[PATCH] Add thinktime_spin parameter

If you specify thinktime currently, fio will sleep for the duration.
Apps will typically do some data processing before sleeping, so add
a thinktime_spin parameter to control how much CPU to burn before
sleeping.

Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
diff --git a/fio.h b/fio.h
index 67cc065..934d897 100644
--- a/fio.h
+++ b/fio.h
@@ -274,6 +274,7 @@
 	unsigned int hugepage_size;
 	unsigned int rw_min_bs;
 	unsigned int thinktime;
+	unsigned int thinktime_spin;
 	unsigned int thinktime_blocks;
 	unsigned int fsync_blocks;
 	unsigned int start_delay;