summaryrefslogtreecommitdiffstats
path: root/nsprpub/pr/tests/perf.c
diff options
context:
space:
mode:
Diffstat (limited to 'nsprpub/pr/tests/perf.c')
-rw-r--r--nsprpub/pr/tests/perf.c447
1 files changed, 447 insertions, 0 deletions
diff --git a/nsprpub/pr/tests/perf.c b/nsprpub/pr/tests/perf.c
new file mode 100644
index 0000000000..cd8ac1439b
--- /dev/null
+++ b/nsprpub/pr/tests/perf.c
@@ -0,0 +1,447 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "nspr.h"
+#include "plgetopt.h"
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+int _debug_on = 0;
+#define DPRINTF(arg) if (_debug_on) printf arg
+
+#include "obsolete/prsem.h"
+
+PRLock *lock;
+PRMonitor *mon;
+PRMonitor *mon2;
+
+#define DEFAULT_COUNT 1000
+
+PRInt32 count;
+
+static void nop(int a, int b, int c)
+{
+}
+
+static void LocalProcedureCall(void)
+{
+ PRInt32 i;
+
+ for (i = 0; i < count; i++) {
+ nop(i, i, 5);
+ }
+}
+
+static void DLLProcedureCall(void)
+{
+ PRInt32 i;
+ PRThreadState state;
+ PRThread *self = PR_GetCurrentThread();
+
+ for (i = 0; i < count; i++) {
+ state = PR_GetThreadState(self);
+ }
+}
+
+static void Now(void)
+{
+ PRInt32 i;
+ PRTime time;
+
+ for (i = 0; i < count; i++) {
+ time = PR_Now();
+ }
+}
+
+static void Interval(void)
+{
+ PRInt32 i;
+ PRIntervalTime time;
+
+ for (i = 0; i < count; i++) {
+ time = PR_IntervalNow();
+ }
+}
+
+static void IdleLock(void)
+{
+ PRInt32 i;
+
+ for (i = 0; i < count; i++) {
+ PR_Lock(lock);
+ PR_Unlock(lock);
+ }
+}
+
+static void IdleMonitor(void)
+{
+ PRInt32 i;
+
+ for (i = 0; i < count; i++) {
+ PR_EnterMonitor(mon);
+ PR_ExitMonitor(mon);
+ }
+}
+
+static void IdleCMonitor(void)
+{
+ PRInt32 i;
+
+ for (i = 0; i < count; i++) {
+ PR_CEnterMonitor((void*)7);
+ PR_CExitMonitor((void*)7);
+ }
+}
+
+/************************************************************************/
+
+static void PR_CALLBACK dull(void *arg)
+{
+}
+
+static void CDThread(void)
+{
+ PRInt32 i;
+ int num_threads = count;
+
+ /*
+ * Cannot create too many threads
+ */
+ if (num_threads > 1000) {
+ num_threads = 1000;
+ }
+
+ for (i = 0; i < num_threads; i++) {
+ PRThread *t = PR_CreateThread(PR_USER_THREAD,
+ dull, 0,
+ PR_PRIORITY_NORMAL,
+ PR_LOCAL_THREAD,
+ PR_UNJOINABLE_THREAD,
+ 0);
+ if (NULL == t) {
+ fprintf(stderr, "CDThread: cannot create thread %3d\n", i);
+ } else {
+ DPRINTF(("CDThread: created thread %3d \n",i));
+ }
+ PR_Sleep(0);
+ }
+}
+
+static int alive;
+static int cxq;
+
+static void PR_CALLBACK CXReader(void *arg)
+{
+ PRInt32 i, n;
+
+ PR_EnterMonitor(mon);
+ n = count / 2;
+ for (i = 0; i < n; i++) {
+ while (cxq == 0) {
+ DPRINTF(("CXReader: thread = 0x%lx waiting\n",
+ PR_GetCurrentThread()));
+ PR_Wait(mon, PR_INTERVAL_NO_TIMEOUT);
+ }
+ --cxq;
+ PR_Notify(mon);
+ }
+ PR_ExitMonitor(mon);
+
+ PR_EnterMonitor(mon2);
+ --alive;
+ PR_Notify(mon2);
+ PR_ExitMonitor(mon2);
+ DPRINTF(("CXReader: thread = 0x%lx exiting\n", PR_GetCurrentThread()));
+}
+
+static void PR_CALLBACK CXWriter(void *arg)
+{
+ PRInt32 i, n;
+
+ PR_EnterMonitor(mon);
+ n = count / 2;
+ for (i = 0; i < n; i++) {
+ while (cxq == 1) {
+ DPRINTF(("CXWriter: thread = 0x%lx waiting\n",
+ PR_GetCurrentThread()));
+ PR_Wait(mon, PR_INTERVAL_NO_TIMEOUT);
+ }
+ ++cxq;
+ PR_Notify(mon);
+ }
+ PR_ExitMonitor(mon);
+
+ PR_EnterMonitor(mon2);
+ --alive;
+ PR_Notify(mon2);
+ PR_ExitMonitor(mon2);
+ DPRINTF(("CXWriter: thread = 0x%lx exiting\n", PR_GetCurrentThread()));
+}
+
+static void ContextSwitch(PRThreadScope scope1, PRThreadScope scope2)
+{
+ PRThread *t1, *t2;
+
+ PR_EnterMonitor(mon2);
+ alive = 2;
+ cxq = 0;
+
+ t1 = PR_CreateThread(PR_USER_THREAD,
+ CXReader, 0,
+ PR_PRIORITY_NORMAL,
+ scope1,
+ PR_UNJOINABLE_THREAD,
+ 0);
+ if (NULL == t1) {
+ fprintf(stderr, "ContextSwitch: cannot create thread\n");
+ } else {
+ DPRINTF(("ContextSwitch: created %s thread = 0x%lx\n",
+ (scope1 == PR_GLOBAL_THREAD ?
