Import timerfd test from Linux
authorBarret Rhoden <brho@cs.berkeley.edu>
Fri, 8 Apr 2016 15:51:51 +0000 (11:51 -0400)
committerBarret Rhoden <brho@cs.berkeley.edu>
Fri, 15 Apr 2016 14:29:13 +0000 (10:29 -0400)
From the Linux Test Project https://github.com/linux-test-project/ltp
commit b9b230e.

I named it .orig so we don't try to build it for Akaros with make tests.

Signed-off-by: Barret Rhoden <brho@cs.berkeley.edu>
tests/timerfd.c.orig [new file with mode: 0644]

diff --git a/tests/timerfd.c.orig b/tests/timerfd.c.orig
new file mode 100644 (file)
index 0000000..00bae88
--- /dev/null
@@ -0,0 +1,279 @@
+/*
+ *  timerfd() test by Davide Libenzi (test app for timerfd)
+ *  Copyright (C) 2007  Davide Libenzi
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ *
+ *  Davide Libenzi <davidel@xmailserver.org>
+ *
+ *
+ *     $ gcc -o timerfd-test2 timerfd-test2.c -lrt
+ *
+ * NAME
+ *     timerfd01.c
+ * HISTORY
+ *     28/05/2008 Initial contribution by Davide Libenzi <davidel@xmailserver.org>
+ *      28/05/2008 Integrated to LTP by Subrata Modak <subrata@linux.vnet.ibm.com>
+ */
+
+#define _GNU_SOURCE
+#include <sys/syscall.h>
+#include <sys/types.h>
+#include <sys/signal.h>
+#include <sys/time.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <signal.h>
+#include <poll.h>
+#include <fcntl.h>
+#include <time.h>
+#include <errno.h>
+#include "test.h"
+#include "linux_syscall_numbers.h"
+
+#define cleanup tst_exit
+
+char *TCID = "timerfd01";
+
+/*
+ * This were good at the time of 2.6.23-rc7 ...
+ *
+ * #ifdef __NR_timerfd
+ *
+ * ... but is not now with 2.6.25
+ */
+#ifdef __NR_timerfd_create
+
+/* Definitions from include/linux/timerfd.h */
+#define TFD_TIMER_ABSTIME (1 << 0)
+
+struct tmr_type {
+       int id;
+       char const *name;
+};
+
+unsigned long long getustime(int clockid)
+{
+       struct timespec tp;
+
+       if (clock_gettime((clockid_t) clockid, &tp)) {
+               perror("clock_gettime");
+               return 0;
+       }
+
+       return 1000000ULL * tp.tv_sec + tp.tv_nsec / 1000;
+}
+
+void set_timespec(struct timespec *tmr, unsigned long long ustime)
+{
+
+       tmr->tv_sec = (time_t) (ustime / 1000000ULL);
+       tmr->tv_nsec = (long)(1000ULL * (ustime % 1000000ULL));
+}
+
+int timerfd_create(int clockid, int flags)
+{
+
+       return ltp_syscall(__NR_timerfd_create, clockid, flags);
+}
+
+int timerfd_settime(int ufc, int flags, const struct itimerspec *utmr,
+                   struct itimerspec *otmr)
+{
+
+       return ltp_syscall(__NR_timerfd_settime, ufc, flags, utmr, otmr);
+}
+
+int timerfd_gettime(int ufc, struct itimerspec *otmr)
+{
+
+       return ltp_syscall(__NR_timerfd_gettime, ufc, otmr);
+}
+
+long waittmr(int tfd, int timeo)
+{
+       u_int64_t ticks;
+       struct pollfd pfd;
+
+       pfd.fd = tfd;
+       pfd.events = POLLIN;
+       pfd.revents = 0;
+       if (poll(&pfd, 1, timeo) < 0) {
+               perror("poll");
+               return -1;
+       }
+       if ((pfd.revents & POLLIN) == 0) {
+               fprintf(stdout, "no ticks happened\n");
+               return -1;
+       }
+       if (read(tfd, &ticks, sizeof(ticks)) != sizeof(ticks)) {
+               perror("timerfd read");
+               return -1;
+       }
+
+       return ticks;
+}
+
+int TST_TOTAL = 3;
+
+int main(int ac, char **av)
+{
+       int i, tfd;
+       long ticks;
+       unsigned long long tnow, ttmr;
+       u_int64_t uticks;
+       struct itimerspec tmr;
+       struct tmr_type clks[] = {
+               {CLOCK_MONOTONIC, "CLOCK MONOTONIC"},
+               {CLOCK_REALTIME, "CLOCK REALTIME"},
+       };
+
+       if ((tst_kvercmp(2, 6, 25)) < 0) {
+               tst_resm(TCONF, "This test can only run on kernels that are ");
+               tst_resm(TCONF, "2.6.25 and higher");
+               exit(0);
+       }
+
+       for (i = 0; i < sizeof(clks) / sizeof(clks[0]); i++) {
+               fprintf(stdout,
+                       "\n\n---------------------------------------\n");
+               fprintf(stdout, "| testing %s\n", clks[i].name);
+               fprintf(stdout, "---------------------------------------\n\n");
+
+               fprintf(stdout, "relative timer test (at 500 ms) ...\n");
+               set_timespec(&tmr.it_value, 500 * 1000);
+               set_timespec(&tmr.it_interval, 0);
+               tnow = getustime(clks[i].id);
+               if ((tfd = timerfd_create(clks[i].id, 0)) == -1) {
+                       perror("timerfd");
+                       return 1;
+               }
+               fprintf(stdout, "timerfd = %d\n", tfd);
+
