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[Qemu-devel] [PATCH] virtio-balloon: add huge page allocation statistics
From: |
Jonathan Helman |
Subject: |
[Qemu-devel] [PATCH] virtio-balloon: add huge page allocation statistics |
Date: |
Thu, 15 Feb 2018 14:06:40 -0800 |
qemu should read and report huge page allocation
statistics exported in the following kernel patch:
commit 01be4bb1aafeab73feba628c6dd120cd6647faae
Author: Jonathan Helman <address@hidden>
Date: Thu Feb 15 10:59:03 2018 -0800
virtio_balloon: export huge page allocation statistics
Export statistics for successful and failed huge page allocations
from the virtio balloon driver. These 2 stats come directly from
the vm_events HTLB_BUDDY_PGALLOC and HTLB_BUDDY_PGALLOC_FAIL.
Signed-off-by: Jonathan Helman <address@hidden>
---
docs/virtio-balloon-stats.txt | 2 ++
hw/virtio/virtio-balloon.c | 2 ++
include/standard-headers/linux/virtio_balloon.h | 4 +++-
3 files changed, 7 insertions(+), 1 deletion(-)
diff --git a/docs/virtio-balloon-stats.txt b/docs/virtio-balloon-stats.txt
index edff5f2..12d33a7 100644
--- a/docs/virtio-balloon-stats.txt
+++ b/docs/virtio-balloon-stats.txt
@@ -32,6 +32,8 @@ which will return a dictionary containing:
- stat-minor-faults
- stat-free-memory
- stat-total-memory
+ - stat-htlb-pgalloc
+ - stat-htlb-pgfail
o A key named last-update, which contains the last stats update
timestamp in seconds. Since this timestamp is generated by the host,
diff --git a/hw/virtio/virtio-balloon.c b/hw/virtio/virtio-balloon.c
index 4822449..f4f2b98 100644
--- a/hw/virtio/virtio-balloon.c
+++ b/hw/virtio/virtio-balloon.c
@@ -52,6 +52,8 @@ static const char *balloon_stat_names[] = {
[VIRTIO_BALLOON_S_MEMTOT] = "stat-total-memory",
[VIRTIO_BALLOON_S_AVAIL] = "stat-available-memory",
[VIRTIO_BALLOON_S_CACHES] = "stat-disk-caches",
+ [VIRTIO_BALLOON_S_HTLB_PGALLOC] = "stat-htlb-pgalloc",
+ [VIRTIO_BALLOON_S_HTLB_PGFAIL] = "stat-htlb-pgfail",
[VIRTIO_BALLOON_S_NR] = NULL
};
diff --git a/include/standard-headers/linux/virtio_balloon.h
b/include/standard-headers/linux/virtio_balloon.h
index 7b0a41b..ed445b6 100644
--- a/include/standard-headers/linux/virtio_balloon.h
+++ b/include/standard-headers/linux/virtio_balloon.h
@@ -53,7 +53,9 @@ struct virtio_balloon_config {
#define VIRTIO_BALLOON_S_MEMTOT 5 /* Total amount of memory */
#define VIRTIO_BALLOON_S_AVAIL 6 /* Available memory as in /proc */
#define VIRTIO_BALLOON_S_CACHES 7 /* Disk caches */
-#define VIRTIO_BALLOON_S_NR 8
+#define VIRTIO_BALLOON_S_HTLB_PGALLOC 8 /* Number of htlb pgalloc successes
*/
+#define VIRTIO_BALLOON_S_HTLB_PGFAIL 9 /* Number of htlb pgalloc failures */
+#define VIRTIO_BALLOON_S_NR 10
/*
* Memory statistics structure.
--
1.8.3.1
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