ClickHouse/utils/iotest/iotest.cpp

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#include <IO/BufferWithOwnMemory.h>
#include <IO/ReadHelpers.h>
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#include <pcg_random.hpp>
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#include <Poco/Exception.h>
#include <Common/Exception.h>
#include <Common/Stopwatch.h>
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#include <Common/ThreadPool.h>
#include <Common/randomSeed.h>
#include <cstdlib>
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#include <iomanip>
#include <iostream>
#include <random>
#include <vector>
#include <fcntl.h>
#include <stdlib.h>
#include <time.h>
#include <unistd.h>
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namespace DB
{
namespace ErrorCodes
{
extern const int CANNOT_OPEN_FILE;
extern const int CANNOT_CLOSE_FILE;
extern const int CANNOT_READ_FROM_FILE_DESCRIPTOR;
extern const int CANNOT_WRITE_TO_FILE_DESCRIPTOR;
}
}
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enum Mode
{
MODE_NONE = 0,
MODE_READ = 1,
MODE_WRITE = 2,
MODE_ALIGNED = 4,
MODE_DIRECT = 8,
MODE_SYNC = 16,
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};
void thread(int fd, int mode, size_t min_offset, size_t max_offset, size_t block_size, size_t count)
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{
using namespace DB;
Memory<> direct_buf(block_size, sysconf(_SC_PAGESIZE));
std::vector<char> simple_buf(block_size);
char * buf;
if ((mode & MODE_DIRECT))
buf = direct_buf.data();
else
buf = &simple_buf[0];
pcg64 rng(randomSeed());
for (size_t i = 0; i < count; ++i)
{
long rand_result1 = rng();
long rand_result2 = rng();
long rand_result3 = rng();
size_t rand_result = rand_result1 ^ (rand_result2 << 22) ^ (rand_result3 << 43);
size_t offset;
if ((mode & MODE_DIRECT) || (mode & MODE_ALIGNED))
offset = min_offset + rand_result % ((max_offset - min_offset) / block_size) * block_size;
else
offset = min_offset + rand_result % (max_offset - min_offset - block_size + 1);
if (mode & MODE_READ)
{
if (static_cast<int>(block_size) != pread(fd, buf, block_size, offset))
throwFromErrno("Cannot read", ErrorCodes::CANNOT_READ_FROM_FILE_DESCRIPTOR);
}
else
{
if (static_cast<int>(block_size) != pwrite(fd, buf, block_size, offset))
throwFromErrno("Cannot write", ErrorCodes::CANNOT_WRITE_TO_FILE_DESCRIPTOR);
}
}
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}
int mainImpl(int argc, char ** argv)
{
using namespace DB;
const char * file_name = 0;
int mode = MODE_NONE;
UInt64 min_offset = 0;
UInt64 max_offset = 0;
UInt64 block_size = 0;
UInt64 threads = 0;
UInt64 count = 0;
if (argc != 8)
{
std::cerr << "Usage: " << argv[0] << " file_name (r|w)[a][d][s] min_offset max_offset block_size threads count" << std::endl <<
"a - aligned, d - direct, s - sync" << std::endl;
return 1;
}
file_name = argv[1];
min_offset = parse<UInt64>(argv[3]);
max_offset = parse<UInt64>(argv[4]);
block_size = parse<UInt64>(argv[5]);
threads = parse<UInt64>(argv[6]);
count = parse<UInt64>(argv[7]);
for (int i = 0; argv[2][i]; ++i)
{
char c = argv[2][i];
switch(c)
{
case 'r':
mode |= MODE_READ;
break;
case 'w':
mode |= MODE_WRITE;
break;
case 'a':
mode |= MODE_ALIGNED;
break;
case 'd':
mode |= MODE_DIRECT;
break;
case 's':
mode |= MODE_SYNC;
break;
default:
throw Poco::Exception("Invalid mode");
}
}
ThreadPool pool(threads);
#ifndef __APPLE__
int fd = open(file_name, ((mode & MODE_READ) ? O_RDONLY : O_WRONLY) | ((mode & MODE_DIRECT) ? O_DIRECT : 0) | ((mode & MODE_SYNC) ? O_SYNC : 0));
#else
int fd = open(file_name, ((mode & MODE_READ) ? O_RDONLY : O_WRONLY) | ((mode & MODE_SYNC) ? O_SYNC : 0));
#endif
if (-1 == fd)
throwFromErrno("Cannot open file", ErrorCodes::CANNOT_OPEN_FILE);
#ifdef __APPLE__
if (mode & MODE_DIRECT)
if (fcntl(fd, F_NOCACHE, 1) == -1)
throwFromErrno("Cannot open file", ErrorCodes::CANNOT_CLOSE_FILE);
#endif
Stopwatch watch;
for (size_t i = 0; i < threads; ++i)
pool.scheduleOrThrowOnError(std::bind(thread, fd, mode, min_offset, max_offset, block_size, count));
pool.wait();
fsync(fd);
watch.stop();
if (0 != close(fd))
throwFromErrno("Cannot close file", ErrorCodes::CANNOT_CLOSE_FILE);
std::cout << std::fixed << std::setprecision(2)
<< "Done " << count << " * " << threads << " ops";
if (mode & MODE_ALIGNED)
std::cout << " (aligned)";
if (mode & MODE_DIRECT)
std::cout << " (direct)";
if (mode & MODE_SYNC)
std::cout << " (sync)";
std::cout << " in " << watch.elapsedSeconds() << " sec."
<< ", " << count * threads / watch.elapsedSeconds() << " ops/sec."
<< ", " << count * threads * block_size / watch.elapsedSeconds() / 1000000 << " MB/sec."
<< std::endl;
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return 0;
}
int main(int argc, char ** argv)
{
try
{
return mainImpl(argc, argv);
}
catch (const Poco::Exception & e)
{
std::cerr << e.what() << ", " << e.message() << std::endl;
return 1;
}
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}