+               if (timerfd_settime(tfd, 0, &tmr, NULL)) {
+                       perror("timerfd_settime");
+                       return 1;
+               }
+
+               fprintf(stdout, "wating timer ...\n");
+               ticks = waittmr(tfd, -1);
+               ttmr = getustime(clks[i].id);
+               if (ticks <= 0)
+                       fprintf(stdout, "whooops! no timer showed up!\n");
+               else
+                       fprintf(stdout, "got timer ticks (%ld) after %llu ms\n",
+                               ticks, (ttmr - tnow) / 1000);
+
+               fprintf(stdout, "absolute timer test (at 500 ms) ...\n");
+               tnow = getustime(clks[i].id);
+               set_timespec(&tmr.it_value, tnow + 500 * 1000);
+               set_timespec(&tmr.it_interval, 0);
+               if (timerfd_settime(tfd, TFD_TIMER_ABSTIME, &tmr, NULL)) {
+                       perror("timerfd_settime");
+                       return 1;
+               }
+
+               fprintf(stdout, "wating timer ...\n");
+               ticks = waittmr(tfd, -1);
+               ttmr = getustime(clks[i].id);
+               if (ticks <= 0)
+                       fprintf(stdout, "whooops! no timer showed up!\n");
+               else
+                       fprintf(stdout, "got timer ticks (%ld) after %llu ms\n",
+                               ticks, (ttmr - tnow) / 1000);
+
+               fprintf(stdout, "sequential timer test (100 ms clock) ...\n");
+               tnow = getustime(clks[i].id);
+               set_timespec(&tmr.it_value, tnow + 100 * 1000);
+               set_timespec(&tmr.it_interval, 100 * 1000);
+               if (timerfd_settime(tfd, TFD_TIMER_ABSTIME, &tmr, NULL)) {
+                       perror("timerfd_settime");
+                       return 1;
+               }
+
+               fprintf(stdout, "sleeping 1 second ...\n");
+               sleep(1);
+               if (timerfd_gettime(tfd, &tmr)) {
+                       perror("timerfd_gettime");
+                       return 1;
+               }
+               fprintf(stdout, "timerfd_gettime returned:\n"
+                       "\tit_value = { %ld, %ld } it_interval = { %ld, %ld }\n",
+                       (long)tmr.it_value.tv_sec, (long)tmr.it_value.tv_nsec,
+                       (long)tmr.it_interval.tv_sec,
+                       (long)tmr.it_interval.tv_nsec);
+               fprintf(stdout, "sleeping 1 second ...\n");
+               sleep(1);
+
+               fprintf(stdout, "wating timer ...\n");
+               ticks = waittmr(tfd, -1);
+               ttmr = getustime(clks[i].id);
+               if (ticks <= 0)
+                       fprintf(stdout, "whooops! no timer showed up!\n");
+               else
+                       fprintf(stdout, "got timer ticks (%ld) after %llu ms\n",
+                               ticks, (ttmr - tnow) / 1000);
+
+               fprintf(stdout, "O_NONBLOCK test ...\n");
+               tnow = getustime(clks[i].id);
+               set_timespec(&tmr.it_value, 100 * 1000);
+               set_timespec(&tmr.it_interval, 0);
+               if (timerfd_settime(tfd, 0, &tmr, NULL)) {
+                       perror("timerfd_settime");
+                       return 1;
+               }
+               fprintf(stdout, "timerfd = %d\n", tfd);
+
+               fprintf(stdout, "wating timer (flush the single tick) ...\n");
+               ticks = waittmr(tfd, -1);
+               ttmr = getustime(clks[i].id);
+               if (ticks <= 0)
+                       fprintf(stdout, "whooops! no timer showed up!\n");
+               else
+                       fprintf(stdout, "got timer ticks (%ld) after %llu ms\n",
+                               ticks, (ttmr - tnow) / 1000);
+
+               fcntl(tfd, F_SETFL, fcntl(tfd, F_GETFL, 0) | O_NONBLOCK);
+
+               if (read(tfd, &uticks, sizeof(uticks)) > 0)
+                       fprintf(stdout,
+                               "whooops! timer ticks not zero when should have been\n");
+               else if (errno != EAGAIN)
+                       fprintf(stdout,
+                               "whooops! bad errno value (%d = '%s')!\n",
+                               errno, strerror(errno));
+               else
+                       fprintf(stdout, "success\n");
+
+               fcntl(tfd, F_SETFL, fcntl(tfd, F_GETFL, 0) & ~O_NONBLOCK);
+
+               close(tfd);
+       }
+
+       tst_exit();
+}
+
+#else
+int TST_TOTAL = 0;
+
+int main(void)
+{
+
+       tst_brkm(TCONF, NULL,
+                "This test needs a kernel that has timerfd syscall.");
+}
+#endif