diff options
| author | Mark Brown <broonie@opensource.wolfsonmicro.com> | 2013-02-21 20:05:48 +0100 |
|---|---|---|
| committer | Mark Brown <broonie@opensource.wolfsonmicro.com> | 2013-03-04 03:28:29 +0100 |
| commit | fe7d4ccd1d7748bc9919c1bdee1e8286776f75ff (patch) | |
| tree | 0d55a8de27712c409441c9b20844163c295ad07b /drivers | |
| parent | Linux 3.9-rc1 (diff) | |
| download | linux-fe7d4ccd1d7748bc9919c1bdee1e8286776f75ff.tar.xz 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>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/base/regmap/regmap.c | 8 |
1 files changed, 8 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); |