[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] [PATCH] perfc: count number of explicit vcpu yields
On Mon, 2015-11-09 at 15:23 +0000, Ian Campbell wrote: > On Mon, 2015-11-09 at 16:14 +0100, Dario Faggioli wrote: > > > > > As far as xl accessibility --- doesn't xenperf already read them > > > out? > > > > > Mmm... ISTR having tried without much luck, and having heard that > > it > > wasn't functional any longer, but maybe I'm confusing it with > > something > > else. I'll try again. > > I happened to have an xterm with this in its scroll buffer from > earlier: > > root@marilith-n0:~# xenperf > invalid hypercalls T= 0 0 > 0 0 0 > trap: wfi T= 85068 56068 > 11762 8461 8777 > trap: wfe T= 2811 614 > 716 964 517 > trap: cp15 32-bit access T= 4 1 > 1 1 1 > trap: cp15 64-bit access T= 0 0 > 0 0 0 > trap: cp14 32-bit access T= 0 0 > 0 0 0 > trap: cp14 64-bit access T= 0 0 > 0 0 0 > trap: cp14 dbg access T= 0 0 > 0 0 0 > trap: cp access T= 0 0 > 0 0 0 > trap: 32-bit smc T= 0 0 > 0 0 0 > trap: 32-bit hvc T= 1291 510 > 568 161 52 > trap: guest instr abort T= 0 0 > 0 0 0 > trap: guest data abort T= 16446 6885 > 4358 3431 1772 > trap: condition failed T= 0 0 > 0 0 0 > [...] > > So I think it works. > Ok, thanks for the confirmation, and sorry for the noise then. > You need to build the hypervisor binary with perfc=y (and optionally > perfc_arrays=y) or it doesn't do anything. > Yeah, that I knew. Thanks again and Regards, Dario -- <<This happens because I choose it to happen!>> (Raistlin Majere) ----------------------------------------------------------------- Dario Faggioli, Ph.D, http://about.me/dario.faggioli Senior Software Engineer, Citrix Systems R&D Ltd., Cambridge (UK) Attachment:
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