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authorRoland McGrath <roland@gnu.org>2005-04-27 08:03:47 +0000
committerRoland McGrath <roland@gnu.org>2005-04-27 08:03:47 +0000
commit84060bad8250d366c925f66bfba03efce9f4265c (patch)
tree9a7e4f3e4bb5d0e6b3da14712712ec38f79e4a95 /rt/tst-cputimer2.c
parent2f4f3bd4a9ad805383b278e5b975971ca15c7a77 (diff)
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* rt/tst-cpuclock1.c: New file.
* rt/tst-cpuclock2.c: New file. * rt/tst-cputimer1.c: New file. * rt/tst-cputimer2.c: New file. * rt/tst-cputimer3.c: New file. * rt/Makefile (tests): Add them. * sysdeps/unix/sysv/linux/kernel-posix-cpu-timers.h: New file. * sysdeps/unix/sysv/linux/clock_getcpuclockid.c: New file. * sysdeps/unix/sysv/linux/ia64/clock_getcpuclockid.c (HAS_CPUCLOCK): New macro. (clock_getcpuclockid): Function removed. #include the new linux file to define it instead. * sysdeps/unix/clock_gettime.c [HP_TIMING_AVAIL] (hp_timing_gettime): New function, broken out of ... (clock_gettime) [HP_TIMING_AVAIL]: ... here. Call it. (realtime_gettime): New function, broken out of ... (clock_gettime) [! HANDLED_REALTIME]: ... here. Call it. (clock_gettime) [SYSDEP_GETTIME_CPU]: Use new macro in default case. * sysdeps/unix/sysv/linux/clock_gettime.c (SYSCALL_GETTIME): New macro. (SYSDEP_GETTIME_CPUTIME): New macro. (SYSDEP_GETTIME): Use both. [! __ASSUME_POSIX_TIMERS] (maybe_syscall_gettime): New function, broken out of ... (SYSDEP_GETTIME): ... here. Use it. [__NR_clock_gettime] (HANDLED_CPUTIME): Define it. (SYSDEP_GETTIME_CPUTIME): New macro. Handle CPU timers by trying kernel support and falling back to hp-timing code. * sysdeps/posix/clock_getres.c [HP_TIMING_AVAIL] (hp_timing_getres): New function, broken out of ... (clock_getres) [HP_TIMING_AVAIL]: ... here. Call it. (realtime_getres): New function, broken out of ... (clock_getres) [! HANDLED_REALTIME]: ... here. Call it. (clock_getres) [SYSDEP_GETRES_CPU]: Use new macro in default case. * sysdeps/unix/sysv/linux/clock_getres.c (SYSCALL_GETRES): New macro. (SYSDEP_GETRES_CPUTIME): New macro. (SYSDEP_GETRES): Use both. [! __ASSUME_POSIX_TIMERS] (maybe_syscall_getres): New function, broken out of ... (SYSDEP_GETRES): ... here. Use it. [__NR_clock_getres] (HANDLED_CPUTIME): Define it. (SYSDEP_GETRES_CPUTIME): New macro. Handle CPU timers by trying kernel support and falling back to hp-timing code. * sysdeps/unix/sysv/linux/clock_nanosleep.c: Handle CLOCK_PROCESS_CPUTIME_ID and CLOCK_PROCESS_THREAD_ID specially, translating to the kernel clockid_t for our own process/thread clock.
Diffstat (limited to 'rt/tst-cputimer2.c')
-rw-r--r--rt/tst-cputimer2.c83
1 files changed, 83 insertions, 0 deletions
diff --git a/rt/tst-cputimer2.c b/rt/tst-cputimer2.c
new file mode 100644
index 0000000..397d799
--- /dev/null
+++ b/rt/tst-cputimer2.c
@@ -0,0 +1,83 @@
+/* Tests for POSIX timer implementation using thread CPU clock. */
+
+#include <unistd.h>
+
+#if _POSIX_THREADS && defined _POSIX_CPUTIME
+
+#include <errno.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <fcntl.h>
+#include <time.h>
+#include <pthread.h>
+
+static clockid_t worker_thread_clock;
+
+#define TEST_CLOCK worker_thread_clock
+#define TEST_CLOCK_MISSING(clock) \
+ (setup_test () ? "thread CPU clock timer support" : NULL)
+
+/* This function is intended to rack up both user and system time. */
+static void *
+chew_cpu (void *arg)
+{
+ while (1)
+ {
+ static volatile char buf[4096];
+ for (int i = 0; i < 100; ++i)
+ for (size_t j = 0; j < sizeof buf; ++j)
+ buf[j] = 0xaa;
+ int nullfd = open ("/dev/null", O_WRONLY);
+ for (int i = 0; i < 100; ++i)
+ for (size_t j = 0; j < sizeof buf; ++j)
+ buf[j] = 0xbb;
+ write (nullfd, (char *) buf, sizeof buf);
+ close (nullfd);
+ }
+
+ return NULL;
+}
+
+static int
+setup_test (void)
+{
+ /* Test timers on a thread CPU clock by having a worker thread eating
+ CPU. First make sure we can make such timers at all. */
+
+ pthread_t th;
+ int e = pthread_create (&th, NULL, chew_cpu, NULL);
+ if (e != 0)
+ {
+ printf ("pthread_create: %s\n", strerror (e));
+ exit (1);
+ }
+
+ e = pthread_getcpuclockid (th, &worker_thread_clock);
+ if (e == EPERM || e == ENOENT || e == ENOTSUP)
+ {
+ puts ("pthread_getcpuclockid does not support other threads");
+ return 1;
+ }
+ if (e != 0)
+ {
+ printf ("pthread_getcpuclockid: %s\n", strerror (e));
+ exit (1);
+ }
+
+ timer_t t;
+ if (timer_create (TEST_CLOCK, NULL, &t) != 0)
+ {
+ printf ("timer_create: %m\n");
+ return 1;
+ }
+ timer_delete (t);
+
+ return 0;
+}
+
+#else
+# define TEST_CLOCK_MISSING(clock) "process clocks"
+#endif
+
+#include "tst-timer4.c"