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mm, vmscan: add classzone information to tracepoints 

This is convenient when tracking down why the skip count is high because
it'll show what classzone kswapd woke up at and what zones are being
isolated.

Link: http://lkml.kernel.org/r/1467970510-21195-29-git-send-email-mgorman@techsingularity.net
Signed-off-by: Mel Gorman <mgorman@techsingularity.net>
Acked-by: Vlastimil Babka <vbabka@suse.cz>
Cc: Hillf Danton <hillf.zj@alibaba-inc.com>
Acked-by: Johannes Weiner <hannes@cmpxchg.org>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: Minchan Kim <minchan@kernel.org>
Cc: Rik van Riel <riel@surriel.com>
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 2016-07-28 15:46:47 -07:00 committed by Linus Torvalds
parent 84c7a7771f
commit e5146b12e2
2 changed files with 40 additions and 25 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

51
include/trace/events/vmscan.h
View File

@ -55,21 +55,23 @@ TRACE_EVENT(mm_vmscan_kswapd_sleep,
TRACE_EVENT(mm_vmscan_kswapd_wake,
TP_PROTO(int nid, int order),
TP_PROTO(int nid, int zid, int order),
TP_ARGS(nid, order),
TP_ARGS(nid, zid, order),
TP_STRUCT__entry(
__field( int, nid )
__field( int, zid )
__field( int, order )
),
TP_fast_assign(
__entry->nid = nid;
__entry->zid = zid;
__entry->order = order;
),
TP_printk("nid=%d order=%d", __entry->nid, __entry->order)
TP_printk("nid=%d zid=%d order=%d", __entry->nid, __entry->zid, __entry->order)
);
TRACE_EVENT(mm_vmscan_wakeup_kswapd,
@ -98,47 +100,50 @@ TRACE_EVENT(mm_vmscan_wakeup_kswapd,
DECLARE_EVENT_CLASS(mm_vmscan_direct_reclaim_begin_template,
TP_PROTO(int order, int may_writepage, gfp_t gfp_flags),
TP_PROTO(int order, int may_writepage, gfp_t gfp_flags, int classzone_idx),
TP_ARGS(order, may_writepage, gfp_flags),
TP_ARGS(order, may_writepage, gfp_flags, classzone_idx),
TP_STRUCT__entry(
__field( int, order )
__field( int, may_writepage )
__field( gfp_t, gfp_flags )
__field( int, classzone_idx )
),
TP_fast_assign(
__entry->order = order;
__entry->may_writepage = may_writepage;
__entry->gfp_flags = gfp_flags;
__entry->classzone_idx = classzone_idx;
),
TP_printk("order=%d may_writepage=%d gfp_flags=%s",
TP_printk("order=%d may_writepage=%d gfp_flags=%s classzone_idx=%d",
__entry->order,
__entry->may_writepage,
show_gfp_flags(__entry->gfp_flags))
show_gfp_flags(__entry->gfp_flags),
__entry->classzone_idx)
);
DEFINE_EVENT(mm_vmscan_direct_reclaim_begin_template, mm_vmscan_direct_reclaim_begin,
TP_PROTO(int order, int may_writepage, gfp_t gfp_flags),
TP_PROTO(int order, int may_writepage, gfp_t gfp_flags, int classzone_idx),
TP_ARGS(order, may_writepage, gfp_flags)
TP_ARGS(order, may_writepage, gfp_flags, classzone_idx)
);
DEFINE_EVENT(mm_vmscan_direct_reclaim_begin_template, mm_vmscan_memcg_reclaim_begin,
TP_PROTO(int order, int may_writepage, gfp_t gfp_flags),
TP_PROTO(int order, int may_writepage, gfp_t gfp_flags, int classzone_idx),
TP_ARGS(order, may_writepage, gfp_flags)
TP_ARGS(order, may_writepage, gfp_flags, classzone_idx)
);
DEFINE_EVENT(mm_vmscan_direct_reclaim_begin_template, mm_vmscan_memcg_softlimit_reclaim_begin,
TP_PROTO(int order, int may_writepage, gfp_t gfp_flags),
TP_PROTO(int order, int may_writepage, gfp_t gfp_flags, int classzone_idx),
TP_ARGS(order, may_writepage, gfp_flags)
TP_ARGS(order, may_writepage, gfp_flags, classzone_idx)
);
DECLARE_EVENT_CLASS(mm_vmscan_direct_reclaim_end_template,
@ -266,16 +271,18 @@ TRACE_EVENT(mm_shrink_slab_end,
DECLARE_EVENT_CLASS(mm_vmscan_lru_isolate_template,
TP_PROTO(int order,
TP_PROTO(int classzone_idx,
int order,
unsigned long nr_requested,
unsigned long nr_scanned,
unsigned long nr_taken,
isolate_mode_t isolate_mode,
int file),
TP_ARGS(order, nr_requested, nr_scanned, nr_taken, isolate_mode, file),
TP_ARGS(classzone_idx, order, nr_requested, nr_scanned, nr_taken, isolate_mode, file),
TP_STRUCT__entry(
__field(int, classzone_idx)
__field(int, order)
__field(unsigned long, nr_requested)
__field(unsigned long, nr_scanned)
@ -285,6 +292,7 @@ DECLARE_EVENT_CLASS(mm_vmscan_lru_isolate_template,
),
TP_fast_assign(
__entry->classzone_idx = classzone_idx;
__entry->order = order;
__entry->nr_requested = nr_requested;
__entry->nr_scanned = nr_scanned;
@ -293,8 +301,9 @@ DECLARE_EVENT_CLASS(mm_vmscan_lru_isolate_template,
__entry->file = file;
),
TP_printk("isolate_mode=%d order=%d nr_requested=%lu nr_scanned=%lu nr_taken=%lu file=%d",
TP_printk("isolate_mode=%d classzone=%d order=%d nr_requested=%lu nr_scanned=%lu nr_taken=%lu file=%d",
__entry->isolate_mode,
__entry->classzone_idx,
__entry->order,
__entry->nr_requested,
__entry->nr_scanned,
@ -304,27 +313,29 @@ DECLARE_EVENT_CLASS(mm_vmscan_lru_isolate_template,
DEFINE_EVENT(mm_vmscan_lru_isolate_template, mm_vmscan_lru_isolate,
TP_PROTO(int order,
TP_PROTO(int classzone_idx,
int order,
unsigned long nr_requested,
unsigned long nr_scanned,
unsigned long nr_taken,
isolate_mode_t isolate_mode,
int file),
TP_ARGS(order, nr_requested, nr_scanned, nr_taken, isolate_mode, file)
TP_ARGS(classzone_idx, order, nr_requested, nr_scanned, nr_taken, isolate_mode, file)
);
DEFINE_EVENT(mm_vmscan_lru_isolate_template, mm_vmscan_memcg_isolate,
TP_PROTO(int order,
TP_PROTO(int classzone_idx,
int order,
unsigned long nr_requested,
unsigned long nr_scanned,
unsigned long nr_taken,
isolate_mode_t isolate_mode,
int file),
TP_ARGS(order, nr_requested, nr_scanned, nr_taken, isolate_mode, file)
TP_ARGS(classzone_idx, order, nr_requested, nr_scanned, nr_taken, isolate_mode, file)
);

