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/* | ||
Copyright 2022 The Photon Authors | ||
Licensed under the Apache License, Version 2.0 (the "License"); | ||
you may not use this file except in compliance with the License. | ||
You may obtain a copy of the License at | ||
http://www.apache.org/licenses/LICENSE-2.0 | ||
Unless required by applicable law or agreed to in writing, software | ||
distributed under the License is distributed on an "AS IS" BASIS, | ||
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
See the License for the specific language governing permissions and | ||
limitations under the License. | ||
*/ | ||
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#include <fcntl.h> | ||
#include <sys/statfs.h> | ||
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#include <vector> | ||
#include <random> | ||
#include <gflags/gflags.h> | ||
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#include <photon/photon.h> | ||
#include <photon/common/alog.h> | ||
#include <photon/common/io-alloc.h> | ||
#include <photon/fs/localfs.h> | ||
#include <photon/thread/thread11.h> | ||
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const static size_t MAX_IO_SIZE = 2 * 1024 * 1024; | ||
static std::random_device rd; | ||
static std::mt19937 gen(rd()); | ||
static uint64_t qps = 0; | ||
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DEFINE_uint64(io_depth, 128, "io depth"); | ||
DEFINE_string(disk_path, "", "disk path. For example, /dev/nvme2n1"); | ||
DEFINE_uint64(disk_size, 0, "disk size. For example, 1000000000000. No need to align. Can be approximate number"); | ||
DEFINE_uint64(io_size, 4096, "io size"); | ||
DEFINE_bool(io_uring, false, "test io_uring or aio"); | ||
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#define ROUND_DOWN(N, S) ((N) & ~((S) - 1)) | ||
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static uint64_t random(uint64_t N) { | ||
std::uniform_int_distribution<size_t> distrib(0, N); | ||
return distrib(gen); | ||
} | ||
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static void show_qps_loop() { | ||
while (true) { | ||
photon::thread_sleep(1); | ||
LOG_INFO("QPS: `, BW: ` MB/s", qps, qps * FLAGS_io_size / 1024 / 1024); | ||
qps = 0; | ||
} | ||
} | ||
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static void infinite_read(const uint64_t max_offset, photon::fs::IFile* src_file, IOAlloc* alloc) { | ||
size_t count = FLAGS_io_size; | ||
void* buf = alloc->alloc(count); | ||
while (true) { | ||
uint64_t offset = ROUND_DOWN(random(max_offset), count); | ||
int ret = src_file->pread(buf, FLAGS_io_size, offset); | ||
if (ret != (int) count) { | ||
LOG_ERROR("read fail, count `, offset `, ret `, errno `", count, offset, ret, ERRNO()); | ||
exit(1); | ||
} | ||
qps++; | ||
} | ||
} | ||
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int main(int argc, char** arg) { | ||
gflags::ParseCommandLineFlags(&argc, &arg, true); | ||
log_output_level = ALOG_INFO; | ||
if (FLAGS_disk_path.empty()) { | ||
LOG_ERROR_RETURN(0, -1, "need disk path"); | ||
} | ||
if (FLAGS_disk_size < 10'000'000'000UL) { | ||
LOG_ERROR_RETURN(0, -1, "need disk size"); | ||
} | ||
LOG_INFO("Specify disk ` size `", FLAGS_disk_path.c_str(), FLAGS_disk_size); | ||
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int ev_engine = FLAGS_io_uring ? photon::INIT_EVENT_IOURING : photon::INIT_EVENT_EPOLL; | ||
int io_engine = FLAGS_io_uring ? photon::INIT_IO_NONE : photon::INIT_IO_LIBAIO; | ||
int fs_io_engine = FLAGS_io_uring ? photon::fs::ioengine_iouring : photon::fs::ioengine_libaio; | ||
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int ret = photon::init(ev_engine, io_engine, photon::PhotonOptions{.libaio_queue_depth = 512}); | ||
if (ret != 0) { | ||
LOG_ERROR_RETURN(0, -1, "init failed"); | ||
} | ||
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photon::thread_create11(show_qps_loop); | ||
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// Read only open with direct-IO | ||
int flags = O_RDONLY | O_DIRECT; | ||
auto file = photon::fs::open_localfile_adaptor(FLAGS_disk_path.c_str(), flags, 0644, fs_io_engine); | ||
if (!file) { | ||
LOG_ERROR_RETURN(0, -1, "open failed"); | ||
} | ||
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// The allocator is only for aio 4K mem align | ||
// io_uring doesn't require mem align | ||
AlignedAlloc io_alloc(4096); | ||
uint64_t max_offset = FLAGS_disk_size - MAX_IO_SIZE; | ||
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for (uint64_t i = 0; i < FLAGS_io_depth; i++) { | ||
photon::thread_create11(infinite_read, max_offset, file, &io_alloc); | ||
} | ||
photon::thread_sleep(-1); | ||
} |