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a=rsa-sha256; c=relaxed/relaxed; d=stgolabs.net; s=dreamhost; t=1677518352; bh=/Zq7yYZW02DEXPDh0jvm5FuZmU/4MNa5LSJgAHpINyg=; h=Date:From:To:Cc:Subject:Content-Type:Content-Transfer-Encoding; b=P4+zFqd18/HpmFmQiEDYB0/3JWYFiZaZ1VOp8YIuBndJB+bBcPRDFJlT9ROk85IeP 2+lhgf9vSf38GIcohoWPqF8tFEU7veK/9o/e1INc67MvfVAyYfkJ1QWhlnrH2eMBsh AjZ7T0DT1SfHleDKzopq4Mt4Pzqv2B91Ueb3OIDo9TOxjr1Ljpf2pVQV+XEIDjz4Kn 8KwNW9VOOqYh5c46TpLJCo8AU4vluDoWFzA7ecV2hZ5McJjMwx9daQzdx2nmiFvMdz bZx1RQMZixHhR+M6YWKyr2nYvIUmvhO44tIu249YE6n0SDXb/zSUGGYKqrnM1euMSU E4YuALYi5otNQ== Date: Mon, 27 Feb 2023 08:50:32 -0800 From: Davidlohr Bueso To: freak07 Subject: Re: [PATCH v3 00/35] Per-VMA locks Message-ID: <20230227165032.taj24j4leu7dlbqc@offworld> Mail-Followup-To: freak07 , surenb@google.com, akpm@linux-foundation.org, arjunroy@google.com, axelrasmussen@google.com, bigeasy@linutronix.de, chriscli@google.com, david@redhat.com, dhowells@redhat.com, edumazet@google.com, gthelen@google.com, gurua@google.com, hannes@cmpxchg.org, hughd@google.com, jannh@google.com, jglisse@google.com, joelaf@google.com, kent.overstreet@linux.dev, kernel-team@android.com, ldufour@linux.ibm.com, leewalsh@google.com, liam.howlett@oracle.com, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, linuxppc-dev@lists.ozlabs.org, lstoakes@gmail.com, luto@kernel.org, mgorman@techsingularity.net, mhocko@suse.com, michel@lespinasse.org, minchan@google.com, mingo@redhat.com, paulmck@kernel.org, peterjung1337@gmail.com, peterx@redhat.com, peterz@infradead.org, posk@google.com, punit.agrawal@bytedance.com, rientjes@google.com, rppt@kernel.org, shakeelb@google.com, soheil@google.com, songliubraving@fb.com, tatashin@google.com, vbabka@suse.cz, will@kernel.org, willy@infradead.org, x86@kernel.org References: <20230216051750.3125598-1-surenb@google.com> <20230224092134.30603-1-michalechner92@googlemail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Disposition: inline Content-Transfer-Encoding: quoted-printable In-Reply-To: <20230224092134.30603-1-michalechner92@googlemail.com> User-Agent: NeoMutt/20220429 X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: joelaf@google.com, michel@lespinasse.org, songliubraving@fb.com, mhocko@suse.com, leewalsh@google.com, david@redhat.com, gurua@google.com, bigeasy@linutronix.de, peterx@redhat.com, dhowells@redhat.com, linux-mm@kvack.org, edumazet@google.com, jglisse@google.com, punit.agrawal@bytedance.com, will@kernel.org, arjunroy@google.com, chriscli@google.com, paulmck@kernel.org, x86@kernel.org, hughd@google.com, willy@infradead.org, peterz@infradead.org, mingo@redhat.com, vbabka@suse.cz, rientjes@google.com, gthelen@google.com, kernel-team@android.com, soheil@google.com, minchan@google.com, jannh@google.com, liam.howlett@oracle.com, shakeelb@google.com, luto@kernel.org, axelrasmussen@google.com, ldufour@linux.ibm.com, surenb@google.com, linux-arm-kernel@lists.infradead.org, posk@google.com, lstoakes@gmail.com, peterjung1337@gmail.com, mgorman@techsingularity.net, kent.overstreet@linux.dev, linux-kernel@vger.kernel.org, hannes@cmpxchg.org, akpm@linux-foundation.org, tatashin@google.com, linu xppc-dev@lists.ozlabs.org, rppt@kernel.org Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" On Fri, 24 Feb 2023, freak07 wrote: >Here are some measurements from a Pixel 7 Pro that=B4s running a kernel ei= ther with the Per-VMA locks patchset or without. >If there=B4s interest I can provide results of other specific apps as well. > >Results are from consecutive cold app launches issued with "am start" comm= and spawning the main activity of Slack Android app. > >https://docs.google.com/spreadsheets/d/1ktujfcyDmIJoQMWsoizGIE-0A_jMS9VMw_= seehUY9s0/edit?usp=3Dsharing > >There=B4s quite a noticeable improvement, as can be seen in the graph. The= results were reproducible. Thanks for sharing. I am not surprised - after all, per-vma locks narrow so= me of the performance gaps between vanilla and speculative pfs, with less complexity (albeit this is n= ow a 35 patch series :). Thanks, Davidlohr