diff options
| author | zhenwei pi <pizhenwei@bytedance.com> | 2024-04-23 06:41:08 +0300 |
|---|---|---|
| committer | Michael S. Tsirkin <mst@redhat.com> | 2024-09-10 09:51:47 +0300 |
| commit | c5b70a26aac39f09a23fd72f44cfbb3d4d5a14d5 (patch) | |
| tree | 31b02648195f6998b0f3f71f492a9897f540c246 /drivers/virtio | |
| parent | 6cf1c97dad2ebc4de03105cc444b3dfaa83f3dc2 (diff) | |
| download | linux-c5b70a26aac39f09a23fd72f44cfbb3d4d5a14d5.tar.xz | |
virtio_balloon: introduce memory allocation stall counter
Memory allocation stall counter represents the performance/latency of
memory allocation, expose this counter to the host side by virtio
balloon device via out-of-bound way.
Acked-by: David Hildenbrand <david@redhat.com>
Signed-off-by: zhenwei pi <pizhenwei@bytedance.com>
Message-Id: <20240423034109.1552866-4-pizhenwei@bytedance.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Diffstat (limited to 'drivers/virtio')
| -rw-r--r-- | drivers/virtio/virtio_balloon.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/drivers/virtio/virtio_balloon.c b/drivers/virtio/virtio_balloon.c index b54392366142..6f108b2977de 100644 --- a/drivers/virtio/virtio_balloon.c +++ b/drivers/virtio/virtio_balloon.c @@ -355,6 +355,8 @@ static inline unsigned int update_balloon_vm_stats(struct virtio_balloon *vb) { unsigned long events[NR_VM_EVENT_ITEMS]; unsigned int idx = 0; + unsigned int zid; + unsigned long stall = 0; all_vm_events(events); update_stat(vb, idx++, VIRTIO_BALLOON_S_SWAP_IN, @@ -365,6 +367,12 @@ static inline unsigned int update_balloon_vm_stats(struct virtio_balloon *vb) update_stat(vb, idx++, VIRTIO_BALLOON_S_MINFLT, events[PGFAULT]); update_stat(vb, idx++, VIRTIO_BALLOON_S_OOM_KILL, events[OOM_KILL]); + /* sum all the stall events */ + for (zid = 0; zid < MAX_NR_ZONES; zid++) + stall += events[ALLOCSTALL_NORMAL - ZONE_NORMAL + zid]; + + update_stat(vb, idx++, VIRTIO_BALLOON_S_ALLOC_STALL, stall); + #ifdef CONFIG_HUGETLB_PAGE update_stat(vb, idx++, VIRTIO_BALLOON_S_HTLB_PGALLOC, events[HTLB_BUDDY_PGALLOC]); |