From: Wu Fengguang <fengguang.wu@intel.com>
To: <linux-fsdevel@vger.kernel.org>
Cc: Jan Kara <jack@suse.cz>, Dave Chinner <david@fromorbit.com>,
Christoph Hellwig <hch@infradead.org>,
Andrew Morton <akpm@linux-foundation.org>,
Wu Fengguang <fengguang.wu@intel.com>
Cc: LKML <linux-kernel@vger.kernel.org>
Subject: [PATCH 9/9] writeback: trace global_dirty_state
Date: Wed, 29 Jun 2011 22:52:54 +0800 [thread overview]
Message-ID: <20110629145554.698086654@intel.com> (raw)
In-Reply-To: 20110629145245.835998321@intel.com
[-- Attachment #1: writeback-trace-global-dirty-states.patch --]
[-- Type: text/plain, Size: 2465 bytes --]
Add trace event balance_dirty_state for showing the global dirty page
counts and thresholds at each global_dirty_limits() invocation. This
will cover the callers throttle_vm_writeout(), over_bground_thresh()
and each balance_dirty_pages() loop.
Signed-off-by: Wu Fengguang <fengguang.wu@intel.com>
---
include/trace/events/writeback.h | 46 +++++++++++++++++++++++++++++
mm/page-writeback.c | 1
2 files changed, 47 insertions(+)
--- linux-next.orig/mm/page-writeback.c 2011-06-29 22:29:34.000000000 +0800
+++ linux-next/mm/page-writeback.c 2011-06-29 22:29:34.000000000 +0800
@@ -442,6 +442,7 @@ void global_dirty_limits(unsigned long *
}
*pbackground = background;
*pdirty = dirty;
+ trace_global_dirty_state(background, dirty);
}
/**
--- linux-next.orig/include/trace/events/writeback.h 2011-06-29 22:29:34.000000000 +0800
+++ linux-next/include/trace/events/writeback.h 2011-06-29 22:33:30.000000000 +0800
@@ -204,6 +204,52 @@ TRACE_EVENT(writeback_queue_io,
__entry->moved)
);
+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 = global_dirty_limit;
+ ),
+
+ TP_printk("dirty=%lu writeback=%lu unstable=%lu "
+ "bg_thresh=%lu thresh=%lu limit=%lu "
+ "dirtied=%lu written=%lu",
+ __entry->nr_dirty,
+ __entry->nr_writeback,
+ __entry->nr_unstable,
+ __entry->background_thresh,
+ __entry->dirty_thresh,
+ __entry->dirty_limit,
+ __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:[~2011-06-29 14:52 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-06-29 14:52 [PATCH 0/9] write bandwidth estimation and writeback fixes v2 Wu Fengguang
2011-06-29 14:52 ` [PATCH 1/9] writeback: make writeback_control.nr_to_write straight Wu Fengguang
2011-06-30 16:24 ` Jan Kara
2011-07-01 12:03 ` Wu Fengguang
2011-06-29 14:52 ` [PATCH 2/9] writeback: account per-bdi accumulated written pages Wu Fengguang
2011-06-29 14:52 ` [PATCH 3/9] writeback: bdi write bandwidth estimation Wu Fengguang
2011-06-30 19:56 ` Jan Kara
2011-07-01 14:58 ` Wu Fengguang
2011-07-04 3:05 ` Wu Fengguang
2011-07-13 23:30 ` Jan Kara
2011-07-23 7:26 ` Wu Fengguang
2011-07-01 15:20 ` Andrea Righi
2011-07-08 11:53 ` Wu Fengguang
2011-07-01 18:32 ` Vivek Goyal
2011-07-23 8:02 ` Wu Fengguang
2011-07-01 19:19 ` Vivek Goyal
2011-07-01 19:29 ` Vivek Goyal
2011-07-23 8:07 ` Wu Fengguang
2011-06-29 14:52 ` [PATCH 4/9] writeback: show bdi write bandwidth in debugfs Wu Fengguang
2011-06-29 14:52 ` [PATCH 5/9] writeback: consolidate variable names in balance_dirty_pages() Wu Fengguang
2011-06-30 17:26 ` Jan Kara
2011-06-29 14:52 ` [PATCH 6/9] writeback: introduce smoothed global dirty limit Wu Fengguang
2011-07-01 15:20 ` Andrea Righi
2011-07-08 11:51 ` Wu Fengguang
2011-06-29 14:52 ` [PATCH 7/9] writeback: introduce max-pause and pass-good dirty limits Wu Fengguang
2011-06-29 14:52 ` [PATCH 8/9] writeback: scale IO chunk size up to half device bandwidth Wu Fengguang
2011-06-29 14:52 ` Wu Fengguang [this message]
2011-07-01 15:18 ` [PATCH 9/9] writeback: trace global_dirty_state Christoph Hellwig
2011-07-01 15:45 ` Wu Fengguang
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