// main()
//
int main(int argc, char **argv)
{
uint64_t acc=0;
uint64_t readBlocks=0; // read size ib blocks
uint64_t readSize=0; // read size ib bytes
uint64_t readBufferSz=0;
const uint64_t blockSize=8192;
char* alignedbuff=0;
boost::scoped_array<char> realbuff;
const unsigned pageSize = 4096; //getpagesize();
WriteEngine::FileOp fFileOp;
BRM::OID_t oid;
char fname[256];
struct timespec tm;
struct timespec tm2;
struct timespec tm3;
struct timespec starttm;
struct timespec endtm;
struct timespec tottm;
bool odirect=true;
int fd = 0;
char response='Y';
if (argc <= 1) {
cerr << "usage: testread <oid> <buffer size in blocks>" << endl;
return -1;
}
oid=atoi(argv[1]);
if (oid <=0)
exit(-1);
if (argc >=2) {
readBlocks = atoi(argv[2]);
if (readBlocks <= 0)
readBlocks = 8;
}
if (argc >=4) {
odirect=false;
}
readSize=readBlocks*blockSize;
readBufferSz=readSize+pageSize;
realbuff.reset(new char[readBufferSz]);
if (realbuff.get() == 0) {
cerr << "thr_popper: Can't allocate space for a whole extent in memory" << endl;
return 0;
}
if (fFileOp.getFileName(oid, fname) != WriteEngine::NO_ERROR) {
fname[0]=0;
throw std::runtime_error("fileOp.getFileName failed");
}
else {
cout << "Reading oid: " << oid << " od: " << odirect << " file: " << fname << endl;
}
#if __LP64__
alignedbuff=(char*)((((ptrdiff_t)realbuff.get() >> 12) << 12) + pageSize);
#else
alignedbuff=(char*)(((((ptrdiff_t)realbuff.get() >> 12) << 12) & 0xffffffff) + pageSize);
#endif
erydbassert(((ptrdiff_t)alignedbuff - (ptrdiff_t)realbuff.get()) < (ptrdiff_t)pageSize);
erydbassert(((ptrdiff_t)alignedbuff % pageSize) == 0);
if (odirect)
fd=open(fname, O_RDONLY|O_DIRECT|O_LARGEFILE|O_NOATIME);
else
fd=open(fname, O_RDONLY|O_LARGEFILE|O_NOATIME);
if (fd<0) {
cerr << "Open failed" << endl;
perror("open");
throw runtime_error("Error opening file");
}
while (toupper(response) != 'N') {
uint64_t i=1;
uint64_t rCnt=0;
clock_gettime(CLOCK_REALTIME, &starttm);
while (i!=0) {
//clock_gettime(CLOCK_REALTIME, &tm);
i = pread(fd, alignedbuff, readSize, acc);
//clock_gettime(CLOCK_REALTIME, &tm2);
erydbassert(i==0||i==readSize);
erydbassert(i%pageSize==0);
erydbassert(acc%pageSize==0);
if (i < 0 && errno == EINTR) {
timespec_sub(tm, tm2, tm3);
cout << "* "
<< i << " "
<< right << setw(2) << setfill(' ') << tm3.tv_sec << "."
<< right << setw(9) << setfill('0') << tm3.tv_nsec
<< endl;
continue;
}
else if (i < 0) {
timespec_sub(tm, tm2, tm3);
cout << "* i: "
<< i << " sz: " << readSize << " acc: " << acc
<< right << setw(2) << setfill(' ') << tm3.tv_sec << " "
<< right << tm3.tv_nsec
<< endl;
perror("pread");
//make loop exit
i=0;
}
acc += i;
if (i>0)
rCnt++;
//timespec_sub(tm, tm2, tm3);
//cout
// << i << " "
// << right << setw(2) << setfill(' ') << tm3.tv_sec << " "
// << right << tm3.tv_nsec
// << endl;
} // while(acc...
clock_gettime(CLOCK_REALTIME, &endtm);
timespec_sub(starttm, endtm, tottm);
cout << "Total reads: " << rCnt
<< " sz: " << acc/(1024*1024) << "MB"
<< " tm: " << tottm.tv_sec << "secs "
<< tottm.tv_nsec << "ns"
<< endl;
cout << "Repeat the last scan[Y,N]?" << endl;
cin >> response;
acc=0;
} // while response...
close(fd);
return 0;
} //main
void operator() ()
{
WriteEngine::FileOp fFileOp;
char frealbuff[freadBufferSz];
memset(frealbuff, 0, freadBufferSz);
if (frealbuff==0) {
cerr << "thr_popper: Can't allocate space for a whole extent in memory" << endl;
return;
}
if (fFileOp.getFileName(foid, fname) != WriteEngine::NO_ERROR) {
fname[0]=0;
throw std::runtime_error("fileOp.getFileName failed");
}
else {
cout << "Reading oid: " << foid << " od: " << fodirect << " file: " << fname << endl;
}
#if __LP64__
falignedbuff=(char*)((((ptrdiff_t)frealbuff >> 12) << 12) + fpageSize);
#else
falignedbuff=(char*)(((((ptrdiff_t)frealbuff >> 12) << 12) & 0xffffffff) + fpageSize);
#endif
idbassert(((ptrdiff_t)falignedbuff - (ptrdiff_t)frealbuff) < (ptrdiff_t)fpageSize);
idbassert(((ptrdiff_t)falignedbuff % fpageSize) == 0);
if (fodirect)
fd=open(fname, O_RDONLY|O_DIRECT|O_LARGEFILE|O_NOATIME);
else
fd=open(fname, O_RDONLY|O_LARGEFILE|O_NOATIME);
if (fd<0) {
cerr << "Open failed" << endl;
perror("open");
throw runtime_error("Error opening file");
}
uint64_t i=1;
uint64_t rCnt=0;
clock_gettime(CLOCK_REALTIME, &fstarttm);
while (i>0) {
clock_gettime(CLOCK_REALTIME, &ftm);
i = pread(fd, falignedbuff, freadSize, facc);
clock_gettime(CLOCK_REALTIME, &ftm2);
idbassert(i==0||i==freadSize);
idbassert(i%fpageSize==0);
idbassert(facc%fpageSize==0);
if (i < 0 && errno == EINTR)
{
timespec_sub(ftm, ftm2, ftm3);
cout << "* "
<< i << " "
<< right << setw(2) << setfill(' ') << ftm3.tv_sec << "."
<< right << setw(9) << setfill('0') << ftm3.tv_nsec
<< endl;
continue;
}
else if (i < 0)
{
timespec_sub(ftm, ftm2, ftm3);
cout << "* i: "
<< i << " sz: " << freadSize << " acc: " << facc
<< right << setw(2) << setfill(' ') << ftm3.tv_sec << " "
<< right << ftm3.tv_nsec
<< endl;
perror("pread");
}
facc += i;
if (i>0)
rCnt++;
/**
timespec_sub(ftm, ftm2, ftm3);
cout
<< rCnt << " " << facc/(1024*1024)
<< right << setw(2) << setfill(' ') << ftm3.tv_sec << "."
<< right << ftm3.tv_nsec << " i: " << i/(1024*1024)
<< endl;
**/
} // while(acc...
clock_gettime(CLOCK_REALTIME, &fendtm);
timespec_sub(fstarttm, fendtm, ftottm);
cout << "Total reads: " << rCnt
<< " sz: " << facc/(1024*1024) << "MB"
<< " tm: " << ftottm.tv_sec << "secs "
<< ftottm.tv_nsec << "ns"
<< endl;
facc=0;
close(fd);
} // operator()