1 files changed, 0 insertions, 592 deletions

diff --git a/tools/io_uring/io_uring-bench.c b/tools/io_uring/io_uring-bench.c
deleted file mode 100644
index 0f257139b003..000000000000
--- a/tools/io_uring/io_uring-bench.c
+++ /dev/null
@@ -1,592 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- * Simple benchmark program that uses the various features of io_uring
- * to provide fast random access to a device/file. It has various
- * options that are control how we use io_uring, see the OPTIONS section
- * below. This uses the raw io_uring interface.
- *
- * Copyright (C) 2018-2019 Jens Axboe
- */
-#include <stdio.h>
-#include <errno.h>
-#include <assert.h>
-#include <stdlib.h>
-#include <stddef.h>
-#include <signal.h>
-#include <inttypes.h>
-
-#include <sys/types.h>
-#include <sys/stat.h>
-#include <sys/ioctl.h>
-#include <sys/syscall.h>
-#include <sys/resource.h>
-#include <sys/mman.h>
-#include <sys/uio.h>
-#include <linux/fs.h>
-#include <fcntl.h>
-#include <unistd.h>
-#include <string.h>
-#include <pthread.h>
-#include <sched.h>
-
-#include "liburing.h"
-#include "barrier.h"
-
-#define min(a, b)		((a < b) ? (a) : (b))
-
-struct io_sq_ring {
-	unsigned *head;
-	unsigned *tail;
-	unsigned *ring_mask;
-	unsigned *ring_entries;
-	unsigned *flags;
-	unsigned *array;
-};
-
-struct io_cq_ring {
-	unsigned *head;
-	unsigned *tail;
-	unsigned *ring_mask;
-	unsigned *ring_entries;
-	struct io_uring_cqe *cqes;
-};
-
-#define DEPTH			128
-
-#define BATCH_SUBMIT		32
-#define BATCH_COMPLETE		32
-
-#define BS			4096
-
-#define MAX_FDS			16
-
-static unsigned sq_ring_mask, cq_ring_mask;
-
-struct file {
-	unsigned long max_blocks;
-	unsigned pending_ios;
-	int real_fd;
-	int fixed_fd;
-};
-
-struct submitter {
-	pthread_t thread;
-	int ring_fd;
-	struct drand48_data rand;
-	struct io_sq_ring sq_ring;
-	struct io_uring_sqe *sqes;
-	struct iovec iovecs[DEPTH];
-	struct io_cq_ring cq_ring;
-	int inflight;
-	unsigned long reaps;
-	unsigned long done;
-	unsigned long calls;
-	volatile int finish;
-
-	__s32 *fds;
-
-	struct file files[MAX_FDS];
-	unsigned nr_files;
-	unsigned cur_file;
-};
-
-static struct submitter submitters[1];
-static volatile int finish;
-
-/*
- * OPTIONS: Set these to test the various features of io_uring.
- */
-static int polled = 1;		/* use IO polling */
-static int fixedbufs = 1;	/* use fixed user buffers */
-static int register_files = 1;	/* use fixed files */
-static int buffered = 0;	/* use buffered IO, not O_DIRECT */
-static int sq_thread_poll = 0;	/* use kernel submission/poller thread */
-static int sq_thread_cpu = -1;	/* pin above thread to this CPU */
-static int do_nop = 0;		/* no-op SQ ring commands */
-
-static int io_uring_register_buffers(struct submitter *s)
-{
-	if (do_nop)
-		return 0;
-
-	return io_uring_register(s->ring_fd, IORING_REGISTER_BUFFERS, s->iovecs,
-					DEPTH);
-}
-
-static int io_uring_register_files(struct submitter *s)
-{
-	unsigned i;
-
-	if (do_nop)
-		return 0;
-
-	s->fds = calloc(s->nr_files, sizeof(__s32));
-	for (i = 0; i < s->nr_files; i++) {
-		s->fds[i] = s->files[i].real_fd;
-		s->files[i].fixed_fd = i;
-	}
-
-	return io_uring_register(s->ring_fd, IORING_REGISTER_FILES, s->fds,
-					s->nr_files);
-}
-
-static int gettid(void)
-{
-	return syscall(__NR_gettid);
-}
-
-static unsigned file_depth(struct submitter *s)
-{
-	return (DEPTH + s->nr_files - 1) / s->nr_files;
-}
-
-static void init_io(struct submitter *s, unsigned index)
-{
-	struct io_uring_sqe *sqe = &s->sqes[index];
