diff options
Diffstat (limited to 'nsprpub/pr/tests/perf.c')
| -rw-r--r-- | nsprpub/pr/tests/perf.c | 447 |
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; +} |