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/* Copyright (c) 2003-2005 MySQL AB
Use is subject to license terms
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; version 2 of the License.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA */
#include <ndb_global.h>
#include <NdbOut.hpp>
#include <NdbThread.h>
#include <NdbMutex.h>
#include <NdbCondition.h>
#include <NdbSleep.h>
#include <NdbTick.h>
#include <NdbEnv.h>
#include <NdbHost.h>
#include <NdbMain.h>
#include <getarg.h>
struct ThreadData
{
char * mapAddr;
Uint32 mapSize;
Uint32 chunk;
Uint32 idx;
};
long long getMilli();
long long getMicro();
void* mapSegment(void * arg);
void* unmapSegment(void * arg);
void* mapSegment(void * arg) {
ThreadData * threadArgs;
long long start=0;
int total=0;
int id = *(int *)arg;
threadArgs = new ThreadData [1];
Uint32 size=5*1024*1024;
struct NdbThread* unmapthread_var;
void *status = 0;
int run = 1;
int max=0, min =100000000, sum=0;
while(run < 1001) {
start=getMicro();
char * ptr =(char*) mmap(0,
size,
PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_ANONYMOUS,
0,
0);
total=(int)(getMicro()-start);
ndbout << "T" << id << ": mmap took : " << total << " microsecs. "
<< " Run: " << run ;
ndbout_c(" mapped @ %p \n", ptr);
if(total>max)
max = total;
if(total<min)
min=total;
sum+=total;
if(ptr<0) {
ndbout << "failed to mmap!" << endl;
exit(1);
}
threadArgs[0].mapAddr = (char *)ptr;
threadArgs[0].mapSize = size;
threadArgs[0].chunk = 4096;
threadArgs[0].idx = 0;
for(Uint32 j=0; j<size; j=j+4096)
ptr[j]='1';
unmapthread_var = NdbThread_Create(unmapSegment, // Function
(void**)&threadArgs[0],// Arg
32768, // Stacksize
(char*)"unmapthread", // Thread name
NDB_THREAD_PRIO_MEAN); // Thread prio
if(NdbThread_WaitFor(unmapthread_var, &status) != 0) {
ndbout << "test failed - exitting " << endl;
exit(1);
}
run++;
}
ndbout << "MAX: " << max << " MIN: " << min;
float mean = (float) ((float)sum/(float)run);
ndbout_c(" AVERAGE: %2.5f\n",mean);
}
void* unmapSegment(void * arg)
{
char * freeAddr;
char * mapAddr;
ThreadData * threadData = (ThreadData*) arg;
int start=0;
int total=0;
Uint32 mapSize = threadData->mapSize;
Uint32 chunk = threadData->chunk;
mapAddr = threadData->mapAddr;
freeAddr = mapAddr+mapSize-chunk;
NdbSleep_MilliSleep(100);
for(Uint32 i=0;i<mapSize; i = i+chunk) {
start=getMicro();
if(munmap(freeAddr, chunk) < 0){
ndbout << "munmap failed" << endl;
exit(1);
}
total=(int)(getMicro()-start);
freeAddr = freeAddr - chunk;
NdbSleep_MilliSleep(10);
ndbout << "unmap 4096 bytes : " << total << "microsecs" << endl;
}
return NULL;
}
static int trash;
static int segmentsize=1;
static struct getargs args[] = {
{ "trash", 't', arg_integer, &trash,
"trash the memory before (1 to trash 0 to not trash)", "trash"},
{ "segment", 's', arg_integer, &segmentsize,
"segment size (in MB)", "segment"},
};
static const int num_args = sizeof(args) / sizeof(args[0]);
NDB_MAIN(munmaptest) {
const char *progname = "munmaptest";
int optind = 0;
if(getarg(args, num_args, argc, argv, &optind)) {
arg_printusage(args, num_args, progname, "");
exit(1);
}
int size;
char * ptr;
if(trash) {
for(int i=0; i<100; i++) {
size=1+(int) (10.0*rand()/(RAND_MAX+1.0));
NdbSleep_MilliSleep(10);
ptr =(char*) mmap(0,
size*1024*1024,
PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_ANONYMOUS,
0,
0);
for(int i=0;i<(size*1024*1024); i=i+4096) {
*(ptr+i)='1';
}
NdbSleep_MilliSleep(10);
munmap(ptr,size);
}
}
int noThreads = 1;
struct NdbThread* mapthread_var;
int id[noThreads];
void *status=0;
ThreadData * threadArgs = new ThreadData[noThreads];
for(int i=0; i < noThreads; i++) {
threadArgs[i].mapSize = segmentsize*1024*1024;
threadArgs[i].idx = i;
mapthread_var = NdbThread_Create(mapSegment, // Function
(void**)&threadArgs[i],// Arg
32768, // Stacksize
(char*)"mapthread", // Thread name
NDB_THREAD_PRIO_MEAN); // Thread prio
}
if(NdbThread_WaitFor(mapthread_var, &status) != 0) {
ndbout << "test failed - exitting " << endl;
exit(1);
}
}
long long getMilli() {
struct timeval tick_time;
gettimeofday(&tick_time, 0);
return
((long long)tick_time.tv_sec) * ((long long)1000) +
((long long)tick_time.tv_usec) / ((long long)1000);
}
long long getMicro(){
struct timeval tick_time;
int res = gettimeofday(&tick_time, 0);
long long secs = tick_time.tv_sec;
long long micros = tick_time.tv_usec;
micros = secs*1000000+micros;
return micros;
}
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