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authorLinus Torvalds <torvalds@linux-foundation.org>2017-09-04 23:06:34 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2017-09-04 23:06:34 +0300
commitdd90cccffc20a15d8e4c3ac8813f4b6a6cd4766f (patch)
treeb870506b456e3b965638035abb0b2c944b024fd9 /tools/testing/selftests/timers
parentb1b6f83ac938d176742c85757960dec2cf10e468 (diff)
parent51218298a25e6942957c5595f2abf130d47d5df9 (diff)
downloadlinux-dd90cccffc20a15d8e4c3ac8813f4b6a6cd4766f.tar.xz
Merge branch 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull timer fixes from Thomas Gleixner: "A rather small update for the time(r) subsystem: - A new clocksource driver IMX-TPM - Minor fixes to the alarmtimer facility - Device tree cleanups for Renesas drivers - A new kselftest and fixes for the timer related tests - Conversion of the clocksource drivers to use %pOF - Use the proper helpers to access rlimits in the posix-cpu-timer code" * 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: alarmtimer: Ensure RTC module is not unloaded clocksource: Convert to using %pOF instead of full_name clocksource/drivers/bcm2835: Remove message for a memory allocation failure devicetree: bindings: Remove deprecated properties devicetree: bindings: Remove unused 32-bit CMT bindings devicetree: bindings: Deprecate property, update example devicetree: bindings: r8a73a4 and R-Car Gen2 CMT bindings devicetree: bindings: R-Car Gen2 CMT0 and CMT1 bindings devicetree: bindings: Remove sh7372 CMT binding clocksource/drivers/imx-tpm: Add imx tpm timer support dt-bindings: timer: Add nxp tpm timer binding doc posix-cpu-timers: Use dedicated helper to access rlimit values alarmtimer: Fix unavailable wake-up source in sysfs timekeeping: Use proper timekeeper for debug code kselftests: timers: set-timer-lat: Add one-shot timer test cases kselftests: timers: set-timer-lat: Tweak reporting when timer fires early kselftests: timers: freq-step: Fix build warning kselftests: timers: freq-step: Define ADJ_SETOFFSET if device has older kernel headers
Diffstat (limited to 'tools/testing/selftests/timers')
-rw-r--r--tools/testing/selftests/timers/freq-step.c8
-rw-r--r--tools/testing/selftests/timers/set-timer-lat.c103
2 files changed, 96 insertions, 15 deletions
diff --git a/tools/testing/selftests/timers/freq-step.c b/tools/testing/selftests/timers/freq-step.c
index 22312eb4c941..14a2b77fd012 100644
--- a/tools/testing/selftests/timers/freq-step.c
+++ b/tools/testing/selftests/timers/freq-step.c
@@ -33,6 +33,10 @@
#define MAX_FREQ_ERROR 10e-6
#define MAX_STDDEV 1000e-9
+#ifndef ADJ_SETOFFSET
+ #define ADJ_SETOFFSET 0x0100
+#endif
+
struct sample {
double offset;
double time;
@@ -261,7 +265,7 @@ int main(int argc, char **argv)
set_frequency(0.0);
if (fails)
- ksft_exit_fail();
+ return ksft_exit_fail();
- ksft_exit_pass();
+ return ksft_exit_pass();
}
diff --git a/tools/testing/selftests/timers/set-timer-lat.c b/tools/testing/selftests/timers/set-timer-lat.c
index 4fc98c5b0899..15434da23b04 100644
--- a/tools/testing/selftests/timers/set-timer-lat.c
+++ b/tools/testing/selftests/timers/set-timer-lat.c
@@ -20,6 +20,7 @@
*/
+#include <errno.h>
#include <stdio.h>
#include <unistd.h>
#include <time.h>
@@ -63,6 +64,7 @@ int alarmcount;
int clock_id;
struct timespec start_time;
long long max_latency_ns;
+int timer_fired_early;
