Hi Mathias,
>Hi all!
>I am using kernel 2.6.29.1 from kernel.org on a Debian 5.0 (Lenny) system
>(Intel Core2Quad).
>GCC is 4.3.2
>I have not set CONFIG_CC_OPT_SIZE.
>
>When I use clock_nanosleep with TIMER_ABSTIME with gdb and stop the execution
>by CTRL-C,
>I cannot continue the execution of my program when it interrupted the
>clock_nanosleep call.
>
>When I set the kernel config parameter CONFIG_CC_OPT_SIZE everything is fine.
>There seems to be an optimization issue that is related to the clock_nanosleep
>system call.
>
>Some more remarks:
>When I use relative times (mode set to 0) everything works fine in both cases.
>CONFIG_TICK_ONESHOT=y
>CONFIG_HIGH_RES_TIMERS=y
>
>
>Here is my tiny test program that demonstrates the behaviour:
>Let it run in gdb, interrupt it (CTRL-C) and try to continue "c".
>
>***************** BEGIN ************************
>#define _GNU_SOURCE
>#include <stdio.h>
>#include <time.h>
>#include <unistd.h>
>#include <sys/syscall.h>
>#include <linux/unistd.h>
>
>const clockid_t CLOCK_TO_USE=CLOCK_MONOTONIC;
>static int clock_nanosleep2(clockid_t clock_id, int flags, const struct
>timespec *req,
> struct timespec *rem)
>{
> return syscall(__NR_clock_nanosleep, clock_id, flags, req, rem);
>}
>
>int main(void)
>{
> int i;
> struct timespec ts;
> clock_gettime(CLOCK_TO_USE, &ts);
>
> for (i=0; i<=1000; i++)
> {
> ts.tv_sec++;
> clock_nanosleep2(CLOCK_TO_USE, TIMER_ABSTIME, &ts, NULL);
> // clock_nanosleep(CLOCK_TO_USE, TIMER_ABSTIME, &ts, NULL);
> printf("%i\n",i);
> }
>
> return 0;
>}
>
>/* Build with
> gcc test_clock_nanosleep.c -g -Wall -lrt
>*/
>**************** END *******************
>
>Thanks for all feedback on that issue
I picked up this test porgram written by you from LKML, and has ported the
same to LTP under GPL. If you would agree, we can contribute this small
test to LTP. The below patch does that for you.
Original-Author: M. Koehrer <[email protected]>,
Ported-To-LTP-By: Manas K Nayak <[email protected]>,
---
---
ltp-full-20090331.orig/testcases/kernel/syscalls/clock_nanosleep2/clock_nanosleep2_01.c
1970-01-01 05:30:00.000000000 +0530
+++
ltp-full-20090331/testcases/kernel/syscalls/clock_nanosleep2/clock_nanosleep2_01.c
2009-04-13 16:50:18.000000000 +0530
@@ -0,0 +1,155 @@
+/******************************************************************************/
+/* Copyright (c) M. Koehrer <[email protected]>, 2009
*/
+/*
*/
+/* LKML Reference: http://lkml.org/lkml/2009/4/9/89
*/
+/*
*/
+/* 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
*/
+/*
*/
+/******************************************************************************/
+/******************************************************************************/
+/*
*/
+/* File: clock_nanosleep2_01.c
*/
+/*
*/
+/* Description: This tests the clock_nanosleep2-out() syscall
*/
+/*
*/
+/* Usage: <for command-line>
*/
+/* clock_nanosleep2_01 [-c n] [-e][-i n] [-I x] [-p x] [-t]
*/
+/* where, -c n : Run n copies concurrently.
*/
+/* -e : Turn on errno logging.
*/
+/* -i n : Execute test n times.
*/
+/* -I x : Execute test for x seconds.
*/
+/* -P x : Pause for x seconds between iterations.
*/
+/* -t : Turn on syscall timing.
*/
+/*
*/
+/* Total Tests: 1
*/
+/*
*/
+/* Test Name: clock_nanosleep2_01
*/
+/******************************************************************************/
+#define _GNU_SOURCE
+#include <stdio.h>
+#include <time.h>
+#include <unistd.h>
+#include <sys/syscall.h>
+#include <linux/unistd.h>
+
+/* Harness Specific Include Files. */
+#include "test.h"
+#include "usctest.h"
+#include "linux_syscall_numbers.h"
+
+/* Extern Global Variables */
+extern int Tst_count; /* counter for tst_xxx routines. */
+extern char *TESTDIR; /* temporary dir created by tst_tmpdir() */
+
+/* Global Variables */
+char *TCID = "clock_nanosleep2_01"; /* Test program identifier.*/
+int testno;
+int TST_TOTAL = 1; /* total number of tests in this file.
