ClickHouse/utils/iotest/iotest.cpp

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#include <fcntl.h>
#include <unistd.h>
#include <stdlib.h>
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#include <time.h>
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#include <iostream>
#include <iomanip>
#include <vector>
#include <Poco/NumberParser.h>
#include <Poco/NumberFormatter.h>
#include <Poco/Exception.h>
#include <Poco/SharedPtr.h>
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#include <DB/Core/Exception.h>
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#include <statdaemons/threadpool.hpp>
#include <statdaemons/Stopwatch.h>
#include <stdlib.h>
#include <malloc.h>
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using DB::throwFromErrno;
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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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};
typedef Poco::SharedPtr<Poco::Exception> ExceptionPtr;
struct AlignedBuffer
{
int size;
char * data;
AlignedBuffer(int size_)
{
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size_t page = sysconf(_SC_PAGESIZE);
size = size_;
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data = static_cast<char*>(memalign(page, (size + page - 1) / page * page));
if (!data)
throwFromErrno("memalign failed");
}
~AlignedBuffer()
{
free(data);
}
};
void thread(int fd, int mode, size_t min_offset, size_t max_offset, size_t block_size, size_t count, ExceptionPtr & exception)
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{
try
{
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AlignedBuffer direct_buf(block_size);
std::vector<char> simple_buf(block_size);
char * buf;
if ((mode & MODE_DIRECT))
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buf = direct_buf.data;
else
buf = &simple_buf[0];
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drand48_data rand_data;
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timespec times;
clock_gettime(CLOCK_THREAD_CPUTIME_ID, &times);
srand48_r(times.tv_nsec, &rand_data);
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for (size_t i = 0; i < count; ++i)
{
long rand_result1 = 0;
long rand_result2 = 0;
long rand_result3 = 0;
lrand48_r(&rand_data, &rand_result1);
lrand48_r(&rand_data, &rand_result2);
lrand48_r(&rand_data, &rand_result3);
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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);
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if (mode & MODE_READ)
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{
if (static_cast<int>(block_size) != pread(fd, buf, block_size, offset))
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throwFromErrno("Cannot read");
}
else
{
if (static_cast<int>(block_size) != pwrite(fd, buf, block_size, offset))
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throwFromErrno("Cannot write");
}
}
}
catch (const Poco::Exception & e)
{
exception = e.clone();
}
catch (...)
{
exception = new Poco::Exception("Unknown exception");
}
}
int mainImpl(int argc, char ** argv)
{
const char * file_name = 0;
int mode = MODE_NONE;
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size_t min_offset = 0;
size_t max_offset = 0;
size_t block_size = 0;
size_t threads = 0;
size_t 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;
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return 1;
}
file_name = argv[1];
min_offset = Poco::NumberParser::parseUnsigned64(argv[3]);
max_offset = Poco::NumberParser::parseUnsigned64(argv[4]);
block_size = Poco::NumberParser::parseUnsigned64(argv[5]);
threads = Poco::NumberParser::parseUnsigned(argv[6]);
count = Poco::NumberParser::parseUnsigned(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");
}
}
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boost::threadpool::pool pool(threads);
int fd = open(file_name, ((mode & MODE_READ) ? O_RDONLY : O_WRONLY) | ((mode & MODE_DIRECT) ? O_DIRECT : 0) | ((mode & MODE_SYNC) ? O_SYNC : 0));
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if (-1 == fd)
throwFromErrno("Cannot open file");
typedef std::vector<ExceptionPtr> Exceptions;
Exceptions exceptions(threads);
Stopwatch watch;
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for (size_t i = 0; i < threads; ++i)
pool.schedule(std::bind(thread, fd, mode, min_offset, max_offset, block_size, count, std::ref(exceptions[i])));
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pool.wait();
fsync(fd);
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for (size_t i = 0; i < threads; ++i)
if (exceptions[i])
exceptions[i]->rethrow();
watch.stop();
if (0 != close(fd))
throwFromErrno("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."
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<< ", " << 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;
}
}