char *clockstring(int clockid)
{
@@ -115,16 +117,23 @@ void sigalarm(int signo)
delta_ns -= NSEC_PER_SEC * TIMER_SECS * alarmcount;
if (delta_ns < 0)
- printf("%s timer fired early: FAIL\n", clockstring(clock_id));
+ timer_fired_early = 1;
if (delta_ns > max_latency_ns)
max_latency_ns = delta_ns;
}
-int do_timer(int clock_id, int flags)
+void describe_timer(int flags, int interval)
+{
+ printf("%-22s %s %s ",
+ clockstring(clock_id),
+ flags ? "ABSTIME":"RELTIME",
+ interval ? "PERIODIC":"ONE-SHOT");
+}
+
+int setup_timer(int clock_id, int flags, int interval, timer_t *tm1)
{
struct sigevent se;
- timer_t tm1;
struct itimerspec its1, its2;
int err;
@@ -136,8 +145,9 @@ int do_timer(int clock_id, int flags)
max_latency_ns = 0;
alarmcount = 0;
+ timer_fired_early = 0;
- err = timer_create(clock_id, &se, &tm1);
+ err = timer_create(clock_id, &se, tm1);
if (err) {
if ((clock_id == CLOCK_REALTIME_ALARM) ||
(clock_id == CLOCK_BOOTTIME_ALARM)) {
@@ -158,32 +168,97 @@ int do_timer(int clock_id, int flags)
its1.it_value.tv_sec = TIMER_SECS;
its1.it_value.tv_nsec = 0;
}
- its1.it_interval.tv_sec = TIMER_SECS;
+ its1.it_interval.tv_sec = interval;
its1.it_interval.tv_nsec = 0;
- err = timer_settime(tm1, flags, &its1, &its2);
+ err = timer_settime(*tm1, flags, &its1, &its2);
if (err) {
printf("%s - timer_settime() failed\n", clockstring(clock_id));
return -1;
}
- while (alarmcount < 5)
- sleep(1);
+ return 0;
+}
- printf("%-22s %s max latency: %10lld ns : ",
- clockstring(clock_id),
- flags ? "ABSTIME":"RELTIME",
- max_latency_ns);
+int check_timer_latency(int flags, int interval)
+{
+ int err = 0;
+
+ describe_timer(flags, interval);
+ printf("timer fired early: %7d : ", timer_fired_early);
+ if (!timer_fired_early) {
+ printf("[OK]\n");
+ } else {
+ printf("[FAILED]\n");
+ err = -1;
+ }
+
+ describe_timer(flags, interval);
+ printf("max latency: %10lld ns : ", max_latency_ns);
- timer_delete(tm1);
if (max_latency_ns < UNRESONABLE_LATENCY) {
printf("[OK]\n");
+ } else {
+ printf("[FAILED]\n");
+ err = -1;
+ }
+ return err;
+}
+
+int check_alarmcount(int flags, int interval)
+{
+ describe_timer(flags, interval);
+ printf("count: %19d : ", alarmcount);
+ if (alarmcount == 1) {
+ printf("[OK]\n");
return 0;
}
printf("[FAILED]\n");
return -1;
}
+int do_timer(int clock_id, int flags)
+{
+ timer_t tm1;
+ const int interval = TIMER_SECS;
+ int err;
+
+ err = setup_timer(clock_id, flags, interval, &tm1);
+ if (err)
+ return err;
+
+ while (alarmcount < 5)
+ sleep(1);
+
+ timer_delete(tm1);
+ return check_timer_latency(flags, interval);
+}
+
+int do_timer_oneshot(int clock_id, int flags)
+{
+ timer_t tm1;
+ const int interval = 0;
+ struct timeval timeout;
+ fd_set fds;
+ int err;
+
+ err = setup_timer(clock_id, flags, interval, &tm1);
+ if (err)
+ return err;
+
+ memset(&timeout, 0, sizeof(timeout));
+ timeout.tv_sec = 5;
+ FD_ZERO(&fds);
+ do {
+ err = select(FD_SETSIZE, &fds, NULL, NULL, &timeout);
+ } while (err == -1 && errno == EINTR);
+
+ timer_delete(tm1);
+ err = check_timer_latency(flags, interval);
+ err |= check_alarmcount(flags, interval);
+ return err;
+}
+
int main(void)
{
struct sigaction act;
@@ -209,6 +284,8 @@ int main(void)
ret |= do_timer(clock_id, TIMER_ABSTIME);
ret |= do_timer(clock_id, 0);
+ ret |= do_timer_oneshot(clock_id, TIMER_ABSTIME);
+ ret |= do_timer_oneshot(clock_id, 0);
}
if (ret)
return ksft_exit_fail();