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mm: compaction: add trace events for memory compaction activity

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In preparation for a patches promoting the use of memory compaction over
lumpy reclaim, this patch adds trace points for memory compaction
activity.  Using them, we can monitor the scanning activity of the
migration and free page scanners as well as the number and success rates
of pages passed to page migration.

Signed-off-by: Mel Gorman <mel@csn.ul.ie>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Cc: Rik van Riel <riel@redhat.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Andy Whitcroft <apw@shadowen.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Mel Gorman
2011-01-13 15:45:54 -08:00
committed by Linus Torvalds
parent 2d90508f63
commit b7aba6984d
2 changed files with 87 additions and 1 deletions
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include/trace/events/compaction.h
+74
View File
@@ -0,0 +1,74 @@
#undef TRACE_SYSTEM
#define TRACE_SYSTEM compaction
#if !defined(_TRACE_COMPACTION_H) || defined(TRACE_HEADER_MULTI_READ)
#define _TRACE_COMPACTION_H
#include <linux/types.h>
#include <linux/tracepoint.h>
#include "gfpflags.h"
DECLARE_EVENT_CLASS(mm_compaction_isolate_template,
TP_PROTO(unsigned long nr_scanned,
unsigned long nr_taken),
TP_ARGS(nr_scanned, nr_taken),
TP_STRUCT__entry(
__field(unsigned long, nr_scanned)
__field(unsigned long, nr_taken)
),
TP_fast_assign(
__entry->nr_scanned = nr_scanned;
__entry->nr_taken = nr_taken;
),
TP_printk("nr_scanned=%lu nr_taken=%lu",
__entry->nr_scanned,
__entry->nr_taken)
);
DEFINE_EVENT(mm_compaction_isolate_template, mm_compaction_isolate_migratepages,
TP_PROTO(unsigned long nr_scanned,
unsigned long nr_taken),
TP_ARGS(nr_scanned, nr_taken)
);
DEFINE_EVENT(mm_compaction_isolate_template, mm_compaction_isolate_freepages,
TP_PROTO(unsigned long nr_scanned,
unsigned long nr_taken),
TP_ARGS(nr_scanned, nr_taken)
);
TRACE_EVENT(mm_compaction_migratepages,
TP_PROTO(unsigned long nr_migrated,
unsigned long nr_failed),
TP_ARGS(nr_migrated, nr_failed),
TP_STRUCT__entry(
__field(unsigned long, nr_migrated)
__field(unsigned long, nr_failed)
),
TP_fast_assign(
__entry->nr_migrated = nr_migrated;
__entry->nr_failed = nr_failed;
),
TP_printk("nr_migrated=%lu nr_failed=%lu",
__entry->nr_migrated,
__entry->nr_failed)
);
#endif /* _TRACE_COMPACTION_H */
/* This part must be outside protection */
#include <trace/define_trace.h>