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| author | Mark Brown <broonie@opensource.wolfsonmicro.com> | 2013-02-21 19:05:48 +0000 |
|---|---|---|
| committer | Mark Brown <broonie@opensource.wolfsonmicro.com> | 2013-03-04 10:28:29 +0800 |
| commit | fe7d4ccd1d7748bc9919c1bdee1e8286776f75ff (patch) | |
| tree | 0d55a8de27712c409441c9b20844163c295ad07b | |
| parent | 6dbe51c251a327e012439c4772097a13df43c5b8 (diff) | |
| download | linux-fe7d4ccd1d7748bc9919c1bdee1e8286776f75ff.tar.gz linux-fe7d4ccd1d7748bc9919c1bdee1e8286776f75ff.tar.bz2 linux-fe7d4ccd1d7748bc9919c1bdee1e8286776f75ff.zip | |
regmap: async: Add tracepoints for async I/O
Trace when we start and complete async writes, and when we start and
finish blocking for their completion. This is useful for performance
analysis of the resulting I/O patterns.
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
| -rw-r--r-- | drivers/base/regmap/regmap.c | 8 | ||||
| -rw-r--r-- | include/trace/events/regmap.h | 48 |
2 files changed, 56 insertions, 0 deletions
diff --git a/drivers/base/regmap/regmap.c b/drivers/base/regmap/regmap.c index 3d2367501fd0..7c6d3be137ba 100644 --- a/drivers/base/regmap/regmap.c +++ b/drivers/base/regmap/regmap.c @@ -999,6 +999,8 @@ static int _regmap_raw_write(struct regmap *map, unsigned int reg, if (!async) return -ENOMEM; + trace_regmap_async_write_start(map->dev, reg, val_len); + async->work_buf = kzalloc(map->format.buf_size, GFP_KERNEL | GFP_DMA); if (!async->work_buf) { @@ -1640,6 +1642,8 @@ void regmap_async_complete_cb(struct regmap_async *async, int ret) struct regmap *map = async->map; bool wake; + trace_regmap_async_io_complete(map->dev); + spin_lock(&map->async_lock); list_del(&async->list); @@ -1686,6 +1690,8 @@ int regmap_async_complete(struct regmap *map) if (!map->bus->async_write) return 0; + trace_regmap_async_complete_start(map->dev); + wait_event(map->async_waitq, regmap_async_is_done(map)); spin_lock_irqsave(&map->async_lock, flags); @@ -1693,6 +1699,8 @@ int regmap_async_complete(struct regmap *map) map->async_ret = 0; spin_unlock_irqrestore(&map->async_lock, flags); + trace_regmap_async_complete_done(map->dev); + return ret; } EXPORT_SYMBOL_GPL(regmap_async_complete); diff --git a/include/trace/events/regmap.h b/include/trace/events/regmap.h index 41a7dbd570e2..a43a2f67bd8e 100644 --- a/include/trace/events/regmap.h +++ b/include/trace/events/regmap.h @@ -175,6 +175,54 @@ DEFINE_EVENT(regmap_bool, regmap_cache_bypass, ); +DECLARE_EVENT_CLASS(regmap_async, + + TP_PROTO(struct device *dev), + + TP_ARGS(dev), + + TP_STRUCT__entry( + __string( name, dev_name(dev) ) + ), + + TP_fast_assign( + __assign_str(name, dev_name(dev)); + ), + + TP_printk("%s", __get_str(name)) +); + +DEFINE_EVENT(regmap_block, regmap_async_write_start, + + TP_PROTO(struct device *dev, unsigned int reg, int count), + + TP_ARGS(dev, reg, count) +); + +DEFINE_EVENT(regmap_async, regmap_async_io_complete, + + TP_PROTO(struct device *dev), + + TP_ARGS(dev) + +); + +DEFINE_EVENT(regmap_async, regmap_async_complete_start, + + TP_PROTO(struct device *dev), + + TP_ARGS(dev) + +); + +DEFINE_EVENT(regmap_async, regmap_async_complete_done, + + TP_PROTO(struct device *dev), + + TP_ARGS(dev) + +); + #endif /* _TRACE_REGMAP_H */ /* This part must be outside protection */ |