Re: What is the performance when using frame pointers in thekernel?

[Justin Piszcz]

On Fri, 4 Dec 2009, Jiri Kosina wrote:

> On Thu, 3 Dec 2009, Peter Zijlstra wrote:
>
> > > What is the performance hit when the kernel is compiled with frame
> > > pointers?
> >
> > build both kernels and run your favourite workload to find out.
>
> But generally speaking, frame pointers impose quite some performance
> penalty indeed. lmbench syscall microbenchmark can give you some hint. I
> expect you'll see approx. 10% performance increase for various syscalls if
> you disable them, as that's what we have measured lately.
>
> --
> Jiri Kosina
> SUSE Labs, Novell Inc.

Thanks for the response.. Good to know.

Justin.
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/