[libvirt] [PATCH v7 7/7] qemu-probes: add probes for cache MemoryStats cache

From: Igor Redko <redkoi(a)virtuozzo.com&gt; Signed-off-by: Igor Redko <redkoi(a)virtuozzo.com&gt; Signed-off-by: Derbyshev Dmitry <dderbyshev(a)virtuozzo.com&gt; --- src/libvirt_qemu_probes.d | 4 ++++ src/qemu/qemu_driver.c | 7 +++++++ 2 files changed, 11 insertions(+) diff --git a/src/libvirt_qemu_probes.d b/src/libvirt_qemu_probes.d index e4449a9..1a36026 100644 --- a/src/libvirt_qemu_probes.d +++ b/src/libvirt_qemu_probes.d @@ -19,4 +19,8 @@ provider libvirt { probe qemu_monitor_io_read(void *mon, const char *buf, unsigned int len, int ret, int errno); probe qemu_monitor_io_write(void *mon, const char *buf, unsigned int len, int ret, int errno); probe qemu_monitor_io_send_fd(void *mon, int fd, int ret, int errno); + + # Memory statistics caching + probe qemu_memstats_cache_expires(unsigned long long old_expire, unsigned long long new_expire); + probe qemu_memstats_cache_expired(unsigned long long expire, unsigned long long now); }; diff --git a/src/qemu/qemu_driver.c b/src/qemu/qemu_driver.c index 616b87d..d14009e 100644 --- a/src/qemu/qemu_driver.c +++ b/src/qemu/qemu_driver.c @@ -105,6 +105,11 @@ #include "virnuma.h" #include "dirname.h" #include "network/bridge_driver.h" +#include "virprobe.h" + +#ifdef WITH_DTRACE_PROBES +# include "libvirt_qemu_probes.h" +#endif #define VIR_FROM_THIS VIR_FROM_QEMU @@ -11000,6 +11005,7 @@ qemuDomainCacheMemoryStats(virDomainObjPtr vm, /* period also in secs */ expires = (timestamp > now) ? now : timestamp + def->memballoon->period * 1000; + PROBE(QEMU_MEMSTATS_CACHE_EXPIRES, "old=%llu new=%llu", priv->cacheExpires, expires); if (expires < now || expires <= priv->cacheExpires) goto cleanup; @@ -11032,6 +11038,7 @@ qemuDomainCachedMemoryStats(virDomainObjPtr vm, goto cleanup; if (now > priv->cacheExpires){ + PROBE(QEMU_MEMSTATS_CACHE_EXPIRED, "old=%llu new=%llu", priv->cacheExpires, now); goto cleanup; } -- 1.9.5.msysgit.0