From: Dave Hansen <dave.hansen@intel.com>
To: Chengfeng Lin <lin2530632123@gmail.com>,
Pawan Gupta <pawan.kumar.gupta@linux.intel.com>,
Dave Hansen <dave.hansen@linux.intel.com>,
Daniel Borkmann <daniel@iogearbox.net>
Cc: x86@kernel.org, bpf@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [linus:master] [x86/bugs] a3af84b0fa: stress-ng.seccomp.ops_per_sec 95.7% regression
Date: Tue, 3 Nov 2026 07:23:37 -0800 [thread overview]
Message-ID: <99b9d530-d962-4739-8f6e-83ee5c0e18a2@intel.com> (raw)
In-Reply-To: <179361623876.3.16264907931792312619.redis-ibpb-report@gmail.com>
On 11/2/26 02:43, Chengfeng Lin wrote:
> I found another workload affected by a3af84b0fa00 while running MMTests:
> Redis ZPOPMIN throughput on v7.3 is about 13% lower than on v7.1.3.
> Unlike the repeated filter loading discussed here, the slowdown remains
> after the tasks that triggered the predictor flush (IBPB) have exited.
> Can this cost be reduced while preserving the security protection?
I'm puzzled by this result. Any chance you could collect some profiles
and see where the difference is?
prev parent reply other threads:[~2026-11-03 15:23 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-08-19 6:20 kernel test robot
2026-08-19 15:26 ` Dave Hansen
2026-08-19 18:59 ` Pawan Gupta
2026-11-02 10:43 ` Chengfeng Lin
2026-11-02 19:31 ` Pawan Gupta
2026-11-03 15:23 ` Dave Hansen [this message]
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=99b9d530-d962-4739-8f6e-83ee5c0e18a2@intel.com \
--to=dave.hansen@intel.com \
--cc=bpf@vger.kernel.org \
--cc=daniel@iogearbox.net \
--cc=dave.hansen@linux.intel.com \
--cc=lin2530632123@gmail.com \
--cc=linux-kernel@vger.kernel.org \
--cc=pawan.kumar.gupta@linux.intel.com \
--cc=x86@kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox
all inboxes | Powered by JetHome®