[LTP] [PATCH] enable fsx-linux.c running on VxWorks user space and add measurement of execution time

[Xin Wang]

Hello,
I come from Wind River. We and our customers used fsx-linux for file system testing on VxWorks user space and total execution time also received more attention in the testing.
So I upstream the change of VxWorks compatibility parts on this patch, wish to enlarge the test support of fsx-linux.
There is a point need to explain, because current VxWorks doesn't support CLOCK_MONOTONIC_RAW , CLOCK_MONOTONIC is still used by VxWorks when calling clock_gettime. 
When CLOCK_MONOTONIC_RAW is support by VxWorks in the future, this part will be removed.

Test log:
[fsx-linux]$ PATH=$PATH:$PWD ./fsx-linux -N 20000 /tmp/test/test.ini

truncating to largest ever: 0x13e76

truncating to largest ever: 0x2e52c

truncating to largest ever: 0x3c2c2

truncating to largest ever: 0x3f15f

truncating to largest ever: 0x3fcb9

truncating to largest ever: 0x3fe96

truncating to largest ever: 0x3ff9d

All operations completed A-OK!

Elapsed Test Time 1.366451681

Signed-off-by: Xin.Wang@windriver.com
---
 testcases/kernel/fs/fsx-linux/fsx-linux.c | 44 ++++++++++++++++++++---
 1 file changed, 40 insertions(+), 4 deletions(-)

diff --git a/testcases/kernel/fs/fsx-linux/fsx-linux.c b/testcases/kernel/fs/fsx-linux/fsx-linux.c
index 64c27a0f5..2064fac16 100644
--- a/testcases/kernel/fs/fsx-linux/fsx-linux.c
+++ b/testcases/kernel/fs/fsx-linux/fsx-linux.c
@@ -39,8 +39,10 @@
 
 #include <sys/types.h>
 #include <sys/stat.h>
-#if defined(_UWIN) || defined(__linux__)
+#if defined(_UWIN) || defined(__linux__) || defined(__VXWORKS__)
+#if !defined(__VXWORKS__)
 #include <sys/param.h>
+#endif
 #include <limits.h>
 #include <time.h>
 #include <string.h>
@@ -849,7 +851,12 @@ void domapwrite(unsigned offset, unsigned size)
 		gettimeofday(&t, NULL);
 		prt("       %lu.%06lu memcpy done\n", t.tv_sec, t.tv_usec);
 	}
-	if (msync(p, map_size, 0) != 0) {
+#ifdef MS_SYNC
+	if (msync(p, map_size, MS_SYNC) != 0)
+#else
+	if (msync(p, map_size, 0) != 0) 
+#endif
+	{
 		prterr("domapwrite: msync");
 		report_failure(203);
 	}
@@ -1115,11 +1122,16 @@ int main(int argc, char **argv)
 	int i, style, ch;
 	char *endp;
 	int dirpath = 0;
-
+	struct timespec time_start, time_end, time_diff;
+	
 	goodfile[0] = 0;
 	logfile[0] = 0;
 
+#if defined(__VXWORKS__)
+	page_size = (int)sysconf(_SC_PAGESIZE);
+#else
 	page_size = getpagesize();
+#endif
 	page_mask = page_size - 1;
 
 	setvbuf(stdout, NULL, _IOLBF, 0);	/* line buffered stdout */
@@ -1267,9 +1279,12 @@ int main(int argc, char **argv)
 	signal(SIGUSR1, cleanup);
 	signal(SIGUSR2, cleanup);
 
+#if defined(__VXWORKS__)
+	srand(seed);
+#else
 	initstate(seed, state, 256);
 	setstate(state);
-
+#endif
 	open_test_files(argv, argc);
 
 	strncat(goodfile, dirpath ? basename(fname) : fname, 256);
@@ -1336,12 +1351,33 @@ int main(int argc, char **argv)
 	} else
 		check_trunc_hack();
 
+#if defined(__VXWORKS__)
+	clock_gettime(CLOCK_MONOTONIC, &time_start);
+#else
+	clock_gettime(CLOCK_MONOTONIC_RAW, &time_start);
+#endif
+
 	while (numops == -1 || numops--)
 		test();
 
 	close_test_files();
+#if defined(__VXWORKS__)
+	clock_gettime(CLOCK_MONOTONIC, &time_end);
+#else
+	clock_gettime(CLOCK_MONOTONIC_RAW, &time_end);
+#endif
+
 	prt("All operations completed A-OK!\n");
 
+	if (time_end.tv_nsec < time_start.tv_nsec) {
+		time_end.tv_nsec += 1000000000;
+		time_end.tv_sec -= 1; 
+	}
+	time_diff.tv_sec = time_end.tv_sec - time_start.tv_sec;
+	time_diff.tv_nsec = time_end.tv_nsec - time_start.tv_nsec;
+	prt("Elapsed Test Time %lu.%09lu\n",
+        (unsigned long)time_diff.tv_sec, time_diff.tv_nsec);
+	
 	if (tf_buf)
 		free(tf_buf);
 
-- 
2.34.1