Messages in this thread | | | Date | Wed, 7 Nov 2018 23:24:02 -0800 | From | Davidlohr Bueso <> | Subject | Re: [PATCH] fs/proc: introduce /proc/stat2 file |
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On Thu, 08 Nov 2018, Dave Chinner wrote:
>If only we had percpu counters that had a fixed, extremely low read >overhead that doesn't care about the number of CPUs in the >machine.... > >Oh, wait, we do: percpu_counters.[ch]. > >This all seems like a counter implementation deficiency to me, not >an interface problem...
Yeah fair point, as long as we can sacrifice accuracy by replacing kernel_stat -- or maybe just replace the hard irq stats, which I still think only accounts for 1% of all stat users. I have not looked at how filesystems tune the batch size, but it would certainly be worth looking into methinks.
Thanks, Davidlohr
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