603320239f
Add 2 new trace points to the periodic write-back wake up case, just like we do in the 'bdi_queue_work()' function. Namely, introduce: 1. trace_writeback_wake_thread(bdi) 2. trace_writeback_wake_forker_thread(bdi) The first event is triggered every time we wake up a bdi thread to start periodic background write-out. The second event is triggered only when the bdi thread does not exist and should be created by the forker thread. This patch was suggested by Dave Chinner and Christoph Hellwig. Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com> Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
160 lines
4.6 KiB
C
160 lines
4.6 KiB
C
#undef TRACE_SYSTEM
|
|
#define TRACE_SYSTEM writeback
|
|
|
|
#if !defined(_TRACE_WRITEBACK_H) || defined(TRACE_HEADER_MULTI_READ)
|
|
#define _TRACE_WRITEBACK_H
|
|
|
|
#include <linux/backing-dev.h>
|
|
#include <linux/device.h>
|
|
#include <linux/writeback.h>
|
|
|
|
struct wb_writeback_work;
|
|
|
|
DECLARE_EVENT_CLASS(writeback_work_class,
|
|
TP_PROTO(struct backing_dev_info *bdi, struct wb_writeback_work *work),
|
|
TP_ARGS(bdi, work),
|
|
TP_STRUCT__entry(
|
|
__array(char, name, 32)
|
|
__field(long, nr_pages)
|
|
__field(dev_t, sb_dev)
|
|
__field(int, sync_mode)
|
|
__field(int, for_kupdate)
|
|
__field(int, range_cyclic)
|
|
__field(int, for_background)
|
|
),
|
|
TP_fast_assign(
|
|
strncpy(__entry->name, dev_name(bdi->dev), 32);
|
|
__entry->nr_pages = work->nr_pages;
|
|
__entry->sb_dev = work->sb ? work->sb->s_dev : 0;
|
|
__entry->sync_mode = work->sync_mode;
|
|
__entry->for_kupdate = work->for_kupdate;
|
|
__entry->range_cyclic = work->range_cyclic;
|
|
__entry->for_background = work->for_background;
|
|
),
|
|
TP_printk("bdi %s: sb_dev %d:%d nr_pages=%ld sync_mode=%d "
|
|
"kupdate=%d range_cyclic=%d background=%d",
|
|
__entry->name,
|
|
MAJOR(__entry->sb_dev), MINOR(__entry->sb_dev),
|
|
__entry->nr_pages,
|
|
__entry->sync_mode,
|
|
__entry->for_kupdate,
|
|
__entry->range_cyclic,
|
|
__entry->for_background
|
|
)
|
|
);
|
|
#define DEFINE_WRITEBACK_WORK_EVENT(name) \
|
|
DEFINE_EVENT(writeback_work_class, name, \
|
|
TP_PROTO(struct backing_dev_info *bdi, struct wb_writeback_work *work), \
|
|
TP_ARGS(bdi, work))
|
|
DEFINE_WRITEBACK_WORK_EVENT(writeback_nothread);
|
|
DEFINE_WRITEBACK_WORK_EVENT(writeback_queue);
|
|
DEFINE_WRITEBACK_WORK_EVENT(writeback_exec);
|
|
|
|
TRACE_EVENT(writeback_pages_written,
|
|
TP_PROTO(long pages_written),
|
|
TP_ARGS(pages_written),
|
|
TP_STRUCT__entry(
|
|
__field(long, pages)
|
|
),
|
|
TP_fast_assign(
|
|
__entry->pages = pages_written;
|
|
),
|
|
TP_printk("%ld", __entry->pages)
|
|
);
|
|
|
|
DECLARE_EVENT_CLASS(writeback_class,
|
|
TP_PROTO(struct backing_dev_info *bdi),
|
|
TP_ARGS(bdi),
|
|
TP_STRUCT__entry(
|
|
__array(char, name, 32)
|
|
),
|
|
TP_fast_assign(
|
|
strncpy(__entry->name, dev_name(bdi->dev), 32);
|
|
),