-	unsigned long offset;
-	struct file *f;
-	long r;
-
-	if (do_nop) {
-		sqe->opcode = IORING_OP_NOP;
-		return;
-	}
-
-	if (s->nr_files == 1) {
-		f = &s->files[0];
-	} else {
-		f = &s->files[s->cur_file];
-		if (f->pending_ios >= file_depth(s)) {
-			s->cur_file++;
-			if (s->cur_file == s->nr_files)
-				s->cur_file = 0;
-			f = &s->files[s->cur_file];
-		}
-	}
-	f->pending_ios++;
-
-	lrand48_r(&s->rand, &r);
-	offset = (r % (f->max_blocks - 1)) * BS;
-
-	if (register_files) {
-		sqe->flags = IOSQE_FIXED_FILE;
-		sqe->fd = f->fixed_fd;
-	} else {
-		sqe->flags = 0;
-		sqe->fd = f->real_fd;
-	}
-	if (fixedbufs) {
-		sqe->opcode = IORING_OP_READ_FIXED;
-		sqe->addr = (unsigned long) s->iovecs[index].iov_base;
-		sqe->len = BS;
-		sqe->buf_index = index;
-	} else {
-		sqe->opcode = IORING_OP_READV;
-		sqe->addr = (unsigned long) &s->iovecs[index];
-		sqe->len = 1;
-		sqe->buf_index = 0;
-	}
-	sqe->ioprio = 0;
-	sqe->off = offset;
-	sqe->user_data = (unsigned long) f;
-}
-
-static int prep_more_ios(struct submitter *s, unsigned max_ios)
-{
-	struct io_sq_ring *ring = &s->sq_ring;
-	unsigned index, tail, next_tail, prepped = 0;
-
-	next_tail = tail = *ring->tail;
-	do {
-		next_tail++;
-		read_barrier();
-		if (next_tail == *ring->head)
-			break;
-
-		index = tail & sq_ring_mask;
-		init_io(s, index);
-		ring->array[index] = index;
-		prepped++;
-		tail = next_tail;
-	} while (prepped < max_ios);
-
-	if (*ring->tail != tail) {
-		/* order tail store with writes to sqes above */
-		write_barrier();
-		*ring->tail = tail;
-		write_barrier();
-	}
-	return prepped;
-}
-
-static int get_file_size(struct file *f)
-{
-	struct stat st;
-
-	if (fstat(f->real_fd, &st) < 0)
-		return -1;
-	if (S_ISBLK(st.st_mode)) {
-		unsigned long long bytes;
-
-		if (ioctl(f->real_fd, BLKGETSIZE64, &bytes) != 0)
-			return -1;
-
-		f->max_blocks = bytes / BS;
-		return 0;
-	} else if (S_ISREG(st.st_mode)) {
-		f->max_blocks = st.st_size / BS;
-		return 0;
-	}
-
-	return -1;
-}
-
-static int reap_events(struct submitter *s)
-{
-	struct io_cq_ring *ring = &s->cq_ring;
-	struct io_uring_cqe *cqe;
-	unsigned head, reaped = 0;
-
-	head = *ring->head;
-	do {
-		struct file *f;
-
-		read_barrier();
-		if (head == *ring->tail)
-			break;
-		cqe = &ring->cqes[head & cq_ring_mask];
-		if (!do_nop) {
-			f = (struct file *) (uintptr_t) cqe->user_data;
-			f->pending_ios--;
-			if (cqe->res != BS) {
-				printf("io: unexpected ret=%d\n", cqe->res);
-				if (polled && cqe->res == -EOPNOTSUPP)
-					printf("Your filesystem doesn't support poll\n");
-				return -1;
-			}
-		}
-		reaped++;
-		head++;
-	} while (1);
-
-	s->inflight -= reaped;
-	*ring->head = head;
-	write_barrier();
-	return reaped;
-}
-
-static void *submitter_fn(void *data)
-{
-	struct submitter *s = data;
-	struct io_sq_ring *ring = &s->sq_ring;
-	int ret, prepped;
-
-	printf("submitter=%d\n", gettid());
-
-	srand48_r(pthread_self(), &s->rand);
-
-	prepped = 0;
-	do {
-		int to_wait, to_submit, this_reap, to_prep;
-
-		if (!prepped && s->inflight < DEPTH) {
-			to_prep = min(DEPTH - s->inflight, BATCH_SUBMIT);
-			prepped = prep_more_ios(s, to_prep);
-		}
-		s->inflight += prepped;
-submit_more:
-		to_submit = prepped;
-submit:
-		if (to_submit && (s->inflight + to_submit <= DEPTH))
-			to_wait = 0;
-		else
-			to_wait = min(s->inflight + to_submit, BATCH_COMPLETE);
-
-		/*
-		 * Only need to call io_uring_enter if we're not using SQ thread
-		 * poll, or if IORING_SQ_NEED_WAKEUP is set.
