freebsd-skq/sys/dev/nvme/nvme_test.c
jimharris ece1c1fcc9 Revert r244549.
This change was originally intended to account for test kthreads under
the nvmecontrol process, but jhb indicated it may not be safe to
associate kthreads with userland processes and this could have
unintended consequences.

I did not observe any problems with this change, but my testing didn't
exhaust the kinds of corner cases that could cause problems.  It is not
that important to account for these test threads under nvmecontrol, so I
am just reverting this change for now.

On a related note, the part of this patch for <= 7.x fails compilation
so reverting this fixes that too.

Suggested by: jhb
2013-01-07 21:35:25 +00:00

306 lines
7.1 KiB
C

/*-
* Copyright (C) 2012 Intel Corporation
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/bio.h>
#include <sys/conf.h>
#include <sys/fcntl.h>
#include <sys/kthread.h>
#include <sys/module.h>
#include <sys/proc.h>
#include <sys/syscallsubr.h>
#include <sys/sysctl.h>
#include <sys/sysproto.h>
#include <sys/systm.h>
#include <sys/unistd.h>
#include <geom/geom.h>
#include "nvme_private.h"
struct nvme_io_test_thread {
uint32_t idx;
struct nvme_namespace *ns;
enum nvme_nvm_opcode opc;
struct timeval start;
void *buf;
uint32_t size;
uint32_t time;
uint32_t io_completed;
};
struct nvme_io_test_internal {
struct nvme_namespace *ns;
enum nvme_nvm_opcode opc;
struct timeval start;
uint32_t time;
uint32_t size;
uint32_t td_active;
uint32_t td_idx;
uint32_t flags;
uint32_t io_completed[NVME_TEST_MAX_THREADS];
};
static void
nvme_ns_bio_test_cb(struct bio *bio)
{
struct mtx *mtx;
mtx = mtx_pool_find(mtxpool_sleep, bio);
mtx_lock(mtx);
wakeup(bio);
mtx_unlock(mtx);
}
static void
nvme_ns_bio_test(void *arg)
{
struct nvme_io_test_internal *io_test = arg;
struct cdevsw *csw;
struct mtx *mtx;
struct bio *bio;
struct cdev *dev;
void *buf;
struct timeval t;
uint64_t offset;
uint32_t idx, io_completed = 0;
#if __FreeBSD_version >= 900017
int ref;
#endif
buf = malloc(io_test->size, M_NVME, M_NOWAIT);
idx = atomic_fetchadd_int(&io_test->td_idx, 1);
dev = io_test->ns->cdev;
offset = idx * 2048 * nvme_ns_get_sector_size(io_test->ns);
while (1) {
bio = g_alloc_bio();
memset(bio, 0, sizeof(*bio));
bio->bio_cmd = (io_test->opc == NVME_OPC_READ) ?
BIO_READ : BIO_WRITE;
bio->bio_done = nvme_ns_bio_test_cb;
bio->bio_dev = dev;
bio->bio_offset = offset;
bio->bio_data = buf;
bio->bio_bcount = io_test->size;
if (io_test->flags & NVME_TEST_FLAG_REFTHREAD) {
#if __FreeBSD_version >= 900017
csw = dev_refthread(dev, &ref);
#else
csw = dev_refthread(dev);
#endif
} else
csw = dev->si_devsw;
mtx = mtx_pool_find(mtxpool_sleep, bio);
mtx_lock(mtx);
(*csw->d_strategy)(bio);
msleep(bio, mtx, PRIBIO, "biotestwait", 0);
mtx_unlock(mtx);
if (io_test->flags & NVME_TEST_FLAG_REFTHREAD) {
#if __FreeBSD_version >= 900017
dev_relthread(dev, ref);
#else
dev_relthread(dev);
#endif
}
if ((bio->bio_flags & BIO_ERROR) || (bio->bio_resid > 0))
break;
g_destroy_bio(bio);
io_completed++;
getmicrouptime(&t);
timevalsub(&t, &io_test->start);
if (t.tv_sec >= io_test->time)
break;
offset += io_test->size;
