From e1cbe236013c82bcf9a156e98d7b47efb89d2674 Mon Sep 17 00:00:00 2001 From: Wu Fengguang Date: Mon, 6 Dec 2010 22:34:29 -0600 Subject: 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 --- include/trace/events/writeback.h | 46 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 46 insertions(+) (limited to 'include/trace') diff --git a/include/trace/events/writeback.h b/include/trace/events/writeback.h index 3e7662a0cfa3..6bca4cc0063c 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), -- cgit v1.2.3