Let's measure the start time more precisely.
Signed-off-by: Jaegeuk Kim <[email protected]>
---
tools/f2fs_io/f2fs_io.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/tools/f2fs_io/f2fs_io.c b/tools/f2fs_io/f2fs_io.c
index 326b3bd033af..bc2e014d3911 100644
--- a/tools/f2fs_io/f2fs_io.c
+++ b/tools/f2fs_io/f2fs_io.c
@@ -1009,8 +1009,8 @@ static void do_read(int argc, char **argv, const struct
cmd_desc *cmd)
printf("fadvise SEQUENTIAL|WILLNEED to a file: %s\n", argv[7]);
}
- io_time_start = get_current_us();
if (do_mmap) {
+ io_time_start = get_current_us();
data = mmap(NULL, count * buf_size, PROT_READ,
MAP_SHARED | MAP_POPULATE, fd, offset);
if (data == MAP_FAILED)
@@ -1028,6 +1028,8 @@ static void do_read(int argc, char **argv, const struct
cmd_desc *cmd)
MAP_SHARED, fd, offset);
if (data == MAP_FAILED)
die("Mmap failed");
+
+ io_time_start = get_current_us();
if (posix_fadvise(fd, offset, count * buf_size,
POSIX_FADV_WILLNEED) != 0)
die_errno("fadvise failed");
@@ -1040,6 +1042,7 @@ static void do_read(int argc, char **argv, const struct
cmd_desc *cmd)
read_cnt = count * buf_size;
memcpy(print_buf, data, print_bytes);
} else {
+ io_time_start = get_current_us();
for (i = 0; i < count; i++) {
if (!do_dontcache) {
ret = pread(fd, buf, buf_size, offset +
buf_size * i);
--
2.52.0.107.ga0afd4fd5b-goog
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