Hi Stefan, This morning we had to reboot the guest system again. pidstat logging was not enabled on the host (planned to do that later, hate myself for that). Again it looks like the schedulerinside the guest just does not want to schedule anymore (or takes coffee breaksinbetween), because tasks are piling up in the queue. Info from guest (load at that time 28.88): procs -----------memory---------- ---swap-- -----io---- -system-- ----cpu---- r b swpd free buff cache si so bi bo in cs us sy id wa 43 0 0 129684 56 25702740 0 0 399 58 9 167 16 11 72 1 52 0 0 115632 56 25706964 0 0 85 1118 1091 1225 74 26 0 0 59 0 0 150380 56 25692648 0 0 122 681 1135 1283 73 27 0 0 47 0 0 135424 56 25699504 0 0 79 415 1076 1064 74 26 0 0 49 0 0 132420 56 25705604 0 0 130 551 1113 1083 74 26 0 0 Again, there is no apparent reason why the load should be that high. It just spikes up until we finally put the guest out of its misery (5 minutes before the load went up to 28.88 it was at 2.68 (normal for that time of day). We did not wait until we ended up at >70, because the system was actively used at that time. Shutdown occured when load was at 35). There was no unusual workload and during normal operation the load on the system at that time of day is (reproducible) between 2 and 4. Info from host (same time, load on host 6.32 w/ 7 cores assigned to the guest): kvm_stat: efer_reload 0 0 exits 2549659797 106703 fpu_reload 18554960 630 halt_exits 33754341 230 halt_wakeup 17080387 188 host_state_reload 91193250 2016 hypercalls 0 0 insn_emulation 99324537 2569 insn_emulation_fail 0 0 invlpg 0 0 io_exits 51338365 1097 irq_exits 82789640 6115 irq_injections 53016628 1494 irq_window 1240060 70 largepages 10937 701 mmio_exits 4443644 72 mmu_cache_miss 409801870 21168 mmu_flooded 0 0 mmu_pde_zapped 0 0 mmu_pte_updated 0 0 mmu_pte_write 108123 0 mmu_recycled 0 0 mmu_shadow_zapped 411841775 18928 mmu_unsync 0 0 nmi_injections 0 0 nmi_window 0 0 pf_fixed 2248004983 95456 pf_guest 0 0 remote_tlb_flush 35279973 4976 request_irq 0 0 signal_exits 0 0 tlb_flush 0 0 vmstat 5 5: procs -----------memory---------- ---swap-- -----io---- --system-- -----cpu----- r b swpd free buff cache si so bi bo in cs us sy id wa st 7 0 0 4442088 160968 2382804 0 0 251 115 3 1 9 6 85 0 0 7 0 0 4459008 160968 2382804 0 0 497 1021 11254 3502 6 84 10 0 0 7 0 0 4431464 160968 2382804 0 0 372 1054 10286 2753 6 83 11 0 0 7 0 0 4437076 160972 2382804 0 0 552 1710 12890 4518 7 82 10 0 0 8 0 0 4438508 160972 2382804 0 0 174 1736 10398 3092 5 84 10 0 0 Best regards, Martin -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
