* Alexander Graf <ag...@suse.de> [2012-01-16 04:57:45]: > Speaking of which - have you benchmarked performance degradation of pv ticket > locks on bare metal?
You mean, run kernel on bare metal with CONFIG_PARAVIRT_SPINLOCKS enabled and compare how it performs with CONFIG_PARAVIRT_SPINLOCKS disabled for some workload(s)? In some sense, the 1x overcommitcase results posted does measure the overhead of (pv-)spinlocks no? We don't see any overhead in that case for atleast kernbench .. > Result for Non PLE machine : > ============================ [snip] > Kernbench: > BASE BASE+patch > %improvement > mean (sd) mean (sd) > Scenario A: > case 1x: 164.233 (16.5506) 163.584 (15.4598 0.39517 [snip] > Result for PLE machine: > ====================== [snip] > Kernbench: > BASE BASE+patch > %improvement > mean (sd) mean (sd) > Scenario A: > case 1x: 161.263 (56.518) 159.635 (40.5621) 1.00953 - vatsa _______________________________________________ Virtualization mailing list Virtualization@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/virtualization
