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[82.131.69.225]) by smtp.googlemail.com with ESMTPSA id 2adb3069b0e04-5bfb027d0a2sm30503e87.36.2026.10.22.12.55.18 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 22 Oct 2026 12:55:18 -0700 (PDT) From: Indrek Kruusa To: Wilken Gottwalt Cc: Nguyen Minh Tien , Bjorn Andersson , Chen-Yu Tsai , Jernej Skrabec , Samuel Holland , linux-remoteproc@vger.kernel.org, linux-sunxi@lists.linux.dev, linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH 0/3] hwspinlock: sun6i: Allwinner D1 and T113 support Date: Thu, 22 Oct 2026 22:54:26 +0300 Message-ID: <20261022195447.2007440-1-indrek.kruusa@gmail.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20261022211952.7293f8b6@posteo.net> References: <20260927025626.69614-1-tien.nguyenminh@embeddedlinux.blog> <20261022190203.1998156-1-indrek.kruusa@gmail.com> <20261022211952.7293f8b6@posteo.net> X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Hi Wilken, I observed something like a 4.5x slowdown - around 12 us per take/free on the C906: the loop with the lock runs at ~14.7 us/iteration, the same loop without it at ~3.3 us. So yes, the effect is material. Greetings, Indrek