| /* | |
| * QEMU throttling infrastructure | |
| * | |
| * Copyright (C) Nodalink, EURL. 2013-2014 | |
| * Copyright (C) Igalia, S.L. 2015 | |
| * | |
| * Authors: | |
| * Benoît Canet <benoit.canet@nodalink.com> | |
| * Alberto Garcia <berto@igalia.com> | |
| * | |
| * This program is free software; you can redistribute it and/or | |
| * modify it under the terms of the GNU General Public License as | |
| * published by the Free Software Foundation; either version 2 or | |
| * (at your option) version 3 of the License. | |
| * | |
| * This program is distributed in the hope that it will be useful, | |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| * GNU General Public License for more details. | |
| * | |
| * You should have received a copy of the GNU General Public License | |
| * along with this program; if not, see <http://www.gnu.org/licenses/>. | |
| */ | |
| #include "qemu/osdep.h" | |
| #include "qapi/error.h" | |
| #include "qemu/throttle.h" | |
| #include "qemu/timer.h" | |
| #include "qemu/aio.h" | |
| /* This function make a bucket leak | |
| * | |
| * @bkt: the bucket to make leak | |
| * @delta_ns: the time delta | |
| */ | |
| void throttle_leak_bucket(LeakyBucket *bkt, int64_t delta_ns) | |
| { | |
| double leak; | |
| /* compute how much to leak */ | |
| leak = (bkt->avg * (double) delta_ns) / NANOSECONDS_PER_SECOND; | |
| /* make the bucket leak */ | |
| bkt->level = MAX(bkt->level - leak, 0); | |
| /* if we allow bursts for more than one second we also need to | |
| * keep track of bkt->burst_level so the bkt->max goal per second | |
| * is attained */ | |
| if (bkt->burst_length > 1) { | |
| leak = (bkt->max * (double) delta_ns) / NANOSECONDS_PER_SECOND; | |
| bkt->burst_level = MAX(bkt->burst_level - leak, 0); | |
| } | |
| } | |
| /* Calculate the time delta since last leak and make proportionals leaks | |
| * | |
| * @now: the current timestamp in ns | |
| */ | |
| static void throttle_do_leak(ThrottleState *ts, int64_t now) | |
| { | |
| /* compute the time elapsed since the last leak */ | |
| int64_t delta_ns = now - ts->previous_leak; | |
| int i; | |
| ts->previous_leak = now; | |
| if (delta_ns <= 0) { | |
| return; | |
| } | |
| /* make each bucket leak */ | |
| for (i = 0; i < BUCKETS_COUNT; i++) { | |
| throttle_leak_bucket(&ts->cfg.buckets[i], delta_ns); | |
| } | |
| } | |
| /* do the real job of computing the time to wait | |
| * | |
| * @limit: the throttling limit | |
| * @extra: the number of operation to delay | |
| * @ret: the time to wait in ns | |
| */ | |
| static int64_t throttle_do_compute_wait(double limit, double extra) | |
| { | |
| double wait = extra * NANOSECONDS_PER_SECOND; | |
| wait /= limit; | |
| return wait; | |
| } | |
| /* This function compute the wait time in ns that a leaky bucket should trigger | |
| * | |
| * @bkt: the leaky bucket we operate on | |
| * @ret: the resulting wait time in ns or 0 if the operation can go through | |
| */ | |
| int64_t throttle_compute_wait(LeakyBucket *bkt) | |
| { | |
| double extra; /* the number of extra units blocking the io */ | |
| double bucket_size; /* I/O before throttling to bkt->avg */ | |
| double burst_bucket_size; /* Before throttling to bkt->max */ | |
| if (!bkt->avg) { | |
| return 0; | |
| } | |
| if (!bkt->max) { | |