14
mm/vmscan.c
View File

@ -1439,7 +1439,7 @@ static unsigned long isolate_lru_pages(unsigned long nr_to_scan,
if (!list_empty(&pages_skipped))
list_splice(&pages_skipped, src);
*nr_scanned = scan;
trace_mm_vmscan_lru_isolate(sc->order, nr_to_scan, scan,
trace_mm_vmscan_lru_isolate(sc->reclaim_idx, sc->order, nr_to_scan, scan,
nr_taken, mode, is_file_lru(lru));
for (scan = 0; scan < MAX_NR_ZONES; scan++) {
nr_pages = nr_zone_taken[scan];
@ -2889,7 +2889,8 @@ unsigned long try_to_free_pages(struct zonelist *zonelist, int order,
trace_mm_vmscan_direct_reclaim_begin(order,
sc.may_writepage,
gfp_mask);
gfp_mask,
sc.reclaim_idx);
nr_reclaimed = do_try_to_free_pages(zonelist, &sc);
@ -2920,7 +2921,8 @@ unsigned long mem_cgroup_shrink_node(struct mem_cgroup *memcg,
trace_mm_vmscan_memcg_softlimit_reclaim_begin(sc.order,
sc.may_writepage,
sc.gfp_mask);
sc.gfp_mask,
sc.reclaim_idx);
/*
* NOTE: Although we can get the priority field, using it
@ -2968,7 +2970,8 @@ unsigned long try_to_free_mem_cgroup_pages(struct mem_cgroup *memcg,
trace_mm_vmscan_memcg_reclaim_begin(0,
sc.may_writepage,
sc.gfp_mask);
sc.gfp_mask,
sc.reclaim_idx);
nr_reclaimed = do_try_to_free_pages(zonelist, &sc);
@ -3386,7 +3389,8 @@ kswapd_try_sleep:
* but kcompactd is woken to compact for the original
* request (alloc_order).
*/
trace_mm_vmscan_kswapd_wake(pgdat->node_id, alloc_order);
trace_mm_vmscan_kswapd_wake(pgdat->node_id, classzone_idx,
alloc_order);
reclaim_order = balance_pgdat(pgdat, alloc_order, classzone_idx);
if (reclaim_order < alloc_order)
goto kswapd_try_sleep;