From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mails.dpdk.org (mails.dpdk.org [217.70.189.124]) by inbox.dpdk.org (Postfix) with ESMTP id A138546416 for ; Tue, 18 Mar 2025 22:55:57 +0100 (CET) Received: from mails.dpdk.org (localhost [127.0.0.1]) by mails.dpdk.org (Postfix) with ESMTP id 3D811402E9; Tue, 18 Mar 2025 22:55:57 +0100 (CET) Received: from mail-pl1-f169.google.com (mail-pl1-f169.google.com [209.85.214.169]) by mails.dpdk.org (Postfix) with ESMTP id 64F90402E1 for ; Tue, 18 Mar 2025 22:55:56 +0100 (CET) Received: by mail-pl1-f169.google.com with SMTP id d9443c01a7336-2240b4de12bso24784955ad.2 for ; Tue, 18 Mar 2025 14:55:56 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=networkplumber-org.20230601.gappssmtp.com; s=20230601; t=1742334955; x=1742939755; darn=dpdk.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:subject:cc:to:from:date:from:to:cc:subject:date :message-id:reply-to; bh=UK6RfphwmdFIb82IMF+VZYpAu2A1GPAcLJjTXLpVBBc=; b=UcyOJe99VoyXFtHNVsm6hr7GeSy/ifiPH8Vy0fQ55ZTJLfCn1f84VaS4oaNs5HsuXZ kIThJNRjLh4/rNwFEcs0bIEFMrRHF2imVcmGmg3IQHg84Uv2Jqvt60TUEmiyYhHErUhH gKpzMxfKBC81sYdFpo/GyiEWRqVRjBM+/GXHnd+QNen6XOQc8JX3/0L17U04GXYWyK2S snGXKLFEGetURDrKz8YPWmLbg0CEgxap/ROVTxhtvGM7azm43kApxW/B0D5nkCkP5mNO KtaMnF3j31I0so5idTm9r5CRwQl4jIJoUfX9SCx1CN18DzrBb+bcmtZvkysDpNeppxi5 t1uQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1742334955; x=1742939755; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:subject:cc:to:from:date:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=UK6RfphwmdFIb82IMF+VZYpAu2A1GPAcLJjTXLpVBBc=; b=iB5bzLBczPRqVwJDEmWgnmvWGJ4yg39CKWo/ySCmTA6nHoXDp0hrrLNmK37CYydsJW oOnEA51KJoTe8QgRpr2w6JeRcGm92CLplD66aROhYFIvhi9+MtoTqTPVcDvCw53EiqhW saGgjJvHgz1BMjDXXMUqt8YOKH3MyYxVqAqDxsJK1vtal+MlQvHlzmHdDbR962yshWjK H1gsd+ljj8qEK1tdcI6EPnzfd6GCHww/O9vBzwCkHoDFFm4OMRMp7YjqisDuBVfZh9FN fGKA77G/CCFld2oQHljYsSFY7bnlcON5g5EJcTxXTZHrkR56d09ZWw98tCnnq/sPZSS9 4XUA== X-Gm-Message-State: AOJu0Yz59aEim5wh2ppcdO5T7CCQBfwW91/sATUnp9Vmmm2yZkV0uXzK X2T9qGElSQS48c0Uyfc0f1BWKVzf28D71/UqN8VM2O+vfGPyN6R3WJcNTgqZn2E= X-Gm-Gg: ASbGncuuwGWUnQlCfTaN/mF2Vn7zHPqkgfPClWitSIyUOcIQuA9V/bfwYzElJDMaxO/ xQEq5+T80LWLJuXpfPJDuFxDD6JXIAb7kic4jh2bP4mu8o8OtKkXsnRIf54N0Odu9te4XCt1UF9 /zFh6u5WUjRiyfnt0XgcutwKlcn/2nkhmitQeVXHJedfC4qjFfG4hW3z4WV4Qt6zjzCvxEbz/gh ZgdSWm24q6hERaBU5pU5ARz3qRE+KwTyswQ3WmNymt/LiEdge9c5lZnlVbmzgosJ9zOKy5dEZ/D 7QFLuEn2DXf8bD8JdFacZDg1bagjioV6t3poDk/hxhJAmQKhSuqxUggWBZ4bt44kqqHahdurvil JXs8ONFwj3Fl4XWMghxyu+A== X-Google-Smtp-Source: AGHT+IEkLaoEzfvlZP4iMNvUNE7ZzUcv9GVZJUNfIbU0jB0B7TveHGOp8vD0SiJKVE5uVT5F52rRtw== X-Received: by 2002:a17:902:d58c:b0:224:1ef:1e00 with SMTP id d9443c01a7336-22649927efemr5004845ad.19.1742334955310; Tue, 18 Mar 2025 14:55:55 -0700 (PDT) Received: from hermes.local (204-195-96-226.wavecable.com. [204.195.96.226]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-225c6ba6d3bsm100306135ad.109.2025.03.18.14.55.54 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 18 Mar 2025 14:55:55 -0700 (PDT) Date: Tue, 18 Mar 2025 14:55:52 -0700 From: Stephen Hemminger To: Antonio Di Bacco Cc: users@dpdk.org Subject: Re: Can I use main lcore as a worker core? Message-ID: <20250318145552.5db8cc38@hermes.local> In-Reply-To: References: MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-BeenThere: users@dpdk.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: DPDK usage discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: users-bounces@dpdk.org On Tue, 18 Mar 2025 15:38:31 +0100 Antonio Di Bacco wrote: > When I instantiate a process with 4 cores, I have 3 worker cores and > one main lcore. > > I'm wasting an isolated core (the main lcore) to do nothing. > > I want to overcome this and use also the main lcore. > > Best regards, > Anna. It is often useful to main lcore on non-isolated CPU and have it available for application control tasks. I.e Don't use it for polling instead block on epoll etc.