| /* If bkt->max is 0 we still want to allow short bursts of I/O | |
| * from the guest, otherwise every other request will be throttled | |
| * and performance will suffer considerably. */ | |
| bucket_size = (double) bkt->avg / 10; | |
| burst_bucket_size = 0; | |
| } else { | |
| /* If we have a burst limit then we have to wait until all I/O | |
| * at burst rate has finished before throttling to bkt->avg */ | |
| bucket_size = bkt->max * bkt->burst_length; | |
| burst_bucket_size = (double) bkt->max / 10; | |
| } | |
| /* If the main bucket is full then we have to wait */ | |
| extra = bkt->level - bucket_size; | |
| if (extra > 0) { | |
| return throttle_do_compute_wait(bkt->avg, extra); | |
| } | |
| /* If the main bucket is not full yet we still have to check the | |
| * burst bucket in order to enforce the burst limit */ | |
| if (bkt->burst_length > 1) { | |
| assert(bkt->max > 0); /* see throttle_is_valid() */ | |
| extra = bkt->burst_level - burst_bucket_size; | |
| if (extra > 0) { | |
| return throttle_do_compute_wait(bkt->max, extra); | |
| } | |
| } | |
| return 0; | |
| } | |
| /* This function compute the time that must be waited while this IO | |
| * | |
| * @direction: throttle direction | |
| * @ret: time to wait | |
| */ | |
| static int64_t throttle_compute_wait_for(ThrottleState *ts, | |
| ThrottleDirection direction) | |
| { | |
| static const BucketType to_check[THROTTLE_MAX][4] = { | |
| {THROTTLE_BPS_TOTAL, | |
| THROTTLE_OPS_TOTAL, | |
| THROTTLE_BPS_READ, | |
| THROTTLE_OPS_READ}, | |
| {THROTTLE_BPS_TOTAL, | |
| THROTTLE_OPS_TOTAL, | |
| THROTTLE_BPS_WRITE, | |
| THROTTLE_OPS_WRITE}, }; | |
| int64_t wait, max_wait = 0; | |
| int i; | |
| for (i = 0; i < ARRAY_SIZE(to_check[THROTTLE_READ]); i++) { | |
| BucketType index = to_check[direction][i]; | |
| wait = throttle_compute_wait(&ts->cfg.buckets[index]); | |
| if (wait > max_wait) { | |
| max_wait = wait; | |
| } | |
| } | |
| return max_wait; | |
| } | |
| /* compute the timer for this 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, | |
| ThrottleDirection direction, | |
| int64_t now, | |
| int64_t *next_timestamp) | |
| { | |
| int64_t wait; | |
| /* leak proportionally to the time elapsed */ | |
| throttle_do_leak(ts, now); | |
| /* compute the wait time if any */ | |
| wait = throttle_compute_wait_for(ts, direction); | |
| /* if the code must wait compute when the next timer should fire */ | |
| if (wait) { | |
| *next_timestamp = now + wait; | |
| return true; | |
| } | |
| /* else no need to wait at all */ | |
| *next_timestamp = now; | |
| return false; | |
| } | |
| /* Add timers to event loop */ | |
| void throttle_timers_attach_aio_context(ThrottleTimers *tt, | |
| AioContext *new_context) | |
| { | |
| ThrottleDirection dir; | |
| for (dir = THROTTLE_READ; dir < THROTTLE_MAX; dir++) { | |
| if (tt->timer_cb[dir]) { | |
| tt->timers[dir] = | |
| aio_timer_new(new_context, tt->clock_type, SCALE_NS, | |
| tt->timer_cb[dir], tt->timer_opaque); | |
| } | |
| } | |
| } | |
| /* | |
| * Initialize the ThrottleConfig structure to a valid state | |
| * @cfg: the config to initialize | |
| */ | |
| void throttle_config_init(ThrottleConfig *cfg) | |
| { | |
| unsigned i; | |
| memset(cfg, 0, sizeof(*cfg)); | |
| for (i = 0; i < BUCKETS_COUNT; i++) { | |
| cfg->buckets[i].burst_length = 1; | |
