linux-kernel - Re: [PATCH v2 seccomp 5/6] selftests/seccomp: Compare bitmap vs filter overhead

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Date:   Thu, 24 Sep 2020 20:35:55 -0500
From:   YiFei Zhu <zhuyifei1999@...il.com>
To:     Kees Cook <keescook@...omium.org>
Cc:     Linux Containers <containers@...ts.linux-foundation.org>,
        YiFei Zhu <yifeifz2@...inois.edu>, bpf <bpf@...r.kernel.org>,
        kernel list <linux-kernel@...r.kernel.org>,
        Aleksa Sarai <cyphar@...har.com>,
        Andrea Arcangeli <aarcange@...hat.com>,
        Andy Lutomirski <luto@...capital.net>,
        Dimitrios Skarlatos <dskarlat@...cmu.edu>,
        Giuseppe Scrivano <gscrivan@...hat.com>,
        Hubertus Franke <frankeh@...ibm.com>,
        Jack Chen <jianyan2@...inois.edu>,
        Jann Horn <jannh@...gle.com>,
        Josep Torrellas <torrella@...inois.edu>,
        Tianyin Xu <tyxu@...inois.edu>,
        Tobin Feldman-Fitzthum <tobin@....com>,
        Tycho Andersen <tycho@...ho.pizza>,
        Valentin Rothberg <vrothber@...hat.com>,
        Will Drewry <wad@...omium.org>
Subject: Re: [PATCH v2 seccomp 5/6] selftests/seccomp: Compare bitmap vs
 filter overhead

On Thu, Sep 24, 2020 at 6:47 PM Kees Cook <keescook@...omium.org> wrote:
> BTW, did this benchmark tool's results match your expectations from what
> you saw with your RFC? (I assume it helped since you've included in
> here.)

Yes, I updated the commit message with the benchmarks of this patch
series. Though, given that I'm running in a qemu-kvm on my laptop that
has a lot of stuffs running on it (and with the cursed ThinkPad T480
CPU throttling), I had to throw much more syscalls at it to pass the
"approximately equals" expectation... though no idea about what's
going on with 732 vs 737.

Or if you mean if I expected these results, yes.

YiFei Zhu