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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>,
	<foersleo@amazon.de>, <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>, <david@redhat.com>,
	<linux-damon@amazon.com>, <linux-mm@kvack.org>,
	<linux-doc@vger.kernel.org>, <linux-kernel@vger.kernel.org>
Subject: [PATCH v15 09/14] mm/damon: Add tracepoints
Date: Mon, 8 Jun 2020 13:40:42 +0200
Message-ID: <20200608114047.26589-10-sjpark@amazon.com> (raw)
In-Reply-To: <20200608114047.26589-1-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>
Reviewed-by: Leonard Foerster <foersleo@amazon.de>
---
 include/trace/events/damon.h | 43 ++++++++++++++++++++++++++++++++++++
 mm/damon.c                   |  4 ++++
 2 files changed, 47 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..fd260463d5b8
--- /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/damon.h>
+#include <linux/types.h>
+#include <linux/tracepoint.h>
+
+TRACE_EVENT(damon_aggregated,
+
+	TP_PROTO(struct damon_task *t, struct damon_region *r,
+		unsigned int nr_regions),
+
+	TP_ARGS(t, r, nr_regions),
+
+	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 = t->pid;
+		__entry->nr_regions = nr_regions;
+		__entry->vm_start = r->vm_start;
+		__entry->vm_end = r->vm_end;
+		__entry->nr_accesses = r->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 010806b7f92e..1ebf9af40499 100644
--- a/mm/damon.c
+++ b/mm/damon.c
@@ -20,6 +20,8 @@
 
 #define pr_fmt(fmt) "damon: " fmt
 
+#define CREATE_TRACE_POINTS
+
 #include <linux/damon.h>
 #include <linux/debugfs.h>
 #include <linux/delay.h>
@@ -31,6 +33,7 @@
 #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
@@ -762,6 +765,7 @@ 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, r, nr);
 			r->nr_accesses = 0;
 		}
 	}
-- 
2.17.1



  parent reply index

Thread overview: 24+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-06-08 11:40 [PATCH v15 00/14] Introduce Data Access MONitor (DAMON) SeongJae Park
2020-06-08 11:40 ` [PATCH v15 01/14] mm/page_ext: Export lookup_page_ext() to GPL modules SeongJae Park
2020-06-08 11:53   ` David Hildenbrand
2020-06-08 11:56     ` SeongJae Park
2020-06-08 15:49     ` Christoph Hellwig
2020-06-08 17:48       ` SeongJae Park
2020-06-08 18:15       ` David Hildenbrand
2020-06-10 20:13   ` vrd
2020-06-08 11:40 ` [PATCH v15 02/14] mm: Introduce Data Access MONitor (DAMON) SeongJae Park
2020-06-08 11:40 ` [PATCH v15 03/14] mm/damon: Implement region based sampling SeongJae Park
2020-06-10 20:36   ` vrd
2020-06-11  7:21     ` SeongJae Park
2020-06-08 11:40 ` [PATCH v15 04/14] mm/damon: Adaptively adjust regions SeongJae Park
2020-06-10 10:13   ` SeongJae Park
2020-06-08 11:40 ` [PATCH v15 05/14] mm/damon: Apply dynamic memory mapping changes SeongJae Park
2020-06-08 11:40 ` [PATCH v15 06/14] mm/damon: Implement callbacks SeongJae Park
2020-06-08 11:40 ` [PATCH v15 07/14] mm/damon: Implement access pattern recording SeongJae Park
2020-06-08 11:40 ` [PATCH v15 08/14] mm/damon: Add debugfs interface SeongJae Park
2020-06-08 11:40 ` SeongJae Park [this message]
2020-06-08 11:40 ` [PATCH v15 10/14] tools: Add a minimal user-space tool for DAMON SeongJae Park
2020-06-08 11:40 ` [PATCH v15 11/14] Documentation/admin-guide/mm: Add a document " SeongJae Park
2020-06-08 11:40 ` [PATCH v15 12/14] mm/damon: Add kunit tests SeongJae Park
2020-06-08 11:40 ` [PATCH v15 13/14] mm/damon: Add user space selftests SeongJae Park
2020-06-08 11:40 ` [PATCH v15 14/14] MAINTAINERS: Update for DAMON SeongJae Park

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