*/
+
+/* Extern Global Functions */
+/******************************************************************************/
+/*
*/
+/* Function: cleanup
*/
+/*
*/
+/* Description: Performs all one time clean up for this test on successful
*/
+/* completion, premature exit or failure. Closes all temporary
*/
+/* files, removes all temporary directories exits the test with
*/
+/* appropriate return code by calling tst_exit() function.
*/
+/*
*/
+/* Input: None.
*/
+/*
*/
+/* Output: None.
*/
+/*
*/
+/* Return: On failure - Exits calling tst_exit(). Non '0' return code.
*/
+/* On success - Exits calling tst_exit(). With '0' return code.
*/
+/*
*/
+/******************************************************************************/
+extern void cleanup() {
+ /* Remove tmp dir and all files in it */
+ TEST_CLEANUP;
+ tst_rmdir();
+
+ /* Exit with appropriate return code. */
+ tst_exit();
+}
+
+/* Local Functions */
+/******************************************************************************/
+/*
*/
+/* Function: setup
*/
+/*
*/
+/* Description: Performs all one time setup for this test. This function is
*/
+/* typically used to capture signals, create temporary dirs
*/
+/* and temporary files that may be used in the course of this
*/
+/* test.
*/
+/*
*/
+/* Input: None.
*/
+/*
*/
+/* Output: None.
*/
+/*
*/
+/* Return: On failure - Exits by calling cleanup().
*/
+/* On success - returns 0.
*/
+/*
*/
+/******************************************************************************/
+void setup() {
+ /* Capture signals if any */
+ /* Create temporary directories */
+ TEST_PAUSE;
+ tst_tmpdir();
+}
+
+
+const clockid_t CLOCK_TO_USE=CLOCK_MONOTONIC;
+static int clock_nanosleep2(clockid_t clock_id, int flags, const struct
timespec *req,struct timespec *rem)
+{
+ return syscall(__NR_clock_nanosleep, clock_id, flags, req, rem);
+}
+
+
+int main(int ac, char **av) {
+ int i;
+ int lc; /* loop counter */
+ char *msg; /* message returned from parse_opts */
+ struct timespec ts;
+
+ /* parse standard options */
+ if ((msg = parse_opts(ac, av, (option_t *)NULL, NULL)) != (char
*)NULL){
+ tst_brkm(TBROK, cleanup, "OPTION PARSING ERROR - %s", msg);
+ tst_exit();
+ }
+
+ setup();
+
+ /* Check looping state if -i option given */
+ for (lc = 0; TEST_LOOPING(lc); ++lc) {
+ Tst_count = 0;
+ for (testno = 0; testno < TST_TOTAL; ++testno) {
+ TEST(clock_gettime(CLOCK_TO_USE, &ts));
+ for (i=0; i<=50; i++){
+ ts.tv_sec++;
+ TEST(clock_nanosleep2(CLOCK_TO_USE,
TIMER_ABSTIME, &ts, NULL));
+ if (TEST_ERRNO) {
+ tst_resm(TFAIL, "%s failed - errno = %d :
%s", TCID, TEST_ERRNO, strerror(TEST_ERRNO));
+ cleanup();
+ tst_exit();
+ }
+ tst_resm(TINFO,"Iteration = %i",i);
+ }
+ tst_resm(TPASS, "clock_nanosleep2() passed");
+ }
+ }
+ tst_exit();
+}
+
--- ltp-full-20090331.orig/testcases/kernel/syscalls/clock_nanosleep2/Makefile
1970-01-01 05:30:00.000000000 +0530
+++ ltp-full-20090331/testcases/kernel/syscalls/clock_nanosleep2/Makefile
2009-04-13 16:37:08.000000000 +0530
@@ -0,0 +1,31 @@
+#
+# Copyright (c) International Business Machines Corp., 2009
+#
+# 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+#
+
+CFLAGS += -I../../../../include -Wall
+LDLIBS += -L../../../../lib -lltp -lrt
+
+SRCS = $(wildcard *.c)
+TARGETS = $(patsubst %.c,%,$(SRCS))
+
+all: $(TARGETS)
+
+install:
+ @set -e; for i in $(TARGETS); do ln -f $$i ../../../bin/$$i ; done
+
+clean:
+ rm -f $(TARGETS)
--- ltp-full-20090331.orig/runtest/syscalls 2009-04-13 16:14:07.000000000
+0530
+++ ltp-full-20090331/runtest/syscalls 2009-04-13 17:02:05.000000000 +0530
@@ -67,6 +67,7 @@ chroot02 chroot02
chroot03 chroot03
chroot04 chroot04
+clock_nanosleep2_01 clock_nanosleep2_01
clone01 clone01
clone02 clone02
---
Regards--
Manas
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