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| author | Wu Fengguang <fengguang.wu@intel.com> | 2011-03-03 00:22:49 +0100 |
|---|---|---|
| committer | Wu Fengguang <fengguang.wu@intel.com> | 2011-10-30 17:29:21 +0100 |
| commit | b48c104d2211b0ac881a71f5f76a3816225f8111 (patch) | |
| tree | b947f3fd4c8b49ee12d516f3eb520209c577387b /include/trace | |
| parent | writeback: fix ppc compile warnings on do_div(long long, unsigned long) (diff) | |
| download | linux-b48c104d2211b0ac881a71f5f76a3816225f8111.tar.xz linux-b48c104d2211b0ac881a71f5f76a3816225f8111.zip | |
writeback: trace event bdi_dirty_ratelimit
It helps understand how various throttle bandwidths are updated.
Signed-off-by: Wu Fengguang <fengguang.wu@intel.com>
Diffstat (limited to 'include/trace')
| -rw-r--r-- | include/trace/events/writeback.h | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/include/trace/events/writeback.h b/include/trace/events/writeback.h index 178c23508d3d..ffb5deb77ca9 100644 --- a/include/trace/events/writeback.h +++ b/include/trace/events/writeback.h @@ -226,6 +226,51 @@ TRACE_EVENT(global_dirty_state, ) ); +#define KBps(x) ((x) << (PAGE_SHIFT - 10)) + +TRACE_EVENT(bdi_dirty_ratelimit, + + TP_PROTO(struct backing_dev_info *bdi, + unsigned long dirty_rate, + unsigned long task_ratelimit), + + TP_ARGS(bdi, dirty_rate, task_ratelimit), + + TP_STRUCT__entry( + __array(char, bdi, 32) + __field(unsigned long, write_bw) + __field(unsigned long, avg_write_bw) + __field(unsigned long, dirty_rate) + __field(unsigned long, dirty_ratelimit) + __field(unsigned long, task_ratelimit) + __field(unsigned long, balanced_dirty_ratelimit) + ), + + TP_fast_assign( + strlcpy(__entry->bdi, dev_name(bdi->dev), 32); + __entry->write_bw = KBps(bdi->write_bandwidth); + __entry->avg_write_bw = KBps(bdi->avg_write_bandwidth); + __entry->dirty_rate = KBps(dirty_rate); + __entry->dirty_ratelimit = KBps(bdi->dirty_ratelimit); + __entry->task_ratelimit = KBps(task_ratelimit); + __entry->balanced_dirty_ratelimit = + KBps(bdi->balanced_dirty_ratelimit); + ), + + TP_printk("bdi %s: " + "write_bw=%lu awrite_bw=%lu dirty_rate=%lu " + "dirty_ratelimit=%lu task_ratelimit=%lu " + "balanced_dirty_ratelimit=%lu", + __entry->bdi, + __entry->write_bw, /* write bandwidth */ + __entry->avg_write_bw, /* avg write bandwidth */ + __entry->dirty_rate, /* bdi dirty rate */ + __entry->dirty_ratelimit, /* base ratelimit */ + __entry->task_ratelimit, /* ratelimit with position control */ + __entry->balanced_dirty_ratelimit /* the balanced ratelimit */ + ) +); + DECLARE_EVENT_CLASS(writeback_congest_waited_template, TP_PROTO(unsigned int usec_timeout, unsigned int usec_delayed), |