-		 */
-		if (!sq_thread_poll || (*ring->flags & IORING_SQ_NEED_WAKEUP)) {
-			unsigned flags = 0;
-
-			if (to_wait)
-				flags = IORING_ENTER_GETEVENTS;
-			if ((*ring->flags & IORING_SQ_NEED_WAKEUP))
-				flags |= IORING_ENTER_SQ_WAKEUP;
-			ret = io_uring_enter(s->ring_fd, to_submit, to_wait,
-						flags, NULL);
-			s->calls++;
-		}
-
-		/*
-		 * For non SQ thread poll, we already got the events we needed
-		 * through the io_uring_enter() above. For SQ thread poll, we
-		 * need to loop here until we find enough events.
-		 */
-		this_reap = 0;
-		do {
-			int r;
-			r = reap_events(s);
-			if (r == -1) {
-				s->finish = 1;
-				break;
-			} else if (r > 0)
-				this_reap += r;
-		} while (sq_thread_poll && this_reap < to_wait);
-		s->reaps += this_reap;
-
-		if (ret >= 0) {
-			if (!ret) {
-				to_submit = 0;
-				if (s->inflight)
-					goto submit;
-				continue;
-			} else if (ret < to_submit) {
-				int diff = to_submit - ret;
-
-				s->done += ret;
-				prepped -= diff;
-				goto submit_more;
-			}
-			s->done += ret;
-			prepped = 0;
-			continue;
-		} else if (ret < 0) {
-			if (errno == EAGAIN) {
-				if (s->finish)
-					break;
-				if (this_reap)
-					goto submit;
-				to_submit = 0;
-				goto submit;
-			}
-			printf("io_submit: %s\n", strerror(errno));
-			break;
-		}
-	} while (!s->finish);
-
-	finish = 1;
-	return NULL;
-}
-
-static void sig_int(int sig)
-{
-	printf("Exiting on signal %d\n", sig);
-	submitters[0].finish = 1;
-	finish = 1;
-}
-
-static void arm_sig_int(void)
-{
-	struct sigaction act;
-
-	memset(&act, 0, sizeof(act));
-	act.sa_handler = sig_int;
-	act.sa_flags = SA_RESTART;
-	sigaction(SIGINT, &act, NULL);
-}
-
-static int setup_ring(struct submitter *s)
-{
-	struct io_sq_ring *sring = &s->sq_ring;
-	struct io_cq_ring *cring = &s->cq_ring;
-	struct io_uring_params p;
-	int ret, fd;
-	void *ptr;
-
-	memset(&p, 0, sizeof(p));
-
-	if (polled && !do_nop)
-		p.flags |= IORING_SETUP_IOPOLL;
-	if (sq_thread_poll) {
-		p.flags |= IORING_SETUP_SQPOLL;
-		if (sq_thread_cpu != -1) {
-			p.flags |= IORING_SETUP_SQ_AFF;
-			p.sq_thread_cpu = sq_thread_cpu;
-		}
-	}
-
-	fd = io_uring_setup(DEPTH, &p);
-	if (fd < 0) {
-		perror("io_uring_setup");
-		return 1;
-	}
-	s->ring_fd = fd;
-
-	if (fixedbufs) {
-		ret = io_uring_register_buffers(s);
-		if (ret < 0) {
-			perror("io_uring_register_buffers");
-			return 1;
-		}
-	}
-
-	if (register_files) {
-		ret = io_uring_register_files(s);
-		if (ret < 0) {
-			perror("io_uring_register_files");
-			return 1;
-		}
-	}
-
-	ptr = mmap(0, p.sq_off.array + p.sq_entries * sizeof(__u32),
-			PROT_READ | PROT_WRITE, MAP_SHARED | MAP_POPULATE, fd,
-			IORING_OFF_SQ_RING);
-	printf("sq_ring ptr = 0x%p\n", ptr);
-	sring->head = ptr + p.sq_off.head;
-	sring->tail = ptr + p.sq_off.tail;
-	sring->ring_mask = ptr + p.sq_off.ring_mask;
-	sring->ring_entries = ptr + p.sq_off.ring_entries;
-	sring->flags = ptr + p.sq_off.flags;
-	sring->array = ptr + p.sq_off.array;
-	sq_ring_mask = *sring->ring_mask;
-
-	s->sqes = mmap(0, p.sq_entries * sizeof(struct io_uring_sqe),
-			PROT_READ | PROT_WRITE, MAP_SHARED | MAP_POPULATE, fd,
-			IORING_OFF_SQES);
-	printf("sqes ptr    = 0x%p\n", s->sqes);
-
-	ptr = mmap(0, p.cq_off.cqes + p.cq_entries * sizeof(struct io_uring_cqe),
