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Diffstat (limited to 'results/classifier/deepseek-2-tmp/output/network/1470720')
| -rw-r--r-- | results/classifier/deepseek-2-tmp/output/network/1470720 | 17 |
1 files changed, 0 insertions, 17 deletions
diff --git a/results/classifier/deepseek-2-tmp/output/network/1470720 b/results/classifier/deepseek-2-tmp/output/network/1470720 deleted file mode 100644 index 02989925..00000000 --- a/results/classifier/deepseek-2-tmp/output/network/1470720 +++ /dev/null @@ -1,17 +0,0 @@ - -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 |