Qemu added reporting of virtio balloon new statistics stat-htlb-pgalloc and
stat-htlb-pgfail since qemu-3.0 commit b7b12644297. The value of
stat-htlb-pgalloc represents the number of successful hugetlb page allocations
while stat-htlb-pgfail represents the number of failed ones. Add this
statistics reporting to libvirt.
To enable this feature for vm, guest kenel >= 4.17 is required because
the exporting hugetlb page allocation for virtio balloon is introduced
since 6c64fe7f.
Signed-off-by: Han Han <hhan@xxxxxxxxxx>
---
include/libvirt/libvirt-domain.h | 14 +++++++++++++-
src/libvirt-domain.c | 5 ++++-
src/qemu/qemu_driver.c | 2 ++
src/qemu/qemu_monitor_json.c | 5 +++++
tools/virsh-domain-monitor.c | 4 ++++
tools/virsh.pod | 2 ++
6 files changed, 30 insertions(+), 2 deletions(-)
diff --git a/include/libvirt/libvirt-domain.h b/include/libvirt/libvirt-domain.h
index 7d36820b5a..192d25c1db 100644
--- a/include/libvirt/libvirt-domain.h
+++ b/include/libvirt/libvirt-domain.h
@@ -636,11 +636,23 @@ typedef enum {
*/
VIR_DOMAIN_MEMORY_STAT_DISK_CACHES = 10,
+ /*
+ * The amount of successful hugetlb(Huge Page Tables) allocations via
+ * virtio balloon.
+ */
+ VIR_DOMAIN_MEMORY_STAT_HUGETLB_PGALLOC = 11,
+
+ /*
+ * The amount of failed hugetlb(Huge Page Tables) allocations via
+ * virtio balloon.
+ */
+ VIR_DOMAIN_MEMORY_STAT_HUGETLB_PGFAIL = 12,
+
/*
* The number of statistics supported by this version of the interface.
* To add new statistics, add them to the enum and increase this value.
*/
- VIR_DOMAIN_MEMORY_STAT_NR = 11,
+ VIR_DOMAIN_MEMORY_STAT_NR = 13,
# ifdef VIR_ENUM_SENTINELS
VIR_DOMAIN_MEMORY_STAT_LAST = VIR_DOMAIN_MEMORY_STAT_NR
diff --git a/src/libvirt-domain.c b/src/libvirt-domain.c
index 80284a99f0..a95690e8a4 100644
--- a/src/libvirt-domain.c
+++ b/src/libvirt-domain.c
@@ -5734,7 +5734,10 @@ virDomainGetInterfaceParameters(virDomainPtr domain,
* VIR_DOMAIN_MEMORY_STAT_DISK_CACHES
* Memory that can be reclaimed without additional I/O, typically disk
* caches (in kb).
- *
+ * VIR_DOMAIN_MEMORY_STAT_HUGETLB_PGALLOC
+ * The amount of successful hugetlb(Huge Page Tables) allocations
+ * VIR_DOMAIN_MEMORY_STAT_HUGETLB_PGFAIL
+ * The amount of failed hugetlb(Huge Page Tables) allocations
* Returns: The number of stats provided or -1 in case of failure.
*/
int
diff --git a/src/qemu/qemu_driver.c b/src/qemu/qemu_driver.c
index f48d9256e4..2d849beac8 100644
--- a/src/qemu/qemu_driver.c
+++ b/src/qemu/qemu_driver.c
@@ -20245,6 +20245,8 @@ qemuDomainGetStatsBalloon(virQEMUDriverPtr driver,
STORE_MEM_RECORD(LAST_UPDATE, "last-update")
STORE_MEM_RECORD(USABLE, "usable")
STORE_MEM_RECORD(DISK_CACHES, "disk_caches")
+ STORE_MEM_RECORD(HUGETLB_PGALLOC, "hugetlb_pgalloc")
+ STORE_MEM_RECORD(HUGETLB_PGFAIL, "hugetlb_pgfail")
}
#undef STORE_MEM_RECORD
diff --git a/src/qemu/qemu_monitor_json.c b/src/qemu/qemu_monitor_json.c
index 908967f46c..5e3df5e759 100644
--- a/src/qemu/qemu_monitor_json.c
+++ b/src/qemu/qemu_monitor_json.c
@@ -2150,6 +2150,11 @@ int qemuMonitorJSONGetMemoryStats(qemuMonitorPtr mon,
VIR_DOMAIN_MEMORY_STAT_LAST_UPDATE, 1);
GET_BALLOON_STATS(statsdata, "stat-disk-caches",
VIR_DOMAIN_MEMORY_STAT_DISK_CACHES, 1024);
+ GET_BALLOON_STATS(statsdata, "stat-htlb-pgalloc",
+ VIR_DOMAIN_MEMORY_STAT_HUGETLB_PGALLOC, 1);
+ GET_BALLOON_STATS(statsdata, "stat-htlb-pgfail",
+ VIR_DOMAIN_MEMORY_STAT_HUGETLB_PGFAIL, 1);
+
ret = got;
cleanup:
virJSONValueFree(cmd);
diff --git a/tools/virsh-domain-monitor.c b/tools/virsh-domain-monitor.c
index d87475f6f6..0092a9786e 100644
--- a/tools/virsh-domain-monitor.c
+++ b/tools/virsh-domain-monitor.c
@@ -376,6 +376,10 @@ cmdDomMemStat(vshControl *ctl, const vshCmd *cmd)
vshPrint(ctl, "last_update %llu\n", stats[i].val);
if (stats[i].tag == VIR_DOMAIN_MEMORY_STAT_DISK_CACHES)
vshPrint(ctl, "disk_caches %llu\n", stats[i].val);
+ if (stats[i].tag == VIR_DOMAIN_MEMORY_STAT_HUGETLB_PGALLOC)
+ vshPrint(ctl, "hugetlb_pgalloc %llu\n", stats[i].val);
+ if (stats[i].tag == VIR_DOMAIN_MEMORY_STAT_HUGETLB_PGFAIL)
+ vshPrint(ctl, "hugetlb_pgfail %llu\n", stats[i].val);
}
ret = true;
diff --git a/tools/virsh.pod b/tools/virsh.pod
index afc1684db0..ef27c527d6 100644
--- a/tools/virsh.pod
+++ b/tools/virsh.pod
@@ -938,6 +938,8 @@ without causing host swapping (in KiB)
last-update - Timestamp of the last update of statistics (in seconds)
disk_caches - The amount of memory that can be reclaimed without
additional I/O, typically disk caches (in KiB)
+ hugetlb_pgalloc - The number of successful huge page table allocations
+ hugetlb_pgfail - The number of failed huge page table allocations
For QEMU/KVM with a memory balloon, setting the optional I<--period> to a
value larger than 0 in seconds will allow the balloon driver to return
--
2.20.1
--
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