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authorWu Fengguang <fengguang.wu@intel.com>2010-12-06 22:34:29 -0600
committerWu Fengguang <fengguang.wu@intel.com>2011-07-09 22:09:03 -0700
commite1cbe236013c82bcf9a156e98d7b47efb89d2674 (patch)
treec2f1764a3d07fd01fdbe6fd7d6ecd647557808d5 /include/trace
parentffd1f609ab10532e8137b4b981fdf903ef4d0b32 (diff)
downloadop-kernel-dev-e1cbe236013c82bcf9a156e98d7b47efb89d2674.zip
op-kernel-dev-e1cbe236013c82bcf9a156e98d7b47efb89d2674.tar.gz
writeback: trace global_dirty_state
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>
Diffstat (limited to 'include/trace')
-rw-r--r--include/trace/events/writeback.h46
1 files changed, 46 insertions, 0 deletions
diff --git a/include/trace/events/writeback.h b/include/trace/events/writeback.h
index 3e7662a..6bca4cc 100644
--- a/include/trace/events/writeback.h
+++ b/include/trace/events/writeback.h
@@ -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),
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