Add options to have fio latency profile a device
This adds three new options:
- latency_target. This defines a specific latency target, in usec.
- latency_window. This defines the period over which fio samples.
- latency_percentile. This defines the percentage of IOs that must
meet the criteria specified by latency_target/latency_window.
With these options set, fio will run the described workload and
vary the queue depth between 1 and iodepth= to find the best
performing spot that meets the criteria specified by the three
options.
A sample job file is also added to demonstrate how to use this.
Signed-off-by: Jens Axboe <axboe@kernel.dk>
diff --git a/debug.h b/debug.h
index 6a74131..e248695 100644
--- a/debug.h
+++ b/debug.h
@@ -19,6 +19,7 @@
FD_PROFILE,
FD_TIME,
FD_NET,
+ FD_RATE,
FD_DEBUG_MAX,
};