fio 启动流程梳理
- main (main thread)
- fio_backend
- run_threads
- loop jobs: backend.c#L2354
- call job_setup backend.c#L2368
- loop jobs: backend.c#L2406
- pthread_create(thread_main, &job) backend.c#L2459
- loop jobs: backend.c#L2354
- run_threads
- fio_backend
- job_thread (thread_main) backend.c#L1626
- td_io_init backend.c#L1803 ioengines.c#L462
- td->io_ops->init(td)
- init_io_u backend.c#L1254
- loop iodepths backend.c#L1274
- td->io_ops->io_u_init backend.c#L1302
- loop iodepths backend.c#L1274
- do_io backend.c#L947
- get_io_u io_u.c#L1768:14
- set_io_u_file
- fill_io_u
- set_io_u_file
- loop
- io_u_submit
- td_io_queue
- td->io_ops->queue()
- fio_posixaio_queue /engines/posixaio.c#LL136C26-L136C44
- td->io_ops->queue()
- td_io_queue
- wait_for_completions backend.c#L415
- io_u_queued_complete io_u.c#L2177
- td_io_getevents
- td->io_ops->getevents
- fio_posixaio_getevents
- td->io_ops->getevents
- ios_completed
- td->io_ops->event(td, i);
- fio_posixaio_event
- td->io_ops->event(td, i);
- td_io_getevents
- io_u_queued_complete io_u.c#L2177
- io_u_submit
- get_io_u io_u.c#L1768:14
- td_io_init backend.c#L1803 ioengines.c#L462