mirror of
https://github.com/qemu/qemu.git
synced 2024-12-15 23:43:31 +08:00
ea52cdd443
It is more convenient to use the return value of the function to notify errors, rather than to be tied up setting up the &local_err boilerplate. Signed-off-by: Greg Kurz <groug@kaod.org>
121 lines
4.5 KiB
C
121 lines
4.5 KiB
C
/*
|
|
* Fsdev Throttle
|
|
*
|
|
* Copyright (C) 2016 Huawei Technologies Duesseldorf GmbH
|
|
*
|
|
* Author: Pradeep Jagadeesh <pradeep.jagadeesh@huawei.com>
|
|
*
|
|
* This work is licensed under the terms of the GNU GPL, version 2 or
|
|
* (at your option) any later version.
|
|
*
|
|
* See the COPYING file in the top-level directory for details.
|
|
*
|
|
*/
|
|
|
|
#include "qemu/osdep.h"
|
|
#include "qemu/error-report.h"
|
|
#include "qemu-fsdev-throttle.h"
|
|
#include "qemu/iov.h"
|
|
#include "qemu/main-loop.h"
|
|
#include "qemu/option.h"
|
|
|
|
static void fsdev_throttle_read_timer_cb(void *opaque)
|
|
{
|
|
FsThrottle *fst = opaque;
|
|
qemu_co_enter_next(&fst->throttled_reqs[false], NULL);
|
|
}
|
|
|
|
static void fsdev_throttle_write_timer_cb(void *opaque)
|
|
{
|
|
FsThrottle *fst = opaque;
|
|
qemu_co_enter_next(&fst->throttled_reqs[true], NULL);
|
|
}
|
|
|
|
int fsdev_throttle_parse_opts(QemuOpts *opts, FsThrottle *fst, Error **errp)
|
|
{
|
|
throttle_config_init(&fst->cfg);
|
|
fst->cfg.buckets[THROTTLE_BPS_TOTAL].avg =
|
|
qemu_opt_get_number(opts, "throttling.bps-total", 0);
|
|
fst->cfg.buckets[THROTTLE_BPS_READ].avg =
|
|
qemu_opt_get_number(opts, "throttling.bps-read", 0);
|
|
fst->cfg.buckets[THROTTLE_BPS_WRITE].avg =
|
|
qemu_opt_get_number(opts, "throttling.bps-write", 0);
|
|
fst->cfg.buckets[THROTTLE_OPS_TOTAL].avg =
|
|
qemu_opt_get_number(opts, "throttling.iops-total", 0);
|
|
fst->cfg.buckets[THROTTLE_OPS_READ].avg =
|
|
qemu_opt_get_number(opts, "throttling.iops-read", 0);
|
|
fst->cfg.buckets[THROTTLE_OPS_WRITE].avg =
|
|
qemu_opt_get_number(opts, "throttling.iops-write", 0);
|
|
|
|
fst->cfg.buckets[THROTTLE_BPS_TOTAL].max =
|
|
qemu_opt_get_number(opts, "throttling.bps-total-max", 0);
|
|
fst->cfg.buckets[THROTTLE_BPS_READ].max =
|
|
qemu_opt_get_number(opts, "throttling.bps-read-max", 0);
|
|
fst->cfg.buckets[THROTTLE_BPS_WRITE].max =
|
|
qemu_opt_get_number(opts, "throttling.bps-write-max", 0);
|
|
fst->cfg.buckets[THROTTLE_OPS_TOTAL].max =
|
|
qemu_opt_get_number(opts, "throttling.iops-total-max", 0);
|
|
fst->cfg.buckets[THROTTLE_OPS_READ].max =
|
|
qemu_opt_get_number(opts, "throttling.iops-read-max", 0);
|
|
fst->cfg.buckets[THROTTLE_OPS_WRITE].max =
|
|
qemu_opt_get_number(opts, "throttling.iops-write-max", 0);
|
|
|
|
fst->cfg.buckets[THROTTLE_BPS_TOTAL].burst_length =
|
|
qemu_opt_get_number(opts, "throttling.bps-total-max-length", 1);
|
|
fst->cfg.buckets[THROTTLE_BPS_READ].burst_length =
|
|
qemu_opt_get_number(opts, "throttling.bps-read-max-length", 1);
|
|
fst->cfg.buckets[THROTTLE_BPS_WRITE].burst_length =
|
|
qemu_opt_get_number(opts, "throttling.bps-write-max-length", 1);
|
|
fst->cfg.buckets[THROTTLE_OPS_TOTAL].burst_length =
|
|
qemu_opt_get_number(opts, "throttling.iops-total-max-length", 1);
|
|
fst->cfg.buckets[THROTTLE_OPS_READ].burst_length =
|
|
qemu_opt_get_number(opts, "throttling.iops-read-max-length", 1);
|
|
fst->cfg.buckets[THROTTLE_OPS_WRITE].burst_length =
|
|
qemu_opt_get_number(opts, "throttling.iops-write-max-length", 1);
|
|
fst->cfg.op_size =
|
|
qemu_opt_get_number(opts, "throttling.iops-size", 0);
|
|
|
|
return throttle_is_valid(&fst->cfg, errp) ? 0 : -1;
|
|
}
|
|
|
|
void fsdev_throttle_init(FsThrottle *fst)
|
|
{
|
|
if (throttle_enabled(&fst->cfg)) {
|
|
throttle_init(&fst->ts);
|
|
throttle_timers_init(&fst->tt,
|
|
qemu_get_aio_context(),
|
|
QEMU_CLOCK_REALTIME,
|
|
fsdev_throttle_read_timer_cb,
|
|
fsdev_throttle_write_timer_cb,
|
|
fst);
|
|
throttle_config(&fst->ts, QEMU_CLOCK_REALTIME, &fst->cfg);
|
|
qemu_co_queue_init(&fst->throttled_reqs[0]);
|
|
qemu_co_queue_init(&fst->throttled_reqs[1]);
|
|
}
|
|
}
|
|
|
|
void coroutine_fn fsdev_co_throttle_request(FsThrottle *fst, bool is_write,
|
|
struct iovec *iov, int iovcnt)
|
|
{
|
|
if (throttle_enabled(&fst->cfg)) {
|
|
if (throttle_schedule_timer(&fst->ts, &fst->tt, is_write) ||
|
|
!qemu_co_queue_empty(&fst->throttled_reqs[is_write])) {
|
|
qemu_co_queue_wait(&fst->throttled_reqs[is_write], NULL);
|
|
}
|
|
|
|
throttle_account(&fst->ts, is_write, iov_size(iov, iovcnt));
|
|
|
|
if (!qemu_co_queue_empty(&fst->throttled_reqs[is_write]) &&
|
|
!throttle_schedule_timer(&fst->ts, &fst->tt, is_write)) {
|
|
qemu_co_queue_next(&fst->throttled_reqs[is_write]);
|
|
}
|
|
}
|
|
}
|
|
|
|
void fsdev_throttle_cleanup(FsThrottle *fst)
|
|
{
|
|
if (throttle_enabled(&fst->cfg)) {
|
|
throttle_timers_destroy(&fst->tt);
|
|
}
|
|
}
|