netdev - Re: [PATCH bpf-next 10/10] selftests/bpf: support stat filtering in comparison mode in veristat

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Date:   Thu, 3 Nov 2022 09:46:19 -0700
From:   Alexei Starovoitov <ast@...a.com>
To:     Andrii Nakryiko <andrii@...nel.org>, bpf@...r.kernel.org,
        ast@...nel.org, daniel@...earbox.net, netdev@...r.kernel.org,
        kuba@...nel.org
Cc:     kernel-team@...com
Subject: Re: [PATCH bpf-next 10/10] selftests/bpf: support stat filtering in
 comparison mode in veristat

On 11/2/22 10:53 PM, Andrii Nakryiko wrote:
> Finally add support for filtering stats values, similar to
> non-comparison mode filtering. For comparison mode 4 variants of stats
> are important for filtering, as they allow to filter either A or B side,
> but even more importantly they allow to filter based on value
> difference, and for verdict stat value difference is MATCH/MISMATCH
> classification. So with these changes it's finally possible to easily
> check if there were any mismatches between failure/success outcomes on
> two separate data sets. Like in an example below:
> 
>    $ ./veristat -e file,prog,verdict,insns -C ~/baseline-results.csv ~/shortest-results.csv -f verdict_diff=mismatch

All these improvements to veristat look great.
What is the way to do negative filter ?
In other words what is the way to avoid using " | grep -v '+0' " ?