+ "PR_GLOBAL_THREAD" : "PR_LOCAL_THREAD"),
+ t1));
+ }
+ t2 = PR_CreateThread(PR_USER_THREAD,
+ CXWriter, 0,
+ PR_PRIORITY_NORMAL,
+ scope2,
+ PR_UNJOINABLE_THREAD,
+ 0);
+ if (NULL == t2) {
+ fprintf(stderr, "ContextSwitch: cannot create thread\n");
+ } else {
+ DPRINTF(("ContextSwitch: created %s thread = 0x%lx\n",
+ (scope2 == PR_GLOBAL_THREAD ?
+ "PR_GLOBAL_THREAD" : "PR_LOCAL_THREAD"),
+ t2));
+ }
+
+ /* Wait for both of the threads to exit */
+ while (alive) {
+ PR_Wait(mon2, PR_INTERVAL_NO_TIMEOUT);
+ }
+ PR_ExitMonitor(mon2);
+}
+
+static void ContextSwitchUU(void)
+{
+ ContextSwitch(PR_LOCAL_THREAD, PR_LOCAL_THREAD);
+}
+
+static void ContextSwitchUK(void)
+{
+ ContextSwitch(PR_LOCAL_THREAD, PR_GLOBAL_THREAD);
+}
+
+static void ContextSwitchKU(void)
+{
+ ContextSwitch(PR_GLOBAL_THREAD, PR_LOCAL_THREAD);
+}
+
+static void ContextSwitchKK(void)
+{
+ ContextSwitch(PR_GLOBAL_THREAD, PR_GLOBAL_THREAD);
+}
+
+/************************************************************************/
+
+static void PR_CALLBACK SemaThread(void *argSema)
+{
+ PRSemaphore **sem = (PRSemaphore **)argSema;
+ PRInt32 i, n;
+
+ n = count / 2;
+ for (i = 0; i < n; i++) {
+ DPRINTF(("SemaThread: thread = 0x%lx waiting on sem = 0x%lx\n",
+ PR_GetCurrentThread(), sem[0]));
+ PR_WaitSem(sem[0]);
+ DPRINTF(("SemaThread: thread = 0x%lx posting on sem = 0x%lx\n",
+ PR_GetCurrentThread(), sem[1]));
+ PR_PostSem(sem[1]);
+ }
+
+ PR_EnterMonitor(mon2);
+ --alive;
+ PR_Notify(mon2);
+ PR_ExitMonitor(mon2);
+ DPRINTF(("SemaThread: thread = 0x%lx exiting\n", PR_GetCurrentThread()));
+}
+
+static PRSemaphore *sem_set1[2];
+static PRSemaphore *sem_set2[2];
+
+static void SemaContextSwitch(PRThreadScope scope1, PRThreadScope scope2)
+{
+ PRThread *t1, *t2;
+ sem_set1[0] = PR_NewSem(1);
+ sem_set1[1] = PR_NewSem(0);
+ sem_set2[0] = sem_set1[1];
+ sem_set2[1] = sem_set1[0];
+
+ PR_EnterMonitor(mon2);
+ alive = 2;
+ cxq = 0;
+
+ t1 = PR_CreateThread(PR_USER_THREAD,
+ SemaThread,
+ sem_set1,
+ PR_PRIORITY_NORMAL,
+ scope1,
+ PR_UNJOINABLE_THREAD,
+ 0);
+ if (NULL == t1) {
+ fprintf(stderr, "SemaContextSwitch: cannot create thread\n");
+ } else {
+ DPRINTF(("SemaContextSwitch: created %s thread = 0x%lx\n",
+ (scope1 == PR_GLOBAL_THREAD ?
+ "PR_GLOBAL_THREAD" : "PR_LOCAL_THREAD"),
+ t1));
+ }
+ t2 = PR_CreateThread(PR_USER_THREAD,
+ SemaThread,
+ sem_set2,
+ PR_PRIORITY_NORMAL,
+ scope2,
+ PR_UNJOINABLE_THREAD,
+ 0);
+ if (NULL == t2) {
+ fprintf(stderr, "SemaContextSwitch: cannot create thread\n");
+ } else {
+ DPRINTF(("SemaContextSwitch: created %s thread = 0x%lx\n",
+ (scope2 == PR_GLOBAL_THREAD ?
