Add gtod_reduce option

[fio.git] / options.c

diff --git a/options.c b/options.c
index d4fc18489683c5522edf5d825f0d8fb2ba400f42..f068ebd4fc8594ec4a1cbfbfa9c133d87dc2d62f 100644 (file)
--- a/options.c
+++ b/options.c
@@ -432,6 +432,20 @@ static int str_lockfile_cb(void *data, const char *str)
        return 0;
 }
 
+static int str_gtod_reduce_cb(void *data, int *il)
+{
+       struct thread_data *td = data;
+       int val = *il;
+
+       td->o.disable_clat = !!val;
+       td->o.disable_slat = !!val;
+       td->o.disable_bw = !!val;
+       if (val)
+               td->tv_cache_mask = 63;
+
+       return 0;
+}
+
 #define __stringify_1(x)       #x
 #define __stringify(x)         __stringify_1(x)
 
@@ -1290,11 +1304,19 @@ static struct fio_option options[] = {
                .def    = "1",
        },
 #endif
+       {
+               .name   = "gtod_reduce",
+               .type   = FIO_OPT_BOOL,
+               .help   = "Greatly reduce number of gettimeofday() calls",
+               .cb     = str_gtod_reduce_cb,
+               .def    = "0",
+       },
        {
                .name   = "disable_clat",
                .type   = FIO_OPT_BOOL,
                .off1   = td_var_offset(disable_clat),
                .help   = "Disable completion latency numbers",
+               .parent = "gtod_reduce",
                .def    = "0",
        },
        {
@@ -1302,6 +1324,7 @@ static struct fio_option options[] = {
                .type   = FIO_OPT_BOOL,
                .off1   = td_var_offset(disable_slat),
                .help   = "Disable submissionn latency numbers",
+               .parent = "gtod_reduce",
                .def    = "0",
        },
        {
@@ -1309,6 +1332,7 @@ static struct fio_option options[] = {
                .type   = FIO_OPT_BOOL,
                .off1   = td_var_offset(disable_bw),
                .help   = "Disable bandwidth logging",
+               .parent = "gtod_reduce",
                .def    = "0",
        },
        {