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authorMel Gorman <mel@csn.ul.ie>2011-01-13 15:45:54 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2011-01-13 17:32:33 -0800
commitb7aba6984dc048503b69c2a885098cdd430832bf (patch)
tree1f682189bd967feaf28c2978445c7ebe82116185 /include/trace
parent2d90508f638241a2e7422d884767398296ebe720 (diff)
downloadop-kernel-dev-b7aba6984dc048503b69c2a885098cdd430832bf.zip
op-kernel-dev-b7aba6984dc048503b69c2a885098cdd430832bf.tar.gz
mm: compaction: add trace events for memory compaction activity
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>
Diffstat (limited to 'include/trace')
-rw-r--r--include/trace/events/compaction.h74
1 files changed, 74 insertions, 0 deletions
diff --git a/include/trace/events/compaction.h b/include/trace/events/compaction.h
new file mode 100644
index 0000000..388bcdd
--- /dev/null
+++ b/include/trace/events/compaction.h
@@ -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>
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