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Wed, 31 Aug 2022 05:45:06 -0400 (EDT) X-Mailer: MessagingEngine.com Webmail Interface User-Agent: Cyrus-JMAP/3.7.0-alpha0-841-g7899e99a45-fm-20220811.002-g7899e99a Mime-Version: 1.0 Message-Id: <3bfad27a-caf0-49e2-94a9-e65943cdaaaf@www.fastmail.com> In-Reply-To: <20220831041731.3836322-1-yuzhao@google.com> References: <20220815071332.627393-1-yuzhao@google.com> <20220831041731.3836322-1-yuzhao@google.com> Date: Wed, 31 Aug 2022 11:44:10 +0200 From: "Arnd Bergmann" To: linux-arm-kernel@lists.infradead.org Subject: Re: OpenWrt / MIPS benchmark with MGLRU X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220831_024514_916043_312293E8 X-CRM114-Status: GOOD ( 12.78 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Wed, Aug 31, 2022, at 6:17 AM, Yu Zhao wrote: > > Rational > ======== > 1. OpenWrt is the most popular distro for WiFi routers; many of its > targets use big endianness [1]. > 2. 4 out of the top 5 bestselling WiFi routers in the US use MIPS [2]; > MIPS uses software-managed TLB. > 3. Memcached is the best available memory benchmark on OpenWrt; > admittedly such a use case is very limited in the real world. > > Hardware > ======== > DUT: Ubiquiti EdgeRouter (ER-8) [3] I don't know if it makes any difference to your findings, but I would point out the test hardware is neither representative of most devices supported by OpenWRT, nor those on the amazon best-seller list that I see looking from Germany: Five of the top-10 devices on that list are arm64 (little-endian, hardware TLB walker, typically 512MB of RAM), the others are mips32 (typically only 128MB, mostly single-core) and only the oldest one (Archer C7) of them is big-endian. I would not expect endianness to make any difference, but the 16x smaller memory of typical mips devices (ath79, mt76) might. Arnd _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel