summaryrefslogtreecommitdiff
path: root/mozilla/nsprpub/pr/src/cplus/tests/switch.cpp
diff options
context:
space:
mode:
Diffstat (limited to 'mozilla/nsprpub/pr/src/cplus/tests/switch.cpp')
-rw-r--r--mozilla/nsprpub/pr/src/cplus/tests/switch.cpp266
1 files changed, 266 insertions, 0 deletions
diff --git a/mozilla/nsprpub/pr/src/cplus/tests/switch.cpp b/mozilla/nsprpub/pr/src/cplus/tests/switch.cpp
new file mode 100644
index 0000000..fddc580
--- /dev/null
+++ b/mozilla/nsprpub/pr/src/cplus/tests/switch.cpp
@@ -0,0 +1,266 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* ***** BEGIN LICENSE BLOCK *****
+ * Version: MPL 1.1/GPL 2.0/LGPL 2.1
+ *
+ * The contents of this file are subject to the Mozilla Public License Version
+ * 1.1 (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ * http://www.mozilla.org/MPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+ * for the specific language governing rights and limitations under the
+ * License.
+ *
+ * The Original Code is the Netscape Portable Runtime (NSPR).
+ *
+ * The Initial Developer of the Original Code is
+ * Netscape Communications Corporation.
+ * Portions created by the Initial Developer are Copyright (C) 1998-2000
+ * the Initial Developer. All Rights Reserved.
+ *
+ * Contributor(s):
+ *
+ * Alternatively, the contents of this file may be used under the terms of
+ * either the GNU General Public License Version 2 or later (the "GPL"), or
+ * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+ * in which case the provisions of the GPL or the LGPL are applicable instead
+ * of those above. If you wish to allow use of your version of this file only
+ * under the terms of either the GPL or the LGPL, and not to allow others to
+ * use your version of this file under the terms of the MPL, indicate your
+ * decision by deleting the provisions above and replace them with the notice
+ * and other provisions required by the GPL or the LGPL. If you do not delete
+ * the provisions above, a recipient may use your version of this file under
+ * the terms of any one of the MPL, the GPL or the LGPL.
+ *
+ * ***** END LICENSE BLOCK ***** */
+
+/*
+** File: switch.cpp
+** Description: trying to time context switches
+*/
+
+#include "rccv.h"
+#include "rcinrval.h"
+#include "rclock.h"
+#include "rcthread.h"
+
+#include <prio.h>
+#include <prlog.h>
+#include <prprf.h>
+#include <plerror.h>
+#include <plgetopt.h>
+
+#include <stdlib.h>
+
+#define INNER_LOOPS 100
+#define DEFAULT_LOOPS 100
+#define DEFAULT_THREADS 10
+
+static PRFileDesc *debug_out = NULL;
+static PRBool debug_mode = PR_FALSE, verbosity = PR_FALSE, failed = PR_FALSE;
+
+class Home: public RCCondition
+{
+public:
+ virtual ~Home();
+ Home(Home *link, RCLock* ml);
+
+public:
+ Home *next;
+ RCLock* ml;
+ PRBool twiddle;
+}; /* Home */
+
+Home::~Home() { }
+
+Home::Home(Home *link, RCLock* lock): RCCondition(lock)
+{
+ ml = lock;
+ next = link;
+ twiddle = PR_FALSE;
+} /* Home::Home */
+
+class Shared: public Home, public RCThread
+{
+public:
+ Shared(RCThread::Scope scope, Home* link, RCLock* ml);
+
+private:
+ ~Shared();
+ void RootFunction();
+}; /* Shared */
+
+Shared::Shared(RCThread::Scope scope, Home* link, RCLock* lock):
+ Home(link, lock), RCThread(scope, RCThread::joinable) { }
+
+Shared::~Shared() { }
+
+void Shared::RootFunction()
+{
+ PRStatus status = PR_SUCCESS;
+ while (PR_SUCCESS == status)
+ {
+ RCEnter entry(ml);
+ while (twiddle && (PR_SUCCESS == status)) status = Wait();
+ if (verbosity) PR_fprintf(debug_out, "+");
+ twiddle = PR_TRUE;
+ next->twiddle = PR_FALSE;
+ next->Notify();
+ }
+} /* Shared::RootFunction */
+
+static void Help(void)
+{
+ debug_out = PR_STDOUT;
+
+ PR_fprintf(
+ debug_out, "Usage: >./switch [-d] [-c n] [-t n] [-T n] [-G]\n");
+ PR_fprintf(
+ debug_out, "-c n\tloops at thread level (default: %d)\n", DEFAULT_LOOPS);
+ PR_fprintf(
+ debug_out, "-t n\tnumber of threads (default: %d)\n", DEFAULT_THREADS);
+ PR_fprintf(debug_out, "-d\tturn on debugging output (default: FALSE)\n");
+ PR_fprintf(debug_out, "-v\tturn on verbose output (default: FALSE)\n");
+ PR_fprintf(debug_out, "-G n\tglobal threads only (default: FALSE)\n");
+ PR_fprintf(debug_out, "-C n\tconcurrency setting (default: 1)\n");
+} /* Help */
+
+PRIntn main(PRIntn argc, char **argv)
+{
+ PLOptStatus os;
+ PRStatus status;
+ PRBool help = PR_FALSE;
+ PRUintn concurrency = 1;
+ RCThread::Scope thread_scope = RCThread::local;
+ PRUintn thread_count, inner_count, loop_count, average;
+ PRUintn thread_limit = DEFAULT_THREADS, loop_limit = DEFAULT_LOOPS;
+ PLOptState *opt = PL_CreateOptState(argc, argv, "hdvc:t:C:G");
+ while (PL_OPT_EOL != (os = PL_GetNextOpt(opt)))
+ {
+ if (PL_OPT_BAD == os) continue;
+ switch (opt->option)
+ {
+ case 'v': /* verbose mode */
+ verbosity = PR_TRUE;
+ case 'd': /* debug mode */
+ debug_mode = PR_TRUE;
+ break;
+ case 'c': /* loop counter */
+ loop_limit = atoi(opt->value);
+ break;
+ case 't': /* thread limit */
+ thread_limit = atoi(opt->value);
+ break;
+ case 'C': /* Concurrency limit */
+ concurrency = atoi(opt->value);
+ break;
+ case 'G': /* global threads only */
+ thread_scope = RCThread::global;
+ break;
+ case 'h': /* help message */
+ Help();
+ help = PR_TRUE;
+ break;
+ default:
+ break;
+ }
+ }
+ PL_DestroyOptState(opt);
+
+ if (help) return -1;
+
+ if (PR_TRUE == debug_mode)
+ {
+ debug_out = PR_STDOUT;
+ PR_fprintf(debug_out, "Test parameters\n");
+ PR_fprintf(debug_out, "\tThreads involved: %d\n", thread_limit);
+ PR_fprintf(debug_out, "\tIteration limit: %d\n", loop_limit);
+ PR_fprintf(debug_out, "\tConcurrency: %d\n", concurrency);
+ PR_fprintf(
+ debug_out, "\tThread type: %s\n",
+ (PR_GLOBAL_THREAD == thread_scope) ? "GLOBAL" : "LOCAL");
+ }
+
+ /*
+ ** The interesting part starts here
+ */
+ RCLock lock;
+ Shared* shared;
+ Home home(NULL, &lock);
+ Home* link = &home;
+ RCInterval timein, timeout = 0;
+
+ /* Build up the string of objects */
+ for (thread_count = 1; thread_count <= thread_limit; ++thread_count)
+ {
+ shared = new Shared(thread_scope, link, &lock);
+ shared->Start(); /* make it run */
+ link = (Home*)shared;
+ }
+
+ /* Pass the message around the horn a few times */
+ for (loop_count = 1; loop_count <= loop_limit; ++loop_count)
+ {
+ timein.SetToNow();
+ for (inner_count = 0; inner_count < INNER_LOOPS; ++inner_count)
+ {
+ RCEnter entry(&lock);
+ home.twiddle = PR_TRUE;
+ shared->twiddle = PR_FALSE;
+ shared->Notify();
+ while (home.twiddle)
+ {
+ failed = (PR_FAILURE == home.Wait()) ? PR_TRUE : PR_FALSE;
+ }
+ }
+ timeout += (RCInterval(RCInterval::now) - timein);
+ }
+
+ /* Figure out how well we did */
+ if (debug_mode)
+ {
+ average = timeout.ToMicroseconds()
+ / (INNER_LOOPS * loop_limit * thread_count);
+ PR_fprintf(
+ debug_out, "Average switch times %d usecs for %d threads\n",
+ average, thread_limit);
+ }
+
+ /* Start reclamation process */
+ link = shared;
+ for (thread_count = 1; thread_count <= thread_limit; ++thread_count)
+ {
+ if (&home == link) break;
+ status = ((Shared*)link)->Interrupt();
+ if (PR_SUCCESS != status)
+ {
+ failed = PR_TRUE;
+ if (debug_mode)
+ PL_FPrintError(debug_out, "Failed to interrupt");
+ }
+ link = link->next;
+ }
+
+ for (thread_count = 1; thread_count <= thread_limit; ++thread_count)
+ {
+ link = shared->next;
+ status = shared->Join();
+ if (PR_SUCCESS != status)
+ {
+ failed = PR_TRUE;
+ if (debug_mode)
+ PL_FPrintError(debug_out, "Failed to join");
+ }
+ if (&home == link) break;
+ shared = (Shared*)link;
+ }
+
+ PR_fprintf(PR_STDOUT, ((failed) ? "FAILED\n" : "PASSED\n"));
+
+ failed |= (PR_SUCCESS == RCPrimordialThread::Cleanup());
+
+ return ((failed) ? 1 : 0);
+} /* main */
+
+/* switch.c */
View Lorry Controller Status