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throttle: use enum ThrottleDirection instead of bool is_write 

enum ThrottleDirection is already there, use ThrottleDirection instead
of 'bool is_write' for throttle API, also modify related codes from
block, fsdev, cryptodev and tests.

Reviewed-by: Hanna Czenczek <hreitz@redhat.com>
Signed-off-by: zhenwei pi <pizhenwei@bytedance.com>
Message-Id: <20230728022006.1098509-7-pizhenwei@bytedance.com>
Signed-off-by: Hanna Czenczek <hreitz@redhat.com>
master
zhenwei pi 2023-07-28 10:20:03 +08:00 committed by Hanna Czenczek
parent 27cf12298a
commit e76f201f69
6 changed files with 36 additions and 27 deletions
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9
backends/cryptodev.c
View File

@ -252,10 +252,11 @@ static void cryptodev_backend_throttle_timer_cb(void *opaque)
continue;
}
throttle_account(&backend->ts, true, ret);
throttle_account(&backend->ts, THROTTLE_WRITE, ret);
cryptodev_backend_operation(backend, op_info);
if (throttle_enabled(&backend->tc) &&
throttle_schedule_timer(&backend->ts, &backend->tt, true)) {
throttle_schedule_timer(&backend->ts, &backend->tt,
THROTTLE_WRITE)) {
break;
}
}
@ -271,7 +272,7 @@ int cryptodev_backend_crypto_operation(
goto do_account;
}
if (throttle_schedule_timer(&backend->ts, &backend->tt, true) ||
if (throttle_schedule_timer(&backend->ts, &backend->tt, THROTTLE_WRITE) ||
!QTAILQ_EMPTY(&backend->opinfos)) {
QTAILQ_INSERT_TAIL(&backend->opinfos, op_info, next);
return 0;
@ -283,7 +284,7 @@ do_account:
return ret;
}
throttle_account(&backend->ts, true, ret);
throttle_account(&backend->ts, THROTTLE_WRITE, ret);
return cryptodev_backend_operation(backend, op_info);
}

6
block/throttle-groups.c
View File

@ -270,6 +270,7 @@ static bool throttle_group_schedule_timer(ThrottleGroupMember *tgm,
ThrottleState *ts = tgm->throttle_state;
ThrottleGroup *tg = container_of(ts, ThrottleGroup, ts);
ThrottleTimers *tt = &tgm->throttle_timers;
ThrottleDirection direction = is_write ? THROTTLE_WRITE : THROTTLE_READ;
bool must_wait;
if (qatomic_read(&tgm->io_limits_disabled)) {
@ -281,7 +282,7 @@ static bool throttle_group_schedule_timer(ThrottleGroupMember *tgm,
return true;
}
must_wait = throttle_schedule_timer(ts, tt, is_write);
must_wait = throttle_schedule_timer(ts, tt, direction);
/* If a timer just got armed, set tgm as the current token */
if (must_wait) {
@ -364,6 +365,7 @@ void coroutine_fn throttle_group_co_io_limits_intercept(ThrottleGroupMember *tgm
bool must_wait;
ThrottleGroupMember *token;
ThrottleGroup *tg = container_of(tgm->throttle_state, ThrottleGroup, ts);
ThrottleDirection direction = is_write ? THROTTLE_WRITE : THROTTLE_READ;
assert(bytes >= 0);
@ -386,7 +388,7 @@ void coroutine_fn throttle_group_co_io_limits_intercept(ThrottleGroupMember *tgm
}
/* The I/O will be executed, so do the accounting */
throttle_account(tgm->throttle_state, is_write, bytes);
throttle_account(tgm->throttle_state, direction, bytes);
/* Schedule the next request */
schedule_next_request(tgm, is_write);

8
fsdev/qemu-fsdev-throttle.c
View File

@ -97,16 +97,18 @@ void fsdev_throttle_init(FsThrottle *fst)
void coroutine_fn fsdev_co_throttle_request(FsThrottle *fst, bool is_write,
struct iovec *iov, int iovcnt)
{
ThrottleDirection direction = is_write ? THROTTLE_WRITE : THROTTLE_READ;
if (throttle_enabled(&fst->cfg)) {
if (throttle_schedule_timer(&fst->ts, &fst->tt, is_write) ||
if (throttle_schedule_timer(&fst->ts, &fst->tt, direction) ||
!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));
throttle_account(&fst->ts, direction, iov_size(iov, iovcnt));
if (!qemu_co_queue_empty(&fst->throttled_reqs[is_write]) &&
!throttle_schedule_timer(&fst->ts, &fst->tt, is_write)) {
!throttle_schedule_timer(&fst->ts, &fst->tt, direction)) {
qemu_co_queue_next(&fst->throttled_reqs[is_write]);
}
}

5
include/qemu/throttle.h
View File

@ -154,9 +154,10 @@ void throttle_config_init(ThrottleConfig *cfg);
/* usage */
bool throttle_schedule_timer(ThrottleState *ts,
ThrottleTimers *tt,
bool is_write);
ThrottleDirection direction);
void throttle_account(ThrottleState *ts, bool is_write, uint64_t size);
void throttle_account(ThrottleState *ts, ThrottleDirection direction,
uint64_t size);
void throttle_limits_to_config(ThrottleLimits *arg, ThrottleConfig *cfg,
Error **errp);
void throttle_config_to_limits(ThrottleConfig *cfg, ThrottleLimits *var);

