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b7aba6984d
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>
74 lines
1.5 KiB
C
74 lines
1.5 KiB
C
#undef TRACE_SYSTEM
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#define TRACE_SYSTEM compaction
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#if !defined(_TRACE_COMPACTION_H) || defined(TRACE_HEADER_MULTI_READ)
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#define _TRACE_COMPACTION_H
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#include <linux/types.h>
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#include <linux/tracepoint.h>
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#include "gfpflags.h"
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DECLARE_EVENT_CLASS(mm_compaction_isolate_template,
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TP_PROTO(unsigned long nr_scanned,
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unsigned long nr_taken),
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TP_ARGS(nr_scanned, nr_taken),
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TP_STRUCT__entry(
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__field(unsigned long, nr_scanned)
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__field(unsigned long, nr_taken)
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),
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TP_fast_assign(
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__entry->nr_scanned = nr_scanned;
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__entry->nr_taken = nr_taken;
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),
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TP_printk("nr_scanned=%lu nr_taken=%lu",
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__entry->nr_scanned,
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__entry->nr_taken)
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);
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DEFINE_EVENT(mm_compaction_isolate_template, mm_compaction_isolate_migratepages,
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TP_PROTO(unsigned long nr_scanned,
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unsigned long nr_taken),
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TP_ARGS(nr_scanned, nr_taken)
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);
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DEFINE_EVENT(mm_compaction_isolate_template, mm_compaction_isolate_freepages,
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TP_PROTO(unsigned long nr_scanned,
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unsigned long nr_taken),
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TP_ARGS(nr_scanned, nr_taken)
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);
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TRACE_EVENT(mm_compaction_migratepages,
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TP_PROTO(unsigned long nr_migrated,
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unsigned long nr_failed),
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TP_ARGS(nr_migrated, nr_failed),
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TP_STRUCT__entry(
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__field(unsigned long, nr_migrated)
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__field(unsigned long, nr_failed)
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),
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TP_fast_assign(
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__entry->nr_migrated = nr_migrated;
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__entry->nr_failed = nr_failed;
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),
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TP_printk("nr_migrated=%lu nr_failed=%lu",
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__entry->nr_migrated,
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__entry->nr_failed)
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);
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#endif /* _TRACE_COMPACTION_H */
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/* This part must be outside protection */
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#include <trace/define_trace.h>
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