Date: Tue, 10 Dec 1996 13:53:25 +0800 From: alexj@motaba.tmc.edu.tw To: freebsd-current@freebsd.org Subject: Amazing to MIT Pthread-1.60b6 & Pthread built in FreeBSD-2.2-ALPHA Message-ID: <3.0.32.19961210135325.00de1af0@mail.tmc.edu.tw>
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It surprised me so much !!
I wrote a small program to test the performance of MIT PThread-1.60b6 (MIT) used in FreeBSD-2.2-ALPHA & the pthread built in FBSD-2.2-ALPHA (FBSD).
I had thought that the performance of FBSD should be better than that of
MIT. However, I am wrong after making this test.
It's really amazing. The performance of MIT is much better than that
of FBSD.
Is there any problem in FreeBSD-2.2-ALPHA ?
gcc pbench.c -lc_r
================================================================
FreeBSD 2.2-ALPHA built-in PTHREAD test....
Testing pthread_create() 1000 times...spending 3.228051 seconds
Testing pthread_lock() 10000 times...spending 0.97357 seconds
Testing pthread_yield() 10000 times...spending 12.1259162 seconds
================================================================
pgcc pbench.c
================================================================
MIT PTHREAD 1.60B6 performance test....
Testing pthread_create() 100000 times...spending 0.1063555 seconds
Testing pthread_lock() 1000000 times...spending 1.168608 seconds
Testing pthread_yield() 1000000 times...spending 9.333843 seconds
==================================================================
The attachment is my program source code
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#include <pthread.h>
#include <stdio.h>
struct timeval tv1, tv2;
long testTimes=100;
void create_thread_test()
{
pthread_exit(0);
}
void test_pthread_create()
{
int count;
long d_sec, d_usec, tt;
pthread_t p_t;
tt = testTimes / 10;
printf("Testing pthread_create() %i times...", tt);
gettimeofday(&tv1, NULL);
for(count=0; count < tt; count++) {
pthread_create(&p_t, NULL, (void*) &create_thread_test, NULL);
}
gettimeofday(&tv2, NULL);
d_usec = tv2.tv_usec-tv1.tv_usec;
d_sec = tv2.tv_sec-tv1.tv_sec;
if (d_usec < 0) {
d_usec = 1000000- d_usec;
d_sec--;
}
printf("spending %i.%i seconds\n",d_sec,d_usec);
}
void test_pthread_lock()
{
int count;
long d_sec, d_usec;
pthread_mutex_t lock;
printf("Testing pthread_lock() %i times...", testTimes);
pthread_mutex_init(&lock, NULL);
gettimeofday(&tv1, NULL);
for(count=0; count < testTimes; count++) {
pthread_mutex_lock(&lock);
pthread_mutex_unlock(&lock);
}
gettimeofday(&tv2, NULL);
d_usec = tv2.tv_usec-tv1.tv_usec;
d_sec = tv2.tv_sec-tv1.tv_sec;
if (d_usec < 0) {
d_usec = 1000000- d_usec;
d_sec--;
}
printf("spending %i.%i seconds\n",d_sec,d_usec);
}
void test_pthread_yield()
{
int count;
long d_sec, d_usec;
printf("Testing pthread_yield() %i times...", testTimes);
gettimeofday(&tv1, NULL);
for(count=0; count < testTimes; count++) {
pthread_yield();
}
gettimeofday(&tv2, NULL);
d_usec = tv2.tv_usec-tv1.tv_usec;
d_sec = tv2.tv_sec-tv1.tv_sec;
if (d_usec < 0) {
d_usec = 1000000- d_usec;
d_sec--;
}
printf("spending %i.%i seconds\n",d_sec,d_usec);
}
//================================================================
main(argc, argv)
int argc;
char *argv[];
{
int i;
pthread_init();
printf("argc=%i\n", argc);
for (i=0; i < argc; i++) {
printf("argv[%i]=%s\n", i, argv[i]);
}
if (argc >=2) {
testTimes = atoi(argv[1]);
}
//#define MIT
#ifdef MIT
printf("MIT PTHREAD 1.60B6 performance test....\n");
#else
printf("FreeBSD 2.2-ALPHA built-in PTHREAD test....\n");
#endif
test_pthread_create();
test_pthread_lock();
test_pthread_yield();
}
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========================================================
= Reading this letter thorugh
<bold><color><param>ffff,0000,0000</param><bigger><bigger>E</bigger></bigger>u<bigger>d</bigger>ora
<bigger><bigger>P</bigger></bigger>ro
<bigger><bigger>3</bigger></bigger></color></bold>, =
= You will find that the world of e-mail can also be
<color><param>ffff,0000,ffff</param>co</color><color><param>0000,0000,ffff</param>lo</color><color><param>0000,ffff,ffff</param>rf</color><color><param>0000,ffff,0000</param>ul</color> =
========================================================
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