4
tests/unit/test-throttle.c
View File

@ -637,9 +637,9 @@ static bool do_test_accounting(bool is_ops, /* are we testing bps or ops */
throttle_config(&ts, QEMU_CLOCK_VIRTUAL, &cfg);
/* account a read */
throttle_account(&ts, false, size);
throttle_account(&ts, THROTTLE_READ, size);
/* account a write */
throttle_account(&ts, true, size);
throttle_account(&ts, THROTTLE_WRITE, size);
/* check total result */
index = to_test[is_ops][0];

31
util/throttle.c
View File

@ -136,11 +136,11 @@ int64_t throttle_compute_wait(LeakyBucket *bkt)
/* This function compute the time that must be waited while this IO
*
* @is_write: true if the current IO is a write, false if it's a read
* @direction: throttle direction
* @ret: time to wait
*/
static int64_t throttle_compute_wait_for(ThrottleState *ts,
bool is_write)
ThrottleDirection direction)
{
BucketType to_check[2][4] = { {THROTTLE_BPS_TOTAL,
THROTTLE_OPS_TOTAL,
@ -154,7 +154,7 @@ static int64_t throttle_compute_wait_for(ThrottleState *ts,
int i;
for (i = 0; i < 4; i++) {
BucketType index = to_check[is_write][i];
BucketType index = to_check[direction][i];
wait = throttle_compute_wait(&ts->cfg.buckets[index]);
if (wait > max_wait) {
max_wait = wait;
@ -166,13 +166,13 @@ static int64_t throttle_compute_wait_for(ThrottleState *ts,
/* compute the timer for this type of operation
*
* @is_write: the type of operation
* @direction: throttle direction
* @now: the current clock timestamp
* @next_timestamp: the resulting timer
* @ret: true if a timer must be set
*/
static bool throttle_compute_timer(ThrottleState *ts,
bool is_write,
ThrottleDirection direction,
int64_t now,
int64_t *next_timestamp)
{
@ -182,7 +182,7 @@ static bool throttle_compute_timer(ThrottleState *ts,
throttle_do_leak(ts, now);
/* compute the wait time if any */
wait = throttle_compute_wait_for(ts, is_write);
wait = throttle_compute_wait_for(ts, direction);
/* if the code must wait compute when the next timer should fire */
if (wait) {
@ -425,23 +425,24 @@ void throttle_get_config(ThrottleState *ts, ThrottleConfig *cfg)
* NOTE: this function is not unit tested due to it's usage of timer_mod
*
* @tt: the timers structure
* @is_write: the type of operation (read/write)
* @direction: throttle direction
* @ret: true if the timer has been scheduled else false
*/
bool throttle_schedule_timer(ThrottleState *ts,
ThrottleTimers *tt,
bool is_write)
ThrottleDirection direction)
{
int64_t now = qemu_clock_get_ns(tt->clock_type);
int64_t next_timestamp;
QEMUTimer *timer;
bool must_wait;
timer = is_write ? tt->timers[THROTTLE_WRITE] : tt->timers[THROTTLE_READ];
assert(direction < THROTTLE_MAX);
timer = tt->timers[direction];
assert(timer);
must_wait = throttle_compute_timer(ts,
is_write,
direction,
now,
&next_timestamp);
@ -462,10 +463,11 @@ bool throttle_schedule_timer(ThrottleState *ts,
/* do the accounting for this operation
*
* @is_write: the type of operation (read/write)
* @direction: throttle direction
* @size: the size of the operation
*/
void throttle_account(ThrottleState *ts, bool is_write, uint64_t size)
void throttle_account(ThrottleState *ts, ThrottleDirection direction,
uint64_t size)
{
const BucketType bucket_types_size[2][2] = {
{ THROTTLE_BPS_TOTAL, THROTTLE_BPS_READ },
@ -478,6 +480,7 @@ void throttle_account(ThrottleState *ts, bool is_write, uint64_t size)
double units = 1.0;
unsigned i;
assert(direction < THROTTLE_MAX);
/* if cfg.op_size is defined and smaller than size we compute unit count */
if (ts->cfg.op_size && size > ts->cfg.op_size) {
units = (double) size / ts->cfg.op_size;
@ -486,13 +489,13 @@ void throttle_account(ThrottleState *ts, bool is_write, uint64_t size)
for (i = 0; i < 2; i++) {
LeakyBucket *bkt;
bkt = &ts->cfg.buckets[bucket_types_size[is_write][i]];
bkt = &ts->cfg.buckets[bucket_types_size[direction][i]];
bkt->level += size;
if (bkt->burst_length > 1) {
bkt->burst_level += size;
}
bkt = &ts->cfg.buckets[bucket_types_units[is_write][i]];
bkt = &ts->cfg.buckets[bucket_types_units[direction][i]];
bkt->level += units;
if (bkt->burst_length > 1) {
bkt->burst_level += units;