-			PROT_READ | PROT_WRITE, MAP_SHARED | MAP_POPULATE, fd,
-			IORING_OFF_CQ_RING);
-	printf("cq_ring ptr = 0x%p\n", ptr);
-	cring->head = ptr + p.cq_off.head;
-	cring->tail = ptr + p.cq_off.tail;
-	cring->ring_mask = ptr + p.cq_off.ring_mask;
-	cring->ring_entries = ptr + p.cq_off.ring_entries;
-	cring->cqes = ptr + p.cq_off.cqes;
-	cq_ring_mask = *cring->ring_mask;
-	return 0;
-}
-
-static void file_depths(char *buf)
-{
-	struct submitter *s = &submitters[0];
-	unsigned i;
-	char *p;
-
-	buf[0] = '\0';
-	p = buf;
-	for (i = 0; i < s->nr_files; i++) {
-		struct file *f = &s->files[i];
-
-		if (i + 1 == s->nr_files)
-			p += sprintf(p, "%d", f->pending_ios);
-		else
-			p += sprintf(p, "%d, ", f->pending_ios);
-	}
-}
-
-int main(int argc, char *argv[])
-{
-	struct submitter *s = &submitters[0];
-	unsigned long done, calls, reap;
-	int err, i, flags, fd;
-	char *fdepths;
-	void *ret;
-
-	if (!do_nop && argc < 2) {
-		printf("%s: filename\n", argv[0]);
-		return 1;
-	}
-
-	flags = O_RDONLY | O_NOATIME;
-	if (!buffered)
-		flags |= O_DIRECT;
-
-	i = 1;
-	while (!do_nop && i < argc) {
-		struct file *f;
-
-		if (s->nr_files == MAX_FDS) {
-			printf("Max number of files (%d) reached\n", MAX_FDS);
-			break;
-		}
-		fd = open(argv[i], flags);
-		if (fd < 0) {
-			perror("open");
-			return 1;
-		}
-
-		f = &s->files[s->nr_files];
-		f->real_fd = fd;
-		if (get_file_size(f)) {
-			printf("failed getting size of device/file\n");
-			return 1;
-		}
-		if (f->max_blocks <= 1) {
-			printf("Zero file/device size?\n");
-			return 1;
-		}
-		f->max_blocks--;
-
-		printf("Added file %s\n", argv[i]);
-		s->nr_files++;
-		i++;
-	}
-
-	if (fixedbufs) {
-		struct rlimit rlim;
-
-		rlim.rlim_cur = RLIM_INFINITY;
-		rlim.rlim_max = RLIM_INFINITY;
-		if (setrlimit(RLIMIT_MEMLOCK, &rlim) < 0) {
-			perror("setrlimit");
-			return 1;
-		}
-	}
-
-	arm_sig_int();
-
-	for (i = 0; i < DEPTH; i++) {
-		void *buf;
-
-		if (posix_memalign(&buf, BS, BS)) {
-			printf("failed alloc\n");
-			return 1;
-		}
-		s->iovecs[i].iov_base = buf;
-		s->iovecs[i].iov_len = BS;
-	}
-
-	err = setup_ring(s);
-	if (err) {
-		printf("ring setup failed: %s, %d\n", strerror(errno), err);
-		return 1;
-	}
-	printf("polled=%d, fixedbufs=%d, buffered=%d", polled, fixedbufs, buffered);
-	printf(" QD=%d, sq_ring=%d, cq_ring=%d\n", DEPTH, *s->sq_ring.ring_entries, *s->cq_ring.ring_entries);
-
-	pthread_create(&s->thread, NULL, submitter_fn, s);
-
-	fdepths = malloc(8 * s->nr_files);
-	reap = calls = done = 0;
-	do {
-		unsigned long this_done = 0;
-		unsigned long this_reap = 0;
-		unsigned long this_call = 0;
-		unsigned long rpc = 0, ipc = 0;
-
-		sleep(1);
-		this_done += s->done;
-		this_call += s->calls;
-		this_reap += s->reaps;
-		if (this_call - calls) {
-			rpc = (this_done - done) / (this_call - calls);
-			ipc = (this_reap - reap) / (this_call - calls);
-		} else
-			rpc = ipc = -1;
-		file_depths(fdepths);
-		printf("IOPS=%lu, IOS/call=%ld/%ld, inflight=%u (%s)\n",
-				this_done - done, rpc, ipc, s->inflight,
-				fdepths);
-		done = this_done;
-		calls = this_call;
-		reap = this_reap;
-	} while (!finish);
-
-	pthread_join(s->thread, &ret);
-	close(s->ring_fd);
-	free(fdepths);
-	return 0;
-}