From: Wu Fengguang <fengguang.wu@intel.com>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: Jan Kara <jack@suse.cz>, Wu Fengguang <fengguang.wu@intel.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Trond Myklebust <Trond.Myklebust@netapp.com>
Cc: Dave Chinner <david@fromorbit.com>
Cc: Theodore Ts'o <tytso@mit.edu>
Cc: Chris Mason <chris.mason@oracle.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Mel Gorman <mel@csn.ul.ie>
Cc: Rik van Riel <riel@redhat.com>
Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Cc: Greg Thelen <gthelen@google.com>
Cc: Minchan Kim <minchan.kim@gmail.com>
Cc: Vivek Goyal <vgoyal@redhat.com>
Cc: Andrea Righi <arighi@develer.com>
Cc: Balbir Singh <balbir@linux.vnet.ibm.com>
Cc: linux-mm <linux-mm@kvack.org>
Cc: <linux-fsdevel@vger.kernel.org>
Cc: LKML <linux-kernel@vger.kernel.org>
Subject: [PATCH 12/12] writeback: trace global_dirty_state
Date: Sat, 16 Apr 2011 21:25:58 +0800 [thread overview]
Message-ID: <20110416134333.960669369@intel.com> (raw)
In-Reply-To: 20110416132546.765212221@intel.com
[-- Attachment #1: writeback-trace-global-dirty-states.patch --]
[-- Type: text/plain, Size: 2475 bytes --]
Add trace balance_dirty_state for showing the global dirty page counts
and thresholds at each balance_dirty_pages() loop.
Signed-off-by: Wu Fengguang <fengguang.wu@intel.com>
---
include/trace/events/writeback.h | 48 +++++++++++++++++++++++++++++
mm/page-writeback.c | 1
2 files changed, 49 insertions(+)
--- linux-next.orig/mm/page-writeback.c 2011-04-16 11:28:28.000000000 +0800
+++ linux-next/mm/page-writeback.c 2011-04-16 11:28:30.000000000 +0800
@@ -387,6 +387,7 @@ void global_dirty_limits(unsigned long *
tsk = current;
*pbackground = background;
*pdirty = dirty;
+ trace_global_dirty_state(background, dirty);
}
/**
--- linux-next.orig/include/trace/events/writeback.h 2011-04-16 11:28:28.000000000 +0800
+++ linux-next/include/trace/events/writeback.h 2011-04-16 11:28:30.000000000 +0800
@@ -277,6 +277,54 @@ TRACE_EVENT(balance_dirty_pages,
)
);
+TRACE_EVENT(global_dirty_state,
+
+ TP_PROTO(unsigned long background_thresh,
+ unsigned long dirty_thresh
+ ),
+
+ TP_ARGS(background_thresh,
+ dirty_thresh
+ ),
+
+ TP_STRUCT__entry(
+ __field(unsigned long, nr_dirty)
+ __field(unsigned long, nr_writeback)
+ __field(unsigned long, nr_unstable)
+ __field(unsigned long, background_thresh)
+ __field(unsigned long, dirty_thresh)
+ __field(unsigned long, dirty_limit)
+ __field(unsigned long, nr_dirtied)
+ __field(unsigned long, nr_written)
+ ),
+
+ TP_fast_assign(
+ __entry->nr_dirty = global_page_state(NR_FILE_DIRTY);
+ __entry->nr_writeback = global_page_state(NR_WRITEBACK);
+ __entry->nr_unstable = global_page_state(NR_UNSTABLE_NFS);
+ __entry->nr_dirtied = global_page_state(NR_DIRTIED);
+ __entry->nr_written = global_page_state(NR_WRITTEN);
+ __entry->background_thresh = background_thresh;
+ __entry->dirty_thresh = dirty_thresh;
+ __entry->dirty_limit = default_backing_dev_info.dirty_threshold;
+ ),
+
+ TP_printk("dirty=%lu writeback=%lu unstable=%lu "
+ "bg_thresh=%lu thresh=%lu limit=%lu gap=%ld "
+ "dirtied=%lu written=%lu",
+ __entry->nr_dirty,
+ __entry->nr_writeback,
+ __entry->nr_unstable,
+ __entry->background_thresh,
+ __entry->dirty_thresh,
+ __entry->dirty_limit,
+ __entry->dirty_thresh - __entry->nr_dirty -
+ __entry->nr_writeback - __entry->nr_unstable,
+ __entry->nr_dirtied,
+ __entry->nr_written
+ )
+);
+
DECLARE_EVENT_CLASS(writeback_congest_waited_template,
TP_PROTO(unsigned int usec_timeout, unsigned int usec_delayed),
next prev parent reply other threads:[~2011-04-16 14:03 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-04-16 13:25 [PATCH 00/12] IO-less dirty throttling v7 Wu Fengguang
2011-04-16 13:25 ` [PATCH 01/12] writeback: account per-bdi accumulated written pages Wu Fengguang
2011-04-16 13:25 ` [PATCH 02/12] writeback: account per-bdi accumulated dirtied pages Wu Fengguang
2011-04-16 13:25 ` [PATCH 03/12] writeback: bdi write bandwidth estimation Wu Fengguang
2011-04-16 13:25 ` [PATCH 04/12] writeback: smoothed global/bdi dirty pages Wu Fengguang
2011-04-16 13:25 ` [PATCH 05/12] writeback: smoothed dirty threshold and limit Wu Fengguang
2011-04-16 13:25 ` [PATCH 06/12] writeback: enforce 1/4 gap between the dirty/background thresholds Wu Fengguang
2011-04-16 13:25 ` [PATCH 07/12] writeback: base throttle bandwidth and position ratio Wu Fengguang
2011-04-16 13:25 ` [PATCH 08/12] writeback: IO-less balance_dirty_pages() Wu Fengguang
2011-04-16 13:25 ` [PATCH 09/12] writeback: show bdi write bandwidth in debugfs Wu Fengguang
2011-04-16 13:25 ` [PATCH 10/12] writeback: trace dirty_ratelimit Wu Fengguang
2011-04-16 13:25 ` [PATCH 11/12] writeback: trace balance_dirty_pages Wu Fengguang
2011-04-16 13:25 ` Wu Fengguang [this message]
2011-04-16 16:27 ` [PATCH 00/12] IO-less dirty throttling v7 Sedat Dilek
2011-04-17 1:44 ` Wu Fengguang
2011-04-17 3:18 ` Sedat Dilek
2011-04-17 4:10 ` Wu Fengguang
2011-04-17 4:46 ` Sedat Dilek
2011-04-17 6:46 ` Sedat Dilek
2011-04-18 0:13 ` Wu Fengguang
2011-04-18 6:57 ` Sedat Dilek
2011-04-18 8:18 ` Wu Fengguang
2011-04-18 10:22 ` Sedat Dilek
2011-04-17 7:31 ` Marco Stornelli
2011-04-17 9:30 ` Wu Fengguang
2011-04-17 17:44 ` Marco Stornelli
2011-04-17 23:31 ` Wu Fengguang
2011-04-26 17:19 ` Vivek Goyal
2011-04-28 14:27 ` Wu Fengguang
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