| } | |
| } | |
| /* To be called first on the ThrottleState */ | |
| void throttle_init(ThrottleState *ts) | |
| { | |
| memset(ts, 0, sizeof(ThrottleState)); | |
| throttle_config_init(&ts->cfg); | |
| } | |
| /* To be called first on the ThrottleTimers */ | |
| void throttle_timers_init(ThrottleTimers *tt, | |
| AioContext *aio_context, | |
| QEMUClockType clock_type, | |
| QEMUTimerCB *read_timer_cb, | |
| QEMUTimerCB *write_timer_cb, | |
| void *timer_opaque) | |
| { | |
| assert(read_timer_cb || write_timer_cb); | |
| memset(tt, 0, sizeof(ThrottleTimers)); | |
| tt->clock_type = clock_type; | |
| tt->timer_cb[THROTTLE_READ] = read_timer_cb; | |
| tt->timer_cb[THROTTLE_WRITE] = write_timer_cb; | |
| tt->timer_opaque = timer_opaque; | |
| throttle_timers_attach_aio_context(tt, aio_context); | |
| } | |
| /* destroy a timer */ | |
| static void throttle_timer_destroy(QEMUTimer **timer) | |
| { | |
| if (*timer == NULL) { | |
| return; | |
| } | |
| timer_free(*timer); | |
| *timer = NULL; | |
| } | |
| /* Remove timers from event loop */ | |
| void throttle_timers_detach_aio_context(ThrottleTimers *tt) | |
| { | |
| ThrottleDirection dir; | |
| for (dir = THROTTLE_READ; dir < THROTTLE_MAX; dir++) { | |
| throttle_timer_destroy(&tt->timers[dir]); | |
| } | |
| } | |
| /* To be called last on the ThrottleTimers */ | |
| void throttle_timers_destroy(ThrottleTimers *tt) | |
| { | |
| throttle_timers_detach_aio_context(tt); | |
| } | |
| /* is any throttling timer configured */ | |
| bool throttle_timers_are_initialized(ThrottleTimers *tt) | |
| { | |
| ThrottleDirection dir; | |
| for (dir = THROTTLE_READ; dir < THROTTLE_MAX; dir++) { | |
| if (tt->timers[dir]) { | |
| return true; | |
| } | |
| } | |
| return false; | |
| } | |
| /* Does any throttling must be done | |
| * | |
| * @cfg: the throttling configuration to inspect | |
| * @ret: true if throttling must be done else false | |
| */ | |
| bool throttle_enabled(ThrottleConfig *cfg) | |
| { | |
| int i; | |
| for (i = 0; i < BUCKETS_COUNT; i++) { | |
| if (cfg->buckets[i].avg > 0) { | |
| return true; | |
| } | |
| } | |
| return false; | |
| } | |
| /* check if a throttling configuration is valid | |
| * @cfg: the throttling configuration to inspect | |
| * @ret: true if valid else false | |
| * @errp: error object | |
| */ | |
| bool throttle_is_valid(ThrottleConfig *cfg, Error **errp) | |
| { | |
| int i; | |
| bool bps_flag, ops_flag; | |
| bool bps_max_flag, ops_max_flag; | |
| bps_flag = cfg->buckets[THROTTLE_BPS_TOTAL].avg && | |
| (cfg->buckets[THROTTLE_BPS_READ].avg || | |
| cfg->buckets[THROTTLE_BPS_WRITE].avg); | |
| ops_flag = cfg->buckets[THROTTLE_OPS_TOTAL].avg && | |
| (cfg->buckets[THROTTLE_OPS_READ].avg || | |
| cfg->buckets[THROTTLE_OPS_WRITE].avg); | |
| bps_max_flag = cfg->buckets[THROTTLE_BPS_TOTAL].max && | |
| (cfg->buckets[THROTTLE_BPS_READ].max || | |
| cfg->buckets[THROTTLE_BPS_WRITE].max); | |
| ops_max_flag = cfg->buckets[THROTTLE_OPS_TOTAL].max && | |
| (cfg->buckets[THROTTLE_OPS_READ].max || | |
| cfg->buckets[THROTTLE_OPS_WRITE].max); | |
| if (bps_flag || ops_flag || bps_max_flag || ops_max_flag) { | |
| error_setg(errp, "bps/iops/max total values and read/write values" | |
| " cannot be used at the same time"); | |
| return false; | |
| } | |
| if (cfg->op_size && | |
