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[209.85.222.46]) by smtp.gmail.com with ESMTPSA id m18sm504vkp.37.2021.07.29.17.07.10 for (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 29 Jul 2021 17:07:11 -0700 (PDT) Received: by mail-ua1-f46.google.com with SMTP id 105so3259941uac.7 for ; Thu, 29 Jul 2021 17:07:10 -0700 (PDT) X-Received: by 2002:a9f:238b:: with SMTP id 11mr7438420uao.91.1627603630500; Thu, 29 Jul 2021 17:07:10 -0700 (PDT) MIME-Version: 1.0 References: In-Reply-To: From: Doug Anderson Date: Thu, 29 Jul 2021 17:06:59 -0700 X-Gmail-Original-Message-ID: Message-ID: Subject: Re: [PATCH v2 00/24] iommu: Refactor DMA domain strictness To: Robin Murphy Cc: Joerg Roedel , Will Deacon , "list@263.net:IOMMU DRIVERS , Joerg Roedel , " , Linux ARM , LKML , suravee.suthikulpanit@amd.com, Lu Baolu , John Garry , Marek Szyprowski , Yoshihiro Shimoda , Geert Uytterhoeven , Yong Wu , Heiko Stuebner , Chunyan Zhang , Maxime Ripard , Jean-Philippe Brucker X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210729_170713_880418_5DD300FB X-CRM114-Status: GOOD ( 12.12 ) 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 Hi, On Thu, Jul 29, 2021 at 3:33 PM Doug Anderson wrote: > > I was definitely getting some inconsistencies in my tests where the > eMMC speeds were getting into a bad state, but I don't believe it's > related to your patch series. I think this was just me being an idiot. I forgot that I'd been running with KASAN, so that explains why my speeds were so much slower than usual and probably also explains how it could get in a bad state (I guess it also explains why sugov was eating up 30% of my CPU time since that went away too!). No mystery here aside from why it took me this long to realize it. I'm now getting ~213 MB/s without forcing it to lazy and ~261 MB/s with forcing it to lazy through sysfs (and without any other cpufreq hacks). -Doug _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel