From: Ganesh Mahendran <opensource.ganesh@gmail.com>
To: linux-kernel@vger.kernel.org, linux-mm@kvack.org
Cc: akpm@linux-foundation.org, minchan@kernel.org, ngupta@vflare.org,
sergey.senozhatsky.work@gmail.com, rostedt@goodmis.org,
mingo@redhat.com, Ganesh Mahendran <opensource.ganesh@gmail.com>
Subject: [PATCH 2/8] mm/zsmalloc: add per class compact trace event
Date: Fri, 1 Jul 2016 14:41:00 +0800 [thread overview]
Message-ID: <1467355266-9735-2-git-send-email-opensource.ganesh@gmail.com> (raw)
In-Reply-To: <1467355266-9735-1-git-send-email-opensource.ganesh@gmail.com>
add per class compact trace event. It will show how many zs pages
isolated, how many zs pages reclaimed.
----
<...>-627 [002] .... 192.641122: zs_compact_start: pool zram0
<...>-627 [002] .... 192.641166: zs_compact_class: class 254: 0 zspage isolated, 0 reclaimed
<...>-627 [002] .... 192.641169: zs_compact_class: class 202: 0 zspage isolated, 0 reclaimed
<...>-627 [002] .... 192.641172: zs_compact_class: class 190: 0 zspage isolated, 0 reclaimed
<...>-627 [002] .... 192.641180: zs_compact_class: class 168: 3 zspage isolated, 1 reclaimed
<...>-627 [002] .... 192.641190: zs_compact_class: class 151: 3 zspage isolated, 1 reclaimed
<...>-627 [002] .... 192.641201: zs_compact_class: class 144: 6 zspage isolated, 1 reclaimed
<...>-627 [002] .... 192.641224: zs_compact_class: class 126: 24 zspage isolated, 12 reclaimed
<...>-627 [002] .... 192.641261: zs_compact_class: class 111: 10 zspage isolated, 2 reclaimed
kswapd0-627 [002] .... 192.641333: zs_compact_class: class 107: 38 zspage isolated, 8 reclaimed
kswapd0-627 [002] .... 192.641415: zs_compact_class: class 100: 45 zspage isolated, 12 reclaimed
kswapd0-627 [002] .... 192.641481: zs_compact_class: class 94: 24 zspage isolated, 5 reclaimed
kswapd0-627 [002] .... 192.641568: zs_compact_class: class 91: 69 zspage isolated, 14 reclaimed
kswapd0-627 [002] .... 192.641688: zs_compact_class: class 83: 120 zspage isolated, 47 reclaimed
kswapd0-627 [002] .... 192.641765: zs_compact_class: class 76: 34 zspage isolated, 5 reclaimed
kswapd0-627 [002] .... 192.641832: zs_compact_class: class 74: 34 zspage isolated, 6 reclaimed
kswapd0-627 [002] .... 192.641958: zs_compact_class: class 71: 66 zspage isolated, 17 reclaimed
kswapd0-627 [002] .... 192.642000: zs_compact_class: class 67: 17 zspage isolated, 3 reclaimed
kswapd0-627 [002] .... 192.642063: zs_compact_class: class 66: 29 zspage isolated, 5 reclaimed
kswapd0-627 [002] .... 192.642113: zs_compact_class: class 62: 38 zspage isolated, 12 reclaimed
kswapd0-627 [002] .... 192.642143: zs_compact_class: class 58: 8 zspage isolated, 1 reclaimed
kswapd0-627 [002] .... 192.642176: zs_compact_class: class 57: 25 zspage isolated, 5 reclaimed
kswapd0-627 [002] .... 192.642184: zs_compact_class: class 54: 11 zspage isolated, 2 reclaimed
kswapd0-627 [002] .... 192.642191: zs_compact_class: class 52: 5 zspage isolated, 1 reclaimed
kswapd0-627 [002] .... 192.642201: zs_compact_class: class 51: 6 zspage isolated, 1 reclaimed
kswapd0-627 [002] .... 192.642211: zs_compact_class: class 49: 11 zspage isolated, 3 reclaimed
kswapd0-627 [002] .... 192.642216: zs_compact_class: class 46: 2 zspage isolated, 1 reclaimed
kswapd0-627 [002] .... 192.642218: zs_compact_class: class 44: 0 zspage isolated, 0 reclaimed
kswapd0-627 [002] .... 192.642221: zs_compact_class: class 43: 0 zspage isolated, 0 reclaimed
...
----
Signed-off-by: Ganesh Mahendran <opensource.ganesh@gmail.com>
---
include/trace/events/zsmalloc.h | 24 ++++++++++++++++++++++++
mm/zsmalloc.c | 16 +++++++++++++++-
2 files changed, 39 insertions(+), 1 deletion(-)
diff --git a/include/trace/events/zsmalloc.h b/include/trace/events/zsmalloc.h
index c7a39f4..e745246 100644
--- a/include/trace/events/zsmalloc.h
+++ b/include/trace/events/zsmalloc.h
@@ -46,6 +46,30 @@ TRACE_EVENT(zs_compact_end,
__entry->pages_compacted)
);
+TRACE_EVENT(zs_compact_class,
+
+ TP_PROTO(int class, unsigned long zspage_isolated, unsigned long zspage_reclaimed),
+
+ TP_ARGS(class, zspage_isolated, zspage_reclaimed),
+
+ TP_STRUCT__entry(
+ __field(int, class)
+ __field(unsigned long, zspage_isolated)
+ __field(unsigned long, zspage_reclaimed)
+ ),
+
+ TP_fast_assign(
+ __entry->class = class;
+ __entry->zspage_isolated = zspage_isolated;
+ __entry->zspage_reclaimed = zspage_reclaimed;
+ ),
+
+ TP_printk("class %3d: %ld zspage isolated, %ld zspage reclaimed",
+ __entry->class,
+ __entry->zspage_isolated,
+ __entry->zspage_reclaimed)
+);
+
#endif /* _TRACE_ZSMALLOC_H */
/* This part must be outside protection */
diff --git a/mm/zsmalloc.c b/mm/zsmalloc.c
index c7f79d5..405baa5 100644
--- a/mm/zsmalloc.c
+++ b/mm/zsmalloc.c
@@ -1780,6 +1780,11 @@ struct zs_compact_control {
/* Starting object index within @s_page which used for live object
* in the subpage. */
int index;
+
+ /* zspage isolated */
+ unsigned long nr_isolated;
+ /* zspage reclaimed */
+ unsigned long nr_reclaimed;
};
static int migrate_zspage(struct zs_pool *pool, struct size_class *class,
@@ -2272,7 +2277,10 @@ static unsigned long zs_can_compact(struct size_class *class)
static void __zs_compact(struct zs_pool *pool, struct size_class *class)
{
- struct zs_compact_control cc;
+ struct zs_compact_control cc = {
+ .nr_isolated = 0,
+ .nr_reclaimed = 0,
+ };
struct zspage *src_zspage;
struct zspage *dst_zspage = NULL;
@@ -2282,10 +2290,13 @@ static void __zs_compact(struct zs_pool *pool, struct size_class *class)
if (!zs_can_compact(class))
break;
+ cc.nr_isolated++;
+
cc.index = 0;
cc.s_page = get_first_page(src_zspage);
while ((dst_zspage = isolate_zspage(class, false))) {
+ cc.nr_isolated++;
cc.d_page = get_first_page(dst_zspage);
/*
* If there is no more space in dst_page, resched
@@ -2304,6 +2315,7 @@ static void __zs_compact(struct zs_pool *pool, struct size_class *class)
putback_zspage(class, dst_zspage);
if (putback_zspage(class, src_zspage) == ZS_EMPTY) {
free_zspage(pool, class, src_zspage);
+ cc.nr_reclaimed++;
pool->stats.pages_compacted += class->pages_per_zspage;
}
spin_unlock(&class->lock);
@@ -2315,6 +2327,8 @@ static void __zs_compact(struct zs_pool *pool, struct size_class *class)
putback_zspage(class, src_zspage);
spin_unlock(&class->lock);
+
+ trace_zs_compact_class(class->index, cc.nr_isolated, cc.nr_reclaimed);
}
unsigned long zs_compact(struct zs_pool *pool)
--
1.9.1
--
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next prev parent reply other threads:[~2016-07-01 6:41 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-07-01 6:40 [PATCH 1/8] mm/zsmalloc: modify zs compact trace interface Ganesh Mahendran
2016-07-01 6:41 ` Ganesh Mahendran [this message]
2016-07-03 23:49 ` [PATCH 2/8] mm/zsmalloc: add per class compact trace event Minchan Kim
2016-07-04 3:12 ` Ganesh Mahendran
2016-07-01 6:41 ` [PATCH 3/8] mm/zsmalloc: take obj index back from find_alloced_obj Ganesh Mahendran
2016-07-03 23:57 ` Minchan Kim
2016-07-04 3:23 ` Ganesh Mahendran
2016-07-01 6:41 ` [PATCH 4/8] mm/zsmalloc: use class->objs_per_zspage to get num of max objects Ganesh Mahendran
2016-07-03 23:58 ` Minchan Kim
2016-07-01 6:41 ` [PATCH 5/8] mm/zsmalloc: avoid calculate max objects of zspage twice Ganesh Mahendran
2016-07-04 0:03 ` Minchan Kim
2016-07-04 3:26 ` Ganesh Mahendran
2016-07-01 6:41 ` [PATCH 6/8] mm/zsmalloc: keep comments consistent with code Ganesh Mahendran
2016-07-04 0:05 ` Minchan Kim
2016-07-04 3:32 ` Ganesh Mahendran
2016-07-01 6:41 ` [PATCH 7/8] mm/zsmalloc: add __init,__exit attribute Ganesh Mahendran
2016-07-04 0:09 ` Minchan Kim
2016-07-01 6:41 ` [PATCH 8/8] mm/zsmalloc: use helper to clear page->flags bit Ganesh Mahendran
2016-07-04 0:11 ` Minchan Kim
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