On Wed, Dec 02, 2015 at 03:42:10PM -0800, Mario Smarduch wrote: > On 12/2/2015 10:07 AM, Christoffer Dall wrote: > > On Wed, Nov 18, 2015 at 06:20:03PM -0800, Mario Smarduch wrote: > >> Also with tick accounting enabled, and periodic timer HZ set to 1000 no irq time > >> is reported. That's with running a ping flood - 1200 int/s, not sure why > >> wouldn't any irq time be reported? The other two modes report irq time as expected. > >> > >> On 11/18/2015 11:46 AM, Mario Smarduch wrote: > >>> Hello, > >>> I noticed sched clock accounting can be enabled when arch-timer is > >>> initialized. But arm64 doesn't appear to have 'HAVE_IRQ_TIME_ACCOUNTING' > >>> selected (as of mainline 4.4-rc1) and IRQ_TIME_ACCOUNTING can't be selected. > >>> After adding it to arch/arm64/Kconfig, option appears to work fine. Depending on > >>> need all accounting options are fine, but irq time accounting appears to be most > >>> preferable. > >>> > >>> Any thoughts? Is it fine to enable it? > >>> > > Is any of this related to KVM? > > Indirectly, given the guest should yield same results. To be on the safe side I > ran the guest in all combinations (7) to confirm that's the case. > > Also verified that guest time on host appears fine in all these configurations. > It takes extra effort to get the guest time as opposed to other modes. I can take this via the arm64 tree (where it's queued, but I've not pushed anything yet). Will _______________________________________________ kvmarm mailing list kvmarm@xxxxxxxxxxxxxxxxxxxxx https://lists.cs.columbia.edu/mailman/listinfo/kvmarm
