Messages in this thread | | | Date | Sat, 22 Mar 2014 10:57:28 -0400 | From | Rik van Riel <> | Subject | Re: [BUG] Paravirtual time accounting / IRQ time accounting |
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On 03/22/2014 03:15 AM, lwcheng@cs.hku.hk wrote:
> I observe that sometimes irq_time only includes "part" of steal_time. > > Like you said, irq_time is in dozens-of-microseconds. In VMs, as all > devices seen are virtual ones, irq_time seems to be not as desired > as it is in physical hosts. > > A quick (but not radical) solution may be: > disable CONFIG_IRQ_TIME_ACCOUNTING if CONFIG_PARAVIRT is selected. > Just adopt tick-based accounting: CONFIG_TICK_CPU_ACCOUNTING > > I am thinking what irq_time really *means* in VMs.
That is not really an option for Linux distributions, which tend to run the same kernel image on the host and in the guest...
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