From: Dave Hansen <dave.hansen@intel.com>
To: kernel test robot <yi1.lai@intel.com>,
Pawan Gupta <pawan.kumar.gupta@linux.intel.com>
Cc: oe-lkp@lists.linux.dev, lkp@intel.com,
linux-kernel@vger.kernel.org, bpf@vger.kernel.org,
x86@kernel.org, Daniel Borkmann <daniel@iogearbox.net>,
Dave Hansen <dave.hansen@linux.intel.com>
Subject: Re: [linus:master] [x86/bugs] a3af84b0fa: stress-ng.seccomp.ops_per_sec 95.7% regression
Date: Wed, 19 Aug 2026 08:26:53 -0700 [thread overview]
Message-ID: <b771b524-ceca-4766-9eaa-07bee153802a@intel.com> (raw)
In-Reply-To: <202608191340.98574fe2-lkp@intel.com>
On 8/18/26 23:20, kernel test robot wrote:
> kernel test robot noticed a 95.7% regression of stress-ng.seccomp.ops_per_sec on:
One one level this is a "vulnerability mitigations cause performance
loss, news at 11" kind of thing. Like, Duh!
The microbenchmark here does seem to be a pretty worse-case scenario
where it sits in a loop loading and running a seccomp filter program. In
other words, it's just about as pathological of a test as you can have.
I think Pawan had some more ideas about ways to optimize this. Is there
any appetite for that? Or is the test just too synthetic to worry about?
next prev parent reply other threads:[~2026-08-19 15:26 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-08-19 6:20 [linus:master] [x86/bugs] a3af84b0fa: stress-ng.seccomp.ops_per_sec 95.7% regression kernel test robot
2026-08-19 15:26 ` Dave Hansen [this message]
2026-08-19 18:59 ` Pawan Gupta
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