if ((offset + io_test->size) > nvme_ns_get_size(io_test->ns))
offset = 0;
}
io_test->io_completed[idx] = io_completed;
wakeup_one(io_test);
free(buf, M_NVME);
atomic_subtract_int(&io_test->td_active, 1);
mb();
#if __FreeBSD_version >= 800000
kthread_exit();
#else
kthread_exit(0);
#endif
}
static void
nvme_ns_io_test_cb(void *arg, const struct nvme_completion *status)
{
struct nvme_io_test_thread *tth = arg;
struct timeval t;
tth->io_completed++;
if (status->sf_sc || status->sf_sct) {
printf("%s: error occurred\n", __func__);
wakeup_one(tth);
return;
}
getmicrouptime(&t);
timevalsub(&t, &tth->start);
if (t.tv_sec >= tth->time) {
wakeup_one(tth);
return;
}
switch (tth->opc) {
case NVME_OPC_WRITE:
nvme_ns_cmd_write(tth->ns, tth->buf, tth->idx * 2048,
tth->size/nvme_ns_get_sector_size(tth->ns),
nvme_ns_io_test_cb, tth);
break;
case NVME_OPC_READ:
nvme_ns_cmd_read(tth->ns, tth->buf, tth->idx * 2048,
tth->size/nvme_ns_get_sector_size(tth->ns),
nvme_ns_io_test_cb, tth);
break;
default:
break;
}
}
static void
nvme_ns_io_test(void *arg)
{
struct nvme_io_test_internal *io_test = arg;
struct nvme_io_test_thread *tth;
struct nvme_completion cpl;
int error;
tth = malloc(sizeof(*tth), M_NVME, M_NOWAIT | M_ZERO);
tth->ns = io_test->ns;
tth->opc = io_test->opc;
memcpy(&tth->start, &io_test->start, sizeof(tth->start));
tth->buf = malloc(io_test->size, M_NVME, M_NOWAIT);
tth->size = io_test->size;
tth->time = io_test->time;
tth->idx = atomic_fetchadd_int(&io_test->td_idx, 1);
memset(&cpl, 0, sizeof(cpl));
nvme_ns_io_test_cb(tth, &cpl);
error = tsleep(tth, 0, "test_wait", tth->time*hz*2);
if (error)
printf("%s: error = %d\n", __func__, error);
io_test->io_completed[tth->idx] = tth->io_completed;
wakeup_one(io_test);
free(tth->buf, M_NVME);
free(tth, M_NVME);
atomic_subtract_int(&io_test->td_active, 1);
mb();
#if __FreeBSD_version >= 800004
kthread_exit();
#else
kthread_exit(0);
#endif
}
void
nvme_ns_test(struct nvme_namespace *ns, u_long cmd, caddr_t arg)
{
struct nvme_io_test *io_test;
struct nvme_io_test_internal *io_test_internal;
void (*fn)(void *);
int i;
io_test = (struct nvme_io_test *)arg;
if ((io_test->opc != NVME_OPC_READ) &&
(io_test->opc != NVME_OPC_WRITE))
return;
if (io_test->size % nvme_ns_get_sector_size(ns))
return;
io_test_internal = malloc(sizeof(*io_test_internal), M_NVME,
M_NOWAIT | M_ZERO);
io_test_internal->opc = io_test->opc;
io_test_internal->ns = ns;
io_test_internal->td_active = io_test->num_threads;
io_test_internal->time = io_test->time;
io_test_internal->size = io_test->size;
io_test_internal->flags = io_test->flags;
if (cmd == NVME_IO_TEST)
fn = nvme_ns_io_test;
else
fn = nvme_ns_bio_test;
getmicrouptime(&io_test_internal->start);
for (i = 0; i < io_test->num_threads; i++)
#if __FreeBSD_version >= 800004
kthread_add(fn, io_test_internal,
NULL, NULL, 0, 0, "nvme_io_test[%d]", i);
#else
kthread_create(fn, io_test_internal,
NULL, 0, 0, "nvme_io_test[%d]", i);
#endif
tsleep(io_test_internal, 0, "nvme_test", io_test->time * 2 * hz);
while (io_test_internal->td_active > 0)
DELAY(10);
memcpy(io_test->io_completed, io_test_internal->io_completed,
sizeof(io_test->io_completed));
free(io_test_internal, M_NVME);
}