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Diffstat (limited to 'results/scraper/launchpad-without-comments/1470720')
| -rw-r--r-- | results/scraper/launchpad-without-comments/1470720 | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/results/scraper/launchpad-without-comments/1470720 b/results/scraper/launchpad-without-comments/1470720 new file mode 100644 index 00000000..0fed0736 --- /dev/null +++ b/results/scraper/launchpad-without-comments/1470720 @@ -0,0 +1,16 @@ +high IRQ-TLB generates network interruptions + + we are having a problem in our hosts, all the vm running on them suddenly, and for some seconds, lost network connectivity. + +the root cause appears to be the increase of irb-tlb from low values (less than 20) to more than >100k, that spike only last for some seconds then everything goes back to normal + +i've upload an screenshot of collectd for one hypervisor here +http://zumbi.com.ar/tmp/irq-tlb.png + + +we have hosts running precise (qemu 1.5, ovs 2.0.2, libvirt 1.2.2 and kernel 3.13) where the issue is frequent. also we have an small % of our fleet running trusty (qemu 2.0.0 ovs 2.0.2 libvirt 1.2.2 and kernel 3.16) where the problem seemed to be nonexistent until today + +issue seems to be isolated to < 10% of our hypervisors, some hypervisors had this problem every few days, others only once or twice. our vm are a black box to us we don't know what users run on them, but mostly cpu and network bound workload. +most of our guests run centos 6.5 (kernel 2.6.32) + +vm are bridged to a linuxbridge then veth wired to an ovs switch (neutron openvswitch agent setup) \ No newline at end of file |