|
|
TP_printk("bdi %s",
|
|
__entry->name
|
|
)
|
|
);
|
|
#define DEFINE_WRITEBACK_EVENT(name) \
|
|
DEFINE_EVENT(writeback_class, name, \
|
|
TP_PROTO(struct backing_dev_info *bdi), \
|
|
TP_ARGS(bdi))
|
|
|
|
DEFINE_WRITEBACK_EVENT(writeback_nowork);
|
|
DEFINE_WRITEBACK_EVENT(writeback_wake_thread);
|
|
DEFINE_WRITEBACK_EVENT(writeback_wake_forker_thread);
|
|
DEFINE_WRITEBACK_EVENT(writeback_bdi_register);
|
|
DEFINE_WRITEBACK_EVENT(writeback_bdi_unregister);
|
|
DEFINE_WRITEBACK_EVENT(writeback_thread_start);
|
|
DEFINE_WRITEBACK_EVENT(writeback_thread_stop);
|
|
|
|
DECLARE_EVENT_CLASS(wbc_class,
|
|
TP_PROTO(struct writeback_control *wbc, struct backing_dev_info *bdi),
|
|
TP_ARGS(wbc, bdi),
|
|
TP_STRUCT__entry(
|
|
__array(char, name, 32)
|
|
__field(long, nr_to_write)
|
|
__field(long, pages_skipped)
|
|
__field(int, sync_mode)
|
|
__field(int, nonblocking)
|
|
__field(int, encountered_congestion)
|
|
__field(int, for_kupdate)
|
|
__field(int, for_background)
|
|
__field(int, for_reclaim)
|
|
__field(int, range_cyclic)
|
|
__field(int, more_io)
|
|
__field(unsigned long, older_than_this)
|
|
__field(long, range_start)
|
|
__field(long, range_end)
|
|
),
|
|
|
|
TP_fast_assign(
|
|
strncpy(__entry->name, dev_name(bdi->dev), 32);
|
|
__entry->nr_to_write = wbc->nr_to_write;
|
|
__entry->pages_skipped = wbc->pages_skipped;
|
|
__entry->sync_mode = wbc->sync_mode;
|
|
__entry->for_kupdate = wbc->for_kupdate;
|
|
__entry->for_background = wbc->for_background;
|
|
__entry->for_reclaim = wbc->for_reclaim;
|
|
__entry->range_cyclic = wbc->range_cyclic;
|
|
__entry->more_io = wbc->more_io;
|
|
__entry->older_than_this = wbc->older_than_this ?
|
|
*wbc->older_than_this : 0;
|
|
__entry->range_start = (long)wbc->range_start;
|
|
__entry->range_end = (long)wbc->range_end;
|
|
),
|
|
|
|
TP_printk("bdi %s: towrt=%ld skip=%ld mode=%d kupd=%d "
|
|
"bgrd=%d reclm=%d cyclic=%d more=%d older=0x%lx "
|
|
"start=0x%lx end=0x%lx",
|
|
__entry->name,
|
|
__entry->nr_to_write,
|
|
__entry->pages_skipped,
|
|
__entry->sync_mode,
|
|
__entry->for_kupdate,
|
|
__entry->for_background,
|
|
__entry->for_reclaim,
|
|
__entry->range_cyclic,
|
|
__entry->more_io,
|
|
__entry->older_than_this,
|
|
__entry->range_start,
|
|
__entry->range_end)
|
|
)
|
|
|
|
#define DEFINE_WBC_EVENT(name) \
|
|
DEFINE_EVENT(wbc_class, name, \
|
|
TP_PROTO(struct writeback_control *wbc, struct backing_dev_info *bdi), \
|
|
TP_ARGS(wbc, bdi))
|
|
DEFINE_WBC_EVENT(wbc_writeback_start);
|
|
DEFINE_WBC_EVENT(wbc_writeback_written);
|
|
DEFINE_WBC_EVENT(wbc_writeback_wait);
|
|
DEFINE_WBC_EVENT(wbc_balance_dirty_start);
|
|
DEFINE_WBC_EVENT(wbc_balance_dirty_written);
|
|
DEFINE_WBC_EVENT(wbc_balance_dirty_wait);
|
|
DEFINE_WBC_EVENT(wbc_writepage);
|
|
|
|
#endif /* _TRACE_WRITEBACK_H */
|
|
|
|
/* This part must be outside protection */
|
|
#include <trace/define_trace.h>
|