <linux/sched/task.h>
 #include <linux/slab.h>
+#include <trace/events/damon.h>
 
 /* Minimal region size.  Every damon_region is aligned by this. */
 #define MIN_REGION PAGE_SIZE
@@ -650,6 +653,8 @@ static void kdamond_reset_aggregated(struct damon_ctx *c)
 			damon_write_rbuf(c, &r->vm_end, sizeof(r->vm_end));
 			damon_write_rbuf(c, &r->nr_accesses,
 					sizeof(r->nr_accesses));
+			trace_damon_aggregated(t->pid, nr,
+					r->vm_start, r->vm_end, r->nr_accesses);
 			r->nr_accesses = 0;
 		}
 	}
-- 
2.17.1



  parent reply index

Thread overview: 17+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-05-11 12:32 [PATCH v11 00/16] Introduce Data Access MONitor (DAMON) SeongJae Park
2020-05-11 12:32 ` [PATCH v11 01/16] scripts/spelling: Add a few more typos SeongJae Park
2020-05-11 12:32 ` [PATCH v11 02/16] mm/page_ext: Export lookup_page_ext() to GPL modules SeongJae Park
2020-05-11 12:32 ` [PATCH v11 03/16] mm: Introduce Data Access MONitor (DAMON) SeongJae Park
2020-05-11 12:32 ` [PATCH v11 04/16] mm/damon: Implement region based sampling SeongJae Park
2020-05-11 12:32 ` [PATCH v11 05/16] mm/damon: Adaptively adjust regions SeongJae Park
2020-05-11 12:32 ` [PATCH v11 06/16] mm/damon: Split regions into 3 subregions if necessary SeongJae Park
2020-05-11 12:32 ` [PATCH v11 07/16] mm/damon: Apply dynamic memory mapping changes SeongJae Park
2020-05-11 12:32 ` [PATCH v11 08/16] mm/damon: Implement callbacks SeongJae Park
2020-05-11 12:32 ` [PATCH v11 09/16] mm/damon: Implement access pattern recording SeongJae Park
2020-05-11 12:32 ` [PATCH v11 10/16] mm/damon: Add debugfs interface SeongJae Park
2020-05-11 12:32 ` SeongJae Park [this message]
2020-05-11 12:32 ` [PATCH v11 12/16] tools: Add a minimal user-space tool for DAMON SeongJae Park
2020-05-11 12:32 ` [PATCH v11 13/16] Documentation/admin-guide/mm: Add a document " SeongJae Park
2020-05-11 12:33 ` [PATCH v11 14/16] mm/damon: Add kunit tests SeongJae Park
2020-05-11 12:33 ` [PATCH v11 15/16] mm/damon: Add user space selftests SeongJae Park
2020-05-11 12:33 ` [PATCH v11 16/16] MAINTAINERS: Update for DAMON SeongJae Park

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