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vhost: extract session_vq_io_stats_update

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Change-Id: Id0349d571c974e963fbbf080bd6e2fe113b13622
Signed-off-by: Liu Xiaodong <xiaodong.liu@intel.com>
Reviewed-on: https://review.spdk.io/gerrit/c/spdk/spdk/+/4769
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Community-CI: Mellanox Build Bot
Reviewed-by: Changpeng Liu <changpeng.liu@intel.com>
Reviewed-by: Ben Walker <benjamin.walker@intel.com>
Reviewed-by: Shuhei Matsumoto <shuhei.matsumoto.xt@hitachi.com>
Reviewed-by: Jim Harris <james.r.harris@intel.com>
This commit is contained in:
Liu Xiaodong 2020-10-20 08:31:17 -04:00 committed by Tomasz Zawadzki
parent 3e2c9092d4
commit 6a1ec6a640
1 changed files with 21 additions and 15 deletions
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36
lib/vhost/vhost.c
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@ -305,15 +305,31 @@ vhost_vq_used_signal(struct spdk_vhost_session *vsession,
}
}
static void
session_vq_io_stats_update(struct spdk_vhost_session *vsession,
struct spdk_vhost_virtqueue *virtqueue, uint64_t now)
{
uint32_t irq_delay_base = vsession->coalescing_delay_time_base;
uint32_t io_threshold = vsession->coalescing_io_rate_threshold;
int32_t irq_delay;
uint32_t req_cnt;
req_cnt = virtqueue->req_cnt + virtqueue->used_req_cnt;
if (req_cnt <= io_threshold) {
return;
}
irq_delay = (irq_delay_base * (req_cnt - io_threshold)) / io_threshold;
virtqueue->irq_delay_time = (uint32_t) spdk_max(0, irq_delay);
virtqueue->req_cnt = 0;
virtqueue->next_event_time = now;
}
static void
check_session_io_stats(struct spdk_vhost_session *vsession, uint64_t now)
{
struct spdk_vhost_virtqueue *virtqueue;
uint32_t irq_delay_base = vsession->coalescing_delay_time_base;
uint32_t io_threshold = vsession->coalescing_io_rate_threshold;
int32_t irq_delay;
uint32_t req_cnt;
uint16_t q_idx;
if (now < vsession->next_stats_check_time) {
@ -323,17 +339,7 @@ check_session_io_stats(struct spdk_vhost_session *vsession, uint64_t now)
vsession->next_stats_check_time = now + vsession->stats_check_interval;
for (q_idx = 0; q_idx < vsession->max_queues; q_idx++) {
virtqueue = &vsession->virtqueue[q_idx];
req_cnt = virtqueue->req_cnt + virtqueue->used_req_cnt;
if (req_cnt <= io_threshold) {
continue;
}
irq_delay = (irq_delay_base * (req_cnt - io_threshold)) / io_threshold;
virtqueue->irq_delay_time = (uint32_t) spdk_max(0, irq_delay);
virtqueue->req_cnt = 0;
virtqueue->next_event_time = now;
session_vq_io_stats_update(vsession, virtqueue, now);
}
}