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 81DCB46C77; Fri, 1 Aug 2025 23:57:51 +0200 (CEST) Received: from mails.dpdk.org (localhost [127.0.0.1]) by mails.dpdk.org (Postfix) with ESMTP id 7208A406BC; Fri, 1 Aug 2025 23:57:51 +0200 (CEST) Received: from mail-yw1-f172.google.com (mail-yw1-f172.google.com [209.85.128.172]) by mails.dpdk.org (Postfix) with ESMTP id 75E6A40A4B for ; Fri, 1 Aug 2025 23:57:50 +0200 (CEST) Received: by mail-yw1-f172.google.com with SMTP id 00721157ae682-71b6703ba32so17290897b3.3 for ; Fri, 01 Aug 2025 14:57:50 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=networkplumber-org.20230601.gappssmtp.com; s=20230601; t=1754085470; x=1754690270; 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=GCP1NzDBOMQBThf4wSdkODcvAlttppPk0LEl909lP3c=; b=xRn2VA9BzypnGx4NJt4IzH6ck0jAKi58e/iy9tG93OJfzsuoQ+Z5GWdYXapn2lo0B7 FY6NDLkB2S3bsJZ+d5EdgO5xXGvbAxGivw/oRNj/WJOUJdCLFQnJBXfnMkxltdbLoCD8 Lthj4l02ksNFzA/I1askCyieXqOgDRBpwNeP5DXpQdbzPrxtYrTPA5iMiLJqGUU4SwWO TGOjBwsWuWrXpnoZv7KrDitfUwcTyTUibjlf/ao/Wyt3oARFGHM16zIZhGagaEvb4MiH klRu42D/7Ad8MxPly1jZPIZxbYIuqxPic44fN//BvghqHqEzGE+s08w7KkRPDae1TSXW FsTA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1754085470; x=1754690270; 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=GCP1NzDBOMQBThf4wSdkODcvAlttppPk0LEl909lP3c=; b=GPNgR58sUp2ZJnzjA4zaa4aG9FUTgPAleQf2l8Nh2VusmaFdLVXkbZbNvas7yT23HQ 75hg9yGd/eV0qiysVrp8v/LXjC41NvitvCCLGRJgIUx84CFDGU5NoLIhr1l+ZEBNNEqI Syc3e+gSEyvlmh3PHwRDv+lwddtF9/aE5BFwnWkPBArC/OfncESKblEWQb0crea5y7fi I4PZdm3yFAPsKFZIuOWCbUBF9S/016RDLDY8fgfVