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author | marha <marha@users.sourceforge.net> | 2011-07-18 10:51:09 +0200 |
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committer | marha <marha@users.sourceforge.net> | 2011-07-18 10:51:09 +0200 |
commit | 3c0d2312573b81e3067bea610a58b1940c075e05 (patch) | |
tree | 3f025a27d813374f225957801226aa8ee829a33a /pthreads/tests/stress1.c | |
parent | ba033884541714680fd7552ab9d6c8817650f7d8 (diff) | |
parent | 88101146f2ec7d53ffb793e365f05097ffd35fd3 (diff) | |
download | vcxsrv-3c0d2312573b81e3067bea610a58b1940c075e05.tar.gz vcxsrv-3c0d2312573b81e3067bea610a58b1940c075e05.tar.bz2 vcxsrv-3c0d2312573b81e3067bea610a58b1940c075e05.zip |
Merge remote-tracking branch 'origin/released'
Conflicts:
X11/Xfuncproto.h.in
X11/configure.ac
X11/keysymdef.h
freetype/include/freetype/internal/pcftypes.h
freetype/src/cache/ftcbasic.c
freetype/src/cache/ftccmap.c
mesalib/src/glsl/ir.h
mesalib/src/glsl/link_functions.cpp
mesalib/src/mesa/main/dlist.c
mesalib/src/mesa/program/prog_optimize.c
mesalib/src/mesa/state_tracker/st_program.c
pthreads/Makefile
Diffstat (limited to 'pthreads/tests/stress1.c')
-rw-r--r-- | pthreads/tests/stress1.c | 556 |
1 files changed, 278 insertions, 278 deletions
diff --git a/pthreads/tests/stress1.c b/pthreads/tests/stress1.c index ac882503c..7c787dcfb 100644 --- a/pthreads/tests/stress1.c +++ b/pthreads/tests/stress1.c @@ -1,278 +1,278 @@ -/*
- * stress1.c
- *
- *
- * --------------------------------------------------------------------------
- *
- * Pthreads-win32 - POSIX Threads Library for Win32
- * Copyright(C) 1998 John E. Bossom
- * Copyright(C) 1999,2005 Pthreads-win32 contributors
- *
- * Contact Email: rpj@callisto.canberra.edu.au
- *
- * The current list of contributors is contained
- * in the file CONTRIBUTORS included with the source
- * code distribution. The list can also be seen at the
- * following World Wide Web location:
- * http://sources.redhat.com/pthreads-win32/contributors.html
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This library 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
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library in the file COPYING.LIB;
- * if not, write to the Free Software Foundation, Inc.,
- * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
- *
- * --------------------------------------------------------------------------
- *
- * Test Synopsis:
- * - Stress test condition variables, mutexes, semaphores.
- *
- * Test Method (Validation or Falsification):
- * - Validation
- *
- * Requirements Tested:
- * - Correct accounting of semaphore and condition variable waiters.
- *
- * Features Tested:
- * -
- *
- * Cases Tested:
- * -
- *
- * Description:
- * Attempting to expose race conditions in cond vars, semaphores etc.
- * - Master attempts to signal slave close to when timeout is due.
- * - Master and slave do battle continuously until main tells them to stop.
- * - Afterwards, the CV must be successfully destroyed (will return an
- * error if there are waiters (including any internal semaphore waiters,
- * which, if there are, cannot be real waiters).
- *
- * Environment:
- * -
- *
- * Input:
- * - None.
- *
- * Output:
- * - File name, Line number, and failed expression on failure.
- * - No output on success.
- *
- * Assumptions:
- * -
- *
- * Pass Criteria:
- * - CV is successfully destroyed.
- *
- * Fail Criteria:
- * - CV destroy fails.
- */
-
-#include "test.h"
-#include <string.h>
-#include <sys/timeb.h>
-
-
-const unsigned int ITERATIONS = 1000;
-
-static pthread_t master, slave;
-typedef struct {
- int value;
- pthread_cond_t cv;
- pthread_mutex_t mx;
-} mysig_t;
-
-static int allExit;
-static mysig_t control = {0, PTHREAD_COND_INITIALIZER, PTHREAD_MUTEX_INITIALIZER};
-static pthread_barrier_t startBarrier, readyBarrier, holdBarrier;
-static int timeoutCount = 0;
-static int signalsTakenCount = 0;
-static int signalsSent = 0;
-static int bias = 0;
-static int timeout = 10; // Must be > 0
-
-enum {
- CTL_STOP = -1
-};
-
-/*
- * Returns abstime 'milliseconds' from 'now'.
- *
- * Works for: -INT_MAX <= millisecs <= INT_MAX
- */
-struct timespec *
-millisecondsFromNow (struct timespec * time, int millisecs)
-{
- struct _timeb currSysTime;
- int64_t nanosecs, secs;
- const int64_t NANOSEC_PER_MILLISEC = 1000000;
- const int64_t NANOSEC_PER_SEC = 1000000000;
-
- /* get current system time and add millisecs */
- _ftime(&currSysTime);
-
- secs = (int64_t)(currSysTime.time) + (millisecs / 1000);
- nanosecs = ((int64_t) (millisecs%1000 + currSysTime.millitm)) * NANOSEC_PER_MILLISEC;
- if (nanosecs >= NANOSEC_PER_SEC)
- {
- secs++;
- nanosecs -= NANOSEC_PER_SEC;
- }
- else if (nanosecs < 0)
- {
- secs--;
- nanosecs += NANOSEC_PER_SEC;
- }
-
- time->tv_nsec = (long)nanosecs;
- time->tv_sec = (long)secs;
-
- return time;
-}
-
-void *
-masterThread (void * arg)
-{
- int dither = (int) arg;
-
- timeout = (int) arg;
-
- pthread_barrier_wait(&startBarrier);
-
- do
- {
- int sleepTime;
-
- assert(pthread_mutex_lock(&control.mx) == 0);
- control.value = timeout;
- assert(pthread_mutex_unlock(&control.mx) == 0);
-
- /*
- * We are attempting to send the signal close to when the slave
- * is due to timeout. We feel around by adding some [non-random] dither.
- *
- * dither is in the range 2*timeout peak-to-peak
- * sleep time is the average of timeout plus dither.
- * e.g.
- * if timeout = 10 then dither = 20 and
- * sleep millisecs is: 5 <= ms <= 15
- *
- * The bias value attempts to apply some negative feedback to keep
- * the ratio of timeouts to signals taken close to 1:1.
- * bias changes more slowly than dither so as to average more.
- *
- * Finally, if abs(bias) exceeds timeout then timeout is incremented.
- */
- if (signalsSent % timeout == 0)
- {
- if (timeoutCount > signalsTakenCount)
- {
- bias++;
- }
- else if (timeoutCount < signalsTakenCount)
- {
- bias--;
- }
- if (bias < -timeout || bias > timeout)
- {
- timeout++;
- }
- }
- dither = (dither + 1 ) % (timeout * 2);
- sleepTime = (timeout - bias + dither) / 2;
- Sleep(sleepTime);
- assert(pthread_cond_signal(&control.cv) == 0);
- signalsSent++;
-
- pthread_barrier_wait(&holdBarrier);
- pthread_barrier_wait(&readyBarrier);
- }
- while (!allExit);
-
- return NULL;
-}
-
-void *
-slaveThread (void * arg)
-{
- struct timespec time;
-
- pthread_barrier_wait(&startBarrier);
-
- do
- {
- assert(pthread_mutex_lock(&control.mx) == 0);
- if (pthread_cond_timedwait(&control.cv,
- &control.mx,
- millisecondsFromNow(&time, control.value)) == ETIMEDOUT)
- {
- timeoutCount++;
- }
- else
- {
- signalsTakenCount++;
- }
- assert(pthread_mutex_unlock(&control.mx) == 0);
-
- pthread_barrier_wait(&holdBarrier);
- pthread_barrier_wait(&readyBarrier);
- }
- while (!allExit);
-
- return NULL;
-}
-
-int
-main ()
-{
- unsigned int i;
-
- assert(pthread_barrier_init(&startBarrier, NULL, 3) == 0);
- assert(pthread_barrier_init(&readyBarrier, NULL, 3) == 0);
- assert(pthread_barrier_init(&holdBarrier, NULL, 3) == 0);
-
- assert(pthread_create(&master, NULL, masterThread, (void *) timeout) == 0);
- assert(pthread_create(&slave, NULL, slaveThread, NULL) == 0);
-
- allExit = FALSE;
-
- pthread_barrier_wait(&startBarrier);
-
- for (i = 1; !allExit; i++)
- {
- pthread_barrier_wait(&holdBarrier);
- if (i >= ITERATIONS)
- {
- allExit = TRUE;
- }
- pthread_barrier_wait(&readyBarrier);
- }
-
- assert(pthread_join(slave, NULL) == 0);
- assert(pthread_join(master, NULL) == 0);
-
- printf("Signals sent = %d\nWait timeouts = %d\nSignals taken = %d\nBias = %d\nTimeout = %d\n",
- signalsSent,
- timeoutCount,
