On Thu, 10 May 2007, Andi Kleen wrote:
> Davide Libenzi <[email protected]> writes:
>
> > This patch serie introduces a way to log high frequency/volume data
> > out of the kernel. Logging scheduler operations for example, with
> > loads that generate tenths of thousands of context switches per second
> > (possibly from multiple CPUs), can overload the kernel printk. Also,
> > logging in binary form helps in reducing the size of the logged data
> > that is tranfered from kernel to userspace. The kmon logger uses per
> > CPU buffers (rings) that are flushed at a given frequency to all the
> > instances of the kmon devices.
>
> Sounds like you reinvented relayfs? (and ktrace before that)
I simply didn't know about relayfs ;) Randy told me when I posted
those, that BTW were never intended for merging. The buffering method used
is more similar to oprofile though.
- Davide
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