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Fri, 13 Nov 2026 21:01:06 -0800 (PST) Received: from claudebox.iyengar.cloud ([50.39.139.68]) by smtp.gmail.com with ESMTPSA id 41be03b00d2f7-cdded58a9b9sm125917a12.12.2026.11.13.21.01.05 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 13 Nov 2026 21:01:06 -0800 (PST) From: Arun Iyengar To: Detlev Casanova Cc: Mauro Carvalho Chehab , Ezequiel Garcia , Heiko Stuebner , Nicolas Dufresne , hverkuil+cisco@kernel.org, Jonas Karlman , Sven =?utf-8?q?P=C3=BCschel?= , kernel@collabora.com, linux-media@vger.kernel.org, linux-kernel@vger.kernel.org, linux-rockchip@lists.infradead.org, linux-arm-kernel@lists.infradead.org Subject: Re: [PATCH v2 0/5] media: rkvdec: Enable multi-core support In-Reply-To: <20260810-rkvdec-multicore-v2-0-986f89d22cdc@collabora.com> References: <20260810-rkvdec-multicore-v2-0-986f89d22cdc@collabora.com> Date: Sat, 14 Nov 2026 05:01:04 -0000 Message-ID: <179463246494.3611640.18079808669048880957@gmail.com> Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit X-Archived-By: MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20261113_210108_143469_916EE363 X-CRM114-Status: UNSURE ( 9.12 ) X-CRM114-Notice: Please train this message. X-Spam-Score: -1.9 (-) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" X-Spam-Status: No, score=-2.9 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,FREEMAIL_FORGED_FROMDOMAIN, FREEMAIL_FROM,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS autolearn=no autolearn_force=no version=4.0.1 X-Spam-Checker-Version: SpamAssassin 4.0.1 (2024-03-26) on aws-us-west-2-korg-listserv-alma10-1 Hi Detlev, One more data point for this series. On top of it I have one stream decoded on both RK3588 cores at once through the CCU, as the Rockchip BSP does ("soft CCU": each frame goes to the idle core, and the CCU holds back reference reads until the other core has written them). For a single 4K stream that gives HEVC 227 fps instead of 130 and H.264 121 fps instead of 67, bit-exact. It needs two v4l2-mem2mem additions, so that the next job of a context can be scheduled while the previous one is still decoding. I'll post it as an RFC once this series has settled, so it can be rebased on what lands. The code was developed with Claude (Anthropic); I review and test every change. Arun