Thanks Mathias/Manas for this contribution. Added to LTP.
Regards--
Subrata
On Mon, 2009-04-13 at 17:57 +0530, Manas K Nayak wrote:
> 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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