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Mon, 17 Aug 2026 07:54:38 -0700 (PDT) Date: Mon, 17 Aug 2026 16:54:36 +0200 From: Michal =?utf-8?Q?Koutn=C3=BD?= To: shisiyuan Cc: Johannes Weiner , Suren Baghdasaryan , Tejun Heo , Ingo Molnar , Juri Lelli , Vincent Guittot , Jonathan Corbet , Shuah Khan , Peter Zijlstra , Dietmar Eggemann , Steven Rostedt , Ben Segall , Mel Gorman , Valentin Schneider , K Prateek Nayak , linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, cgroups@vger.kernel.org, shisiyuan Subject: Re: [PATCH] sched/psi: add cpu_prio pressure metric for high-priority task stalls Message-ID: References: <20260811104610.100617-1-shisiyuan19870131@gmail.com> Precedence: bulk X-Mailing-List: linux-doc@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha512; protocol="application/pgp-signature"; boundary="qu27gvil7scj6yvu" Content-Disposition: inline In-Reply-To: <20260811104610.100617-1-shisiyuan19870131@gmail.com> --qu27gvil7scj6yvu Content-Type: text/plain; protected-headers=v1; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable Subject: Re: [PATCH] sched/psi: add cpu_prio pressure metric for high-priority task stalls MIME-Version: 1.0 Hello. On Tue, Aug 11, 2026 at 06:46:10PM +0800, shisiyuan wrote: > From: shisiyuan >=20 > Introduce a new PSI (Pressure Stall Information) indicator that > measures how much walltime priority-sensitive tasks spend waiting > for CPU, exposed as /proc/pressure/cpu_prio alongside the existing > io/memory/cpu/irq metrics. You can "just" put the priority-sensitive tasks into a cgroup (no cpu controller needed) and track the per-cgroup PSI values. HTH, Michal --qu27gvil7scj6yvu Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iJEEABYKADkWIQRCE24Fn/AcRjnLivR+PQLnlNv4CAUCaoMghhsUgAAAAAAEAA5t YW51MiwyLjUrMS4xMiwyLDIACgkQfj0C55Tb+AjpSwD+NKU2R01cwLlTMNBxrtTc +P6kokVooPs1htIXqDBrC6YA/1vu0Ia8h9JHA9xofNvUo55BtiT7X1siVWbcVXPQ WWUL =A4KP -----END PGP SIGNATURE----- --qu27gvil7scj6yvu--