| !cfg->buckets[THROTTLE_OPS_TOTAL].avg && | |
| !cfg->buckets[THROTTLE_OPS_READ].avg && | |
| !cfg->buckets[THROTTLE_OPS_WRITE].avg) { | |
| error_setg(errp, "iops size requires an iops value to be set"); | |
| return false; | |
| } | |
| for (i = 0; i < BUCKETS_COUNT; i++) { | |
| LeakyBucket *bkt = &cfg->buckets[i]; | |
| if (bkt->avg > THROTTLE_VALUE_MAX || bkt->max > THROTTLE_VALUE_MAX) { | |
| error_setg(errp, "bps/iops/max values must be within [0, %lld]", | |
| THROTTLE_VALUE_MAX); | |
| return false; | |
| } | |
| if (!bkt->burst_length) { | |
| error_setg(errp, "the burst length cannot be 0"); | |
| return false; | |
| } | |
| if (bkt->burst_length > 1 && !bkt->max) { | |
| error_setg(errp, "burst length set without burst rate"); | |
| return false; | |
| } | |
| if (bkt->max && bkt->burst_length > THROTTLE_VALUE_MAX / bkt->max) { | |
| error_setg(errp, "burst length too high for this burst rate"); | |
| return false; | |
| } | |
| if (bkt->max && !bkt->avg) { | |
| error_setg(errp, "bps_max/iops_max require corresponding" | |
| " bps/iops values"); | |
| return false; | |
| } | |
| if (bkt->max && bkt->max < bkt->avg) { | |
| error_setg(errp, "bps_max/iops_max cannot be lower than bps/iops"); | |
| return false; | |
| } | |
| } | |
| return true; | |
| } | |
| /* Used to configure the throttle | |
| * | |
| * @ts: the throttle state we are working on | |
| * @clock_type: the group's clock_type | |
| * @cfg: the config to set | |
| */ | |
| void throttle_config(ThrottleState *ts, | |
| QEMUClockType clock_type, | |
| ThrottleConfig *cfg) | |
| { | |
| int i; | |
| ts->cfg = *cfg; | |
| /* Zero bucket level */ | |
| for (i = 0; i < BUCKETS_COUNT; i++) { | |
| ts->cfg.buckets[i].level = 0; | |
| ts->cfg.buckets[i].burst_level = 0; | |
| } | |
| ts->previous_leak = qemu_clock_get_ns(clock_type); | |
| } | |
| /* used to get config | |
| * | |
| * @ts: the throttle state we are working on | |
| * @cfg: the config to write | |
| */ | |
| void throttle_get_config(ThrottleState *ts, ThrottleConfig *cfg) | |
| { | |
| *cfg = ts->cfg; | |
| } | |
| /* Schedule the read or write timer if needed | |
| * | |
| * NOTE: this function is not unit tested due to it's usage of timer_mod | |
| * | |
| * @tt: the timers structure | |
| * @direction: throttle direction | |
| * @ret: true if the timer has been scheduled else false | |
| */ | |
| bool throttle_schedule_timer(ThrottleState *ts, | |
| ThrottleTimers *tt, | |
| ThrottleDirection direction) | |
| { | |
| int64_t now = qemu_clock_get_ns(tt->clock_type); | |
| int64_t next_timestamp; | |
| QEMUTimer *timer; | |
| bool must_wait; | |
| assert(direction < THROTTLE_MAX); | |
| timer = tt->timers[direction]; | |
| assert(timer); | |
| must_wait = throttle_compute_timer(ts, | |
| direction, | |
| now, | |
| &next_timestamp); | |
| /* request not throttled */ | |
| if (!must_wait) { | |
| return false; | |
| } | |
| /* request throttled and timer pending -> do nothing */ | |
| if (timer_pending(timer)) { | |
| return true; | |
| } | |
| /* request throttled and timer not pending -> arm timer */ | |
| timer_mod(timer, next_timestamp); | |
| return true; | |
| } | |
| /* do the accounting for this operation | |
| * | |
| * @direction: throttle direction | |
| * @size: the size of the operation | |
| */ | |
| void throttle_account(ThrottleState *ts, ThrottleDirection direction, | |
| uint64_t size) | |
| { | |
| static const BucketType bucket_types_size[THROTTLE_MAX][2] = { | |
| { THROTTLE_BPS_TOTAL, THROTTLE_BPS_READ }, | |
| { THROTTLE_BPS_TOTAL, THROTTLE_BPS_WRITE } | |
| }; | |
| static const BucketType bucket_types_units[THROTTLE_MAX][2] = { | |
| { THROTTLE_OPS_TOTAL, THROTTLE_OPS_READ }, | |
| { THROTTLE_OPS_TOTAL, THROTTLE_OPS_WRITE } | |
| }; | |
| 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; | |
| } | |
| for (i = 0; i < ARRAY_SIZE(bucket_types_size[THROTTLE_READ]); i++) { | |
| LeakyBucket *bkt; | |
| 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[direction][i]]; | |
| bkt->level += units; | |
| if (bkt->burst_length > 1) { | |
| bkt->burst_level += units; | |
| } | |
| } | |
| } | |
| /* return a ThrottleConfig based on the options in a ThrottleLimits | |
| * | |
| * @arg: the ThrottleLimits object to read from | |
| * @cfg: the ThrottleConfig to edit | |
| * @errp: error object | |
| */ | |
| void throttle_limits_to_config(ThrottleLimits *arg, ThrottleConfig *cfg, | |
| Error **errp) | |
| { | |
| if (arg->has_bps_total) { | |
| cfg->buckets[THROTTLE_BPS_TOTAL].avg = arg->bps_total; | |
| } | |
| if (arg->has_bps_read) { | |
| cfg->buckets[THROTTLE_BPS_READ].avg = arg->bps_read; | |
| } | |
| if (arg->has_bps_write) { | |
| cfg->buckets[THROTTLE_BPS_WRITE].avg = arg->bps_write; | |
| } | |
| if (arg->has_iops_total) { | |
| cfg->buckets[THROTTLE_OPS_TOTAL].avg = arg->iops_total; | |
| } | |
| if (arg->has_iops_read) { | |
| cfg->buckets[THROTTLE_OPS_READ].avg = arg->iops_read; | |
| } | |
| if (arg->has_iops_write) { | |
| cfg->buckets[THROTTLE_OPS_WRITE].avg = arg->iops_write; | |
| } | |
| if (arg->has_bps_total_max) { | |
| cfg->buckets[THROTTLE_BPS_TOTAL].max = arg->bps_total_max; | |
| } | |
| if (arg->has_bps_read_max) { | |
| cfg->buckets[THROTTLE_BPS_READ].max = arg->bps_read_max; | |
| } | |
| if (arg->has_bps_write_max) { | |
| cfg->buckets[THROTTLE_BPS_WRITE].max = arg->bps_write_max; | |
| } | |
| if (arg->has_iops_total_max) { | |
| cfg->buckets[THROTTLE_OPS_TOTAL].max = arg->iops_total_max; | |
| } | |
| if (arg->has_iops_read_max) { | |
| cfg->buckets[THROTTLE_OPS_READ].max = arg->iops_read_max; | |
| } | |
| if (arg->has_iops_write_max) { | |
| cfg->buckets[THROTTLE_OPS_WRITE].max = arg->iops_write_max; | |
| } | |
| if (arg->has_bps_total_max_length) { | |
| if (arg->bps_total_max_length > UINT_MAX) { | |
| error_setg(errp, "bps-total-max-length value must be in" | |
| " the range [0, %u]", UINT_MAX); | |
| return; | |
| } | |
| cfg->buckets[THROTTLE_BPS_TOTAL].burst_length = arg->bps_total_max_length; | |
| } | |
| if (arg->has_bps_read_max_length) { | |
| if (arg->bps_read_max_length > UINT_MAX) { | |
| error_setg(errp, "bps-read-max-length value must be in" | |
| " the range [0, %u]", UINT_MAX); | |
| return; | |
| } | |
| cfg->buckets[THROTTLE_BPS_READ].burst_length = arg->bps_read_max_length; | |
| } | |
| if (arg->has_bps_write_max_length) { | |
| if (arg->bps_write_max_length > UINT_MAX) { | |
| error_setg(errp, "bps-write-max-length value must be in" | |
| " the range [0, %u]", UINT_MAX); | |
| return; | |
| } | |
| cfg->buckets[THROTTLE_BPS_WRITE].burst_length = arg->bps_write_max_length; | |