- signalsTakenCount,
- (int) bias,
- timeout);
-
- /* Cleanup */
- assert(pthread_barrier_destroy(&holdBarrier) == 0);
- assert(pthread_barrier_destroy(&readyBarrier) == 0);
- assert(pthread_barrier_destroy(&startBarrier) == 0);
- assert(pthread_cond_destroy(&control.cv) == 0);
- assert(pthread_mutex_destroy(&control.mx) == 0);
-
- /* Success. */
- return 0;
-}
+/* + * stress1.c + * + * + * -------------------------------------------------------------------------- + * + * Pthreads-win32 - POSIX Threads Library for Win32 + * Copyright(C) 1998 John E. Bossom + * Copyright(C) 1999,2005 Pthreads-win32 contributors + * + * Contact Email: rpj@callisto.canberra.edu.au + * + * The current list of contributors is contained + * in the file CONTRIBUTORS included with the source + * code distribution. The list can also be seen at the + * following World Wide Web location: + * http://sources.redhat.com/pthreads-win32/contributors.html + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2 of the License, or (at your option) any later version. + * + * This library 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 + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library in the file COPYING.LIB; + * if not, write to the Free Software Foundation, Inc., + * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA + * + * -------------------------------------------------------------------------- + * + * Test Synopsis: + * - Stress test condition variables, mutexes, semaphores. + * + * Test Method (Validation or Falsification): + * - Validation + * + * Requirements Tested: + * - Correct accounting of semaphore and condition variable waiters. + * + * Features Tested: + * - + * + * Cases Tested: + * - + * + * Description: + * Attempting to expose race conditions in cond vars, semaphores etc. + * - Master attempts to signal slave close to when timeout is due. + * - Master and slave do battle continuously until main tells them to stop. + * - Afterwards, the CV must be successfully destroyed (will return an + * error if there are waiters (including any internal semaphore waiters, + * which, if there are, cannot be real waiters). + * + * Environment: + * - + * + * Input: + * - None. + * + * Output: + * - File name, Line number, and failed expression on failure. + * - No output on success. + * + * Assumptions: + * - + * + * Pass Criteria: + * - CV is successfully destroyed. + * + * Fail Criteria: + * - CV destroy fails. + */ + +#include "test.h" +#include <string.h> +#include <sys/timeb.h> + + +const unsigned int ITERATIONS = 1000; + +static pthread_t master, slave; +typedef struct { + int value; + pthread_cond_t cv; + pthread_mutex_t mx; +} mysig_t; + +static int allExit; +static mysig_t control = {0, PTHREAD_COND_INITIALIZER, PTHREAD_MUTEX_INITIALIZER}; +static pthread_barrier_t startBarrier, readyBarrier, holdBarrier; +static int timeoutCount = 0; +static int signalsTakenCount = 0; +static int signalsSent = 0; +static int bias = 0; +static int timeout = 10; // Must be > 0 + +enum { + CTL_STOP = -1 +}; + +/* + * Returns abstime 'milliseconds' from 'now'. + * + * Works for: -INT_MAX <= millisecs <= INT_MAX + */ +struct timespec * +millisecondsFromNow (struct timespec * time, int millisecs) +{ + PTW32_STRUCT_TIMEB currSysTime; + int64_t nanosecs, secs; + const int64_t NANOSEC_PER_MILLISEC = 1000000; + const int64_t NANOSEC_PER_SEC = 1000000000; + + /* get current system time and add millisecs */ + PTW32_FTIME(&currSysTime); + + secs = (int64_t)(currSysTime.time) + (millisecs / 1000); + nanosecs = ((int64_t) (millisecs%1000 + currSysTime.millitm)) * NANOSEC_PER_MILLISEC; + if (nanosecs >= NANOSEC_PER_SEC) + { + secs++; + nanosecs -= NANOSEC_PER_SEC; + } + else if (nanosecs < 0) + { + secs--; + nanosecs += NANOSEC_PER_SEC; + } + + time->tv_nsec = (long)nanosecs; + time->tv_sec = (long)secs; + + return time; +} + +void * +masterThread (void * arg) +{ + int dither = (int)(size_t)arg; + + timeout = (int)(size_t)arg; + + pthread_barrier_wait(&startBarrier); + + do + { + int sleepTime; + + assert(pthread_mutex_lock(&control.mx) == 0); + control.value = timeout; + assert(pthread_mutex_unlock(&control.mx) == 0); + + /* + * We are attempting to send the signal close to when the slave + * is due to timeout. We feel around by adding some [non-random] dither. + * + * dither is in the range 2*timeout peak-to-peak + * sleep time is the average of timeout plus dither. + * e.g. + * if timeout = 10 then dither = 20 and + * sleep millisecs is: 5 <= ms <= 15 + * + * The bias value attempts to apply some negative feedback to keep + * the ratio of timeouts to signals taken close to 1:1. + * bias changes more slowly than dither so as to average more. + * + * Finally, if abs(bias) exceeds timeout then timeout is incremented. + */ + if (signalsSent % timeout == 0) + { + if (timeoutCount > signalsTakenCount) + { + bias++; + } + else if (timeoutCount < signalsTakenCount) + { + bias--; + } + if (bias < -timeout || bias > timeout) + { + timeout++; + } + } + dither = (dither + 1 ) % (timeout * 2); + sleepTime = (timeout - bias + dither) / 2; + Sleep(sleepTime); + assert(pthread_cond_signal(&control.cv) == 0); + signalsSent++; + + pthread_barrier_wait(&holdBarrier); + pthread_barrier_wait(&readyBarrier); + } + while (!allExit); + + return NULL; +} + +void * +slaveThread (void * arg) +{ + struct timespec time; + + pthread_barrier_wait(&startBarrier); + + do + { + assert(pthread_mutex_lock(&control.mx) == 0); + if (pthread_cond_timedwait(&control.cv, + &control.mx, + millisecondsFromNow(&time, control.value)) == ETIMEDOUT) + { + timeoutCount++; + } + else + { + signalsTakenCount++; + } + assert(pthread_mutex_unlock(&control.mx) == 0); + + pthread_barrier_wait(&holdBarrier); + pthread_barrier_wait(&readyBarrier); + } + while (!allExit); + + return NULL; +} + +int +main () +{ + unsigned int i; + + assert(pthread_barrier_init(&startBarrier, NULL, 3) == 0); + assert(pthread_barrier_init(&readyBarrier, NULL, 3) == 0); + assert(pthread_barrier_init(&holdBarrier, NULL, 3) == 0); + + assert(pthread_create(&master, NULL, masterThread, (void *)(size_t)timeout) == 0); + assert(pthread_create(&slave, NULL, slaveThread, NULL) == 0); + + allExit = FALSE; + + pthread_barrier_wait(&startBarrier); + + for (i = 1; !allExit; i++) + { + pthread_barrier_wait(&holdBarrier); + if (i >= ITERATIONS) + { + allExit = TRUE; + } + pthread_barrier_wait(&readyBarrier); + } + + assert(pthread_join(slave, NULL) == 0); + assert(pthread_join(master, NULL) == 0); + + printf("Signals sent = %d\nWait timeouts = %d\nSignals taken = %d\nBias = %d\nTimeout = %d\n", + signalsSent, + timeoutCount, + signalsTakenCount, + (int) bias, + timeout); + + /* Cleanup */ + assert(pthread_barrier_destroy(&holdBarrier) == 0); + assert(pthread_barrier_destroy(&readyBarrier) == 0); + assert(pthread_barrier_destroy(&startBarrier) == 0); + assert(pthread_cond_destroy(&control.cv) == 0); + assert(pthread_mutex_destroy(&control.mx) == 0); + + /* Success. */ + return 0; +} |