linux-kernel - [PATCH] selftests: intel_pstate: ftime() is deprecated

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Date:   Fri, 16 Oct 2020 16:22:44 +0300
From:   Tommi Rantala <tommi.t.rantala@...ia.com>
To:     linux-kselftest@...r.kernel.org, linux-kernel@...r.kernel.org,
        Shuah Khan <shuah@...nel.org>
Cc:     Tommi Rantala <tommi.t.rantala@...ia.com>
Subject: [PATCH] selftests: intel_pstate: ftime() is deprecated

Use clock_gettime() instead of deprecated ftime().

  aperf.c: In function ‘main’:
  aperf.c:58:2: warning: ‘ftime’ is deprecated [-Wdeprecated-declarations]
     58 |  ftime(&before);
        |  ^~~~~
  In file included from aperf.c:9:
  /usr/include/sys/timeb.h:39:12: note: declared here
     39 | extern int ftime (struct timeb *__timebuf)
        |            ^~~~~

Signed-off-by: Tommi Rantala <tommi.t.rantala@...ia.com>
---
 tools/testing/selftests/intel_pstate/aperf.c | 17 ++++++++++++-----
 1 file changed, 12 insertions(+), 5 deletions(-)

diff --git a/tools/testing/selftests/intel_pstate/aperf.c b/tools/testing/selftests/intel_pstate/aperf.c
index f6cd03a87493..eea9dbab459b 100644
--- a/tools/testing/selftests/intel_pstate/aperf.c
+++ b/tools/testing/selftests/intel_pstate/aperf.c
@@ -10,6 +10,7 @@
 #include <sched.h>
 #include <errno.h>
 #include <string.h>
+#include <time.h>
 #include "../kselftest.h"
 
 void usage(char *name) {
@@ -22,7 +23,7 @@ int main(int argc, char **argv) {
 	long long tsc, old_tsc, new_tsc;
 	long long aperf, old_aperf, new_aperf;
 	long long mperf, old_mperf, new_mperf;
-	struct timeb before, after;
+	struct timespec before, after;
 	long long int start, finish, total;
 	cpu_set_t cpuset;
 
@@ -55,7 +56,10 @@ int main(int argc, char **argv) {
 		return 1;
 	}
 
-	ftime(&before);
+	if (clock_gettime(CLOCK_MONOTONIC, &before) < 0) {
+		perror("clock_gettime");
+		return 1;
+	}
 	pread(fd, &old_tsc,  sizeof(old_tsc), 0x10);
 	pread(fd, &old_aperf,  sizeof(old_mperf), 0xe7);
 	pread(fd, &old_mperf,  sizeof(old_aperf), 0xe8);
@@ -64,7 +68,10 @@ int main(int argc, char **argv) {
 		sqrt(i);
 	}
 
-	ftime(&after);
+	if (clock_gettime(CLOCK_MONOTONIC, &after) < 0) {
+		perror("clock_gettime");
+		return 1;
+	}
 	pread(fd, &new_tsc,  sizeof(new_tsc), 0x10);
 	pread(fd, &new_aperf,  sizeof(new_mperf), 0xe7);
 	pread(fd, &new_mperf,  sizeof(new_aperf), 0xe8);
@@ -73,8 +80,8 @@ int main(int argc, char **argv) {
 	aperf = new_aperf-old_aperf;
 	mperf = new_mperf-old_mperf;
 
-	start = before.time*1000 + before.millitm;
-	finish = after.time*1000 + after.millitm;
+	start = before.tv_sec*1000 + before.tv_nsec/1000000L;
+	finish = after.tv_sec*1000 + after.tv_nsec/1000000L;
 	total = finish - start;
 
 	printf("runTime: %4.2f\n", 1.0*total/1000);
-- 
2.26.2