Hi,
We have the following two servers both are running Solaris 10:
V245 - Solaris 10, 8G memory, 8G swap, patch level 118833-24, 2 cpu operate at
1504 MHz each
T5120 (guest ldom) - Solaris 10, 2G memory, 1G swap, patch level 137111-05, 4
cpu operate at 1165 MHz each
We tested with the following code and the results are very different. We even
tested with the whole box (T5120) with 32G memory and 64 CPUs and results are
same. Not sure why T5120 is slower than V245.
Are they any settings that we can change in T5120 or ldoms?
Thanks!
// Compile using the following command
//
// gcc -O2 -lpthread performance.c
#include <time.h>
#include <stdio.h>
#include <stdlib.h>
#include <pthread.h>
#define MS_TO_SEC 0.000001 /1/1000000/
double CurrSysTime()
{
struct timeval tv;
double currTime = -1;
if(gettimeofday(&tv, NULL)<0)
{
return currTime;
}
currTime = tv.tv_sec tv.tv_usec*MS_TO_SEC;
return(currTime);
}
double GetCurTime() {
struct timeval tv;
gettimeofday(&tv, NULL);
return (tv.tv_sec*1000000.0 tv.tv_usec);
}
pthread_t t1 = 0;
pthread_t t2 = 0;
pthread_t t3 = 0;
pthread_t t4 = 0;
pthread_t t5 = 0;
pthread_t t6 = 0;
pthread_t t7 = 0;
pthread_t t8 = 0;
pthread_t t9 = 0;
pthread_t t10 = 0;
#define LOOP 1000000
// Ten of these threads are started
void *testThread()
{
int i,j;
int num;
double startTime;
double endTime;
startTime = GetCurTime();
for(i =0; i < LOOP; ++i)
{
}
endTime = GetCurTime();
printf("(Thread %d)Elapsed time to loop %d times: %f (MS)\n",pthread_self(),
LOOP, endTime-startTime);
}
// Main Program
main()
{
// Start up the test threads
pthread_create(&t1, NULL, testThread, NULL);
pthread_create(&t2, NULL, testThread, NULL);
pthread_create(&t3, NULL, testThread, NULL);
pthread_create(&t4, NULL, testThread, NULL);
pthread_create(&t5, NULL, testThread, NULL);
pthread_create(&t6, NULL, testThread, NULL);
pthread_create(&t7, NULL, testThread, NULL);
pthread_create(&t8, NULL, testThread, NULL);
pthread_create(&t9, NULL, testThread, NULL);
pthread_create(&t10, NULL, testThread, NULL);
// Wait for the threads to finish
sleep(10);
}
Results are:
T5120
(Thread 2)Elapsed time to loop 1000000 times: 6768.000000 (MS)
(Thread 5)Elapsed time to loop 1000000 times: 6819.000000 (MS)
(Thread 6)Elapsed time to loop 1000000 times: 6823.000000 (MS)
(Thread 7)Elapsed time to loop 1000000 times: 6824.000000 (MS)
(Thread 4)Elapsed time to loop 1000000 times: 6773.000000 (MS)
(Thread 8)Elapsed time to loop 1000000 times: 6917.000000 (MS)
(Thread 3)Elapsed time to loop 1000000 times: 6771.000000 (MS)
(Thread 9)Elapsed time to loop 1000000 times: 6841.000000 (MS)
(Thread 11)Elapsed time to loop 1000000 times: 6197.000000 (MS)
(Thread 10)Elapsed time to loop 1000000 times: 6381.000000 (MS)
V245
(Thread 2)Elapsed time to loop 1000000 times: 1998.000000 (MS)
(Thread 3)Elapsed time to loop 1000000 times: 1998.000000 (MS)
(Thread 6)Elapsed time to loop 1000000 times: 2041.000000 (MS)
(Thread 4)Elapsed time to loop 1000000 times: 2080.000000 (MS)
(Thread 8)Elapsed time to loop 1000000 times: 1995.000000 (MS)
(Thread 5)Elapsed time to loop 1000000 times: 1996.000000 (MS)
(Thread 10)Elapsed time to loop 1000000 times: 2024.000000 (MS)
(Thread 7)Elapsed time to loop 1000000 times: 1996.000000 (MS)
(Thread 9)Elapsed time to loop 1000000 times: 1995.000000 (MS)
(Thread 11)Elapsed time to loop 1000000 times: 1996.000000 (MS)
--
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