+ "PR_GLOBAL_THREAD" : "PR_LOCAL_THREAD"),
+ t2));
+ }
+
+ /* Wait for both of the threads to exit */
+ while (alive) {
+ PR_Wait(mon2, PR_INTERVAL_NO_TIMEOUT);
+ }
+ PR_ExitMonitor(mon2);
+
+ PR_DestroySem(sem_set1[0]);
+ PR_DestroySem(sem_set1[1]);
+}
+
+static void SemaContextSwitchUU(void)
+{
+ SemaContextSwitch(PR_LOCAL_THREAD, PR_LOCAL_THREAD);
+}
+
+static void SemaContextSwitchUK(void)
+{
+ SemaContextSwitch(PR_LOCAL_THREAD, PR_GLOBAL_THREAD);
+}
+
+static void SemaContextSwitchKU(void)
+{
+ SemaContextSwitch(PR_GLOBAL_THREAD, PR_LOCAL_THREAD);
+}
+
+static void SemaContextSwitchKK(void)
+{
+ SemaContextSwitch(PR_GLOBAL_THREAD, PR_GLOBAL_THREAD);
+}
+
+
+/************************************************************************/
+
+static void Measure(void (*func)(void), const char *msg)
+{
+ PRIntervalTime start, stop;
+ double d;
+
+ start = PR_IntervalNow();
+ (*func)();
+ stop = PR_IntervalNow() - start;
+ d = (double)PR_IntervalToMicroseconds(stop);
+
+ printf("%40s: %6.2f usec\n", msg, d / count);
+}
+
+int main(int argc, char **argv)
+{
+ PLOptStatus os;
+ PLOptState *opt = PL_CreateOptState(argc, argv, "dc:");
+ while (PL_OPT_EOL != (os = PL_GetNextOpt(opt)))
+ {
+ if (PL_OPT_BAD == os) {
+ continue;
+ }
+ switch (opt->option)
+ {
+ case 'd': /* debug mode */
+ _debug_on = 1;
+ break;
+ case 'c': /* loop count */
+ count = atoi(opt->value);
+ break;
+ default:
+ break;
+ }
+ }
+ PL_DestroyOptState(opt);
+
+ if (0 == count) {
+ count = DEFAULT_COUNT;
+ }
+
+ PR_Init(PR_USER_THREAD, PR_PRIORITY_NORMAL, 0);
+ PR_BlockClockInterrupts();
+ PR_UnblockClockInterrupts();
+ PR_STDIO_INIT();
+
+ lock = PR_NewLock();
+ mon = PR_NewMonitor();
+ mon2 = PR_NewMonitor();
+
+ Measure(LocalProcedureCall, "local procedure call overhead");
+ Measure(DLLProcedureCall, "DLL procedure call overhead");
+ Measure(Now, "current calendar time");
+ Measure(Interval, "interval time");
+ Measure(IdleLock, "idle lock lock/unlock pair");
+ Measure(IdleMonitor, "idle monitor entry/exit pair");
+ Measure(IdleCMonitor, "idle cache monitor entry/exit pair");
+ Measure(CDThread, "create/destroy thread pair");
+ Measure(ContextSwitchUU, "context switch - user/user");
+ Measure(ContextSwitchUK, "context switch - user/kernel");
+ Measure(ContextSwitchKU, "context switch - kernel/user");
+ Measure(ContextSwitchKK, "context switch - kernel/kernel");
+ Measure(SemaContextSwitchUU, "sema context switch - user/user");
+ Measure(SemaContextSwitchUK, "sema context switch - user/kernel");
+ Measure(SemaContextSwitchKU, "sema context switch - kernel/user");
+ Measure(SemaContextSwitchKK, "sema context switch - kernel/kernel");
+
+ printf("--------------\n");
+ printf("Adding 7 additional CPUs\n");
+
+ PR_SetConcurrency(8);
+ printf("--------------\n");
+
+ Measure(LocalProcedureCall, "local procedure call overhead");
+ Measure(DLLProcedureCall, "DLL procedure call overhead");
+ Measure(Now, "current calendar time");
+ Measure(Interval, "interval time");
+ Measure(IdleLock, "idle lock lock/unlock pair");
+ Measure(IdleMonitor, "idle monitor entry/exit pair");
+ Measure(IdleCMonitor, "idle cache monitor entry/exit pair");
+ Measure(CDThread, "create/destroy thread pair");
+ Measure(ContextSwitchUU, "context switch - user/user");
+ Measure(ContextSwitchUK, "context switch - user/kernel");
+ Measure(ContextSwitchKU, "context switch - kernel/user");
+ Measure(ContextSwitchKK, "context switch - kernel/kernel");
+ Measure(SemaContextSwitchUU, "sema context switch - user/user");
+ Measure(SemaContextSwitchUK, "sema context switch - user/kernel");
+ Measure(SemaContextSwitchKU, "sema context switch - kernel/user");
+ Measure(SemaContextSwitchKK, "sema context switch - kernel/kernel");
+
+ PR_DestroyLock(lock);
+ PR_DestroyMonitor(mon);
+ PR_DestroyMonitor(mon2);
+
+ PR_Cleanup();
+ return 0;
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-20 16:00:36 +0000