diff options
| -rw-r--r-- | include/trace/events/writeback.h | 45 | ||||
| -rw-r--r-- | mm/page-writeback.c | 2 |
2 files changed, 47 insertions, 0 deletions
diff --git a/include/trace/events/writeback.h b/include/trace/events/writeback.h index 178c235..ffb5deb 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), diff --git a/mm/page-writeback.c b/mm/page-writeback.c index 0802d51..e3c2d8b 100644 --- a/mm/page-writeback.c +++ b/mm/page-writeback.c @@ -875,6 +875,8 @@ static void bdi_update_dirty_ratelimit(struct backing_dev_info *bdi, bdi->dirty_ratelimit = max(dirty_ratelimit, 1UL); bdi->balanced_dirty_ratelimit = balanced_dirty_ratelimit; + + trace_bdi_dirty_ratelimit(bdi, dirty_rate, task_ratelimit); } void __bdi_update_bandwidth(struct backing_dev_info *bdi, |
