Add support for idletime profiling
Idletime profiling allows a benchmark to run while filling the
idle cycles on the server, hence giving you some metric of how
much pressure the system is under. This is useful to be able
to profile and compare changes in a setup or driver, for instance.
Signed-off-by: Jens Axboe <axboe@kernel.dk>
diff --git a/os/os-windows.h b/os/os-windows.h
index ef71dd7..2d57891 100644
--- a/os/os-windows.h
+++ b/os/os-windows.h
@@ -21,6 +21,7 @@
#define FIO_HAVE_CPU_AFFINITY
#define FIO_HAVE_CHARDEV_SIZE
#define FIO_HAVE_GETTID
+#define FIO_HAVE_SCHED_IDLE
#define FIO_USE_GENERIC_RAND
#define FIO_PREFERRED_ENGINE "windowsaio"
@@ -247,4 +248,11 @@
}
+static inline int fio_set_sched_idle(void)
+{
+ /* SetThreadPriority returns nonzero for success */
+ return (SetThreadPriority(GetCurrentThread(), THREAD_PRIORITY_IDLE))? 0 : -1;
+}
+
+
#endif /* FIO_OS_WINDOWS_H */