| } | |
| if (arg->has_iops_total_max_length) { | |
| if (arg->iops_total_max_length > UINT_MAX) { | |
| error_setg(errp, "iops-total-max-length value must be in" | |
| " the range [0, %u]", UINT_MAX); | |
| return; | |
| } | |
| cfg->buckets[THROTTLE_OPS_TOTAL].burst_length = arg->iops_total_max_length; | |
| } | |
| if (arg->has_iops_read_max_length) { | |
| if (arg->iops_read_max_length > UINT_MAX) { | |
| error_setg(errp, "iops-read-max-length value must be in" | |
| " the range [0, %u]", UINT_MAX); | |
| return; | |
| } | |
| cfg->buckets[THROTTLE_OPS_READ].burst_length = arg->iops_read_max_length; | |
| } | |
| if (arg->has_iops_write_max_length) { | |
| if (arg->iops_write_max_length > UINT_MAX) { | |
| error_setg(errp, "iops-write-max-length value must be in" | |
| " the range [0, %u]", UINT_MAX); | |
| return; | |
| } | |
| cfg->buckets[THROTTLE_OPS_WRITE].burst_length = arg->iops_write_max_length; | |
| } | |
| if (arg->has_iops_size) { | |
| cfg->op_size = arg->iops_size; | |
| } | |
| throttle_is_valid(cfg, errp); | |
| } | |
| /* write the options of a ThrottleConfig to a ThrottleLimits | |
| * | |
| * @cfg: the ThrottleConfig to read from | |
| * @var: the ThrottleLimits to write to | |
| */ | |
| void throttle_config_to_limits(ThrottleConfig *cfg, ThrottleLimits *var) | |
| { | |
| var->bps_total = cfg->buckets[THROTTLE_BPS_TOTAL].avg; | |
| var->bps_read = cfg->buckets[THROTTLE_BPS_READ].avg; | |
| var->bps_write = cfg->buckets[THROTTLE_BPS_WRITE].avg; | |
| var->iops_total = cfg->buckets[THROTTLE_OPS_TOTAL].avg; | |
| var->iops_read = cfg->buckets[THROTTLE_OPS_READ].avg; | |
| var->iops_write = cfg->buckets[THROTTLE_OPS_WRITE].avg; | |
| var->bps_total_max = cfg->buckets[THROTTLE_BPS_TOTAL].max; | |
| var->bps_read_max = cfg->buckets[THROTTLE_BPS_READ].max; | |
| var->bps_write_max = cfg->buckets[THROTTLE_BPS_WRITE].max; | |
| var->iops_total_max = cfg->buckets[THROTTLE_OPS_TOTAL].max; | |
| var->iops_read_max = cfg->buckets[THROTTLE_OPS_READ].max; | |
| var->iops_write_max = cfg->buckets[THROTTLE_OPS_WRITE].max; | |
| var->bps_total_max_length = cfg->buckets[THROTTLE_BPS_TOTAL].burst_length; | |
| var->bps_read_max_length = cfg->buckets[THROTTLE_BPS_READ].burst_length; | |
| var->bps_write_max_length = cfg->buckets[THROTTLE_BPS_WRITE].burst_length; | |
| var->iops_total_max_length = cfg->buckets[THROTTLE_OPS_TOTAL].burst_length; | |
| var->iops_read_max_length = cfg->buckets[THROTTLE_OPS_READ].burst_length; | |
| var->iops_write_max_length = cfg->buckets[THROTTLE_OPS_WRITE].burst_length; | |
| var->iops_size = cfg->op_size; | |
| var->has_bps_total = true; | |
| var->has_bps_read = true; | |
| var->has_bps_write = true; | |
| var->has_iops_total = true; | |
| var->has_iops_read = true; | |
| var->has_iops_write = true; | |
| var->has_bps_total_max = true; | |
| var->has_bps_read_max = true; | |
| var->has_bps_write_max = true; | |
| var->has_iops_total_max = true; | |
| var->has_iops_read_max = true; | |
| var->has_iops_write_max = true; | |
| var->has_bps_read_max_length = true; | |
| var->has_bps_total_max_length = true; | |
| var->has_bps_write_max_length = true; | |
| var->has_iops_total_max_length = true; | |
| var->has_iops_read_max_length = true; | |
| var->has_iops_write_max_length = true; | |
| var->has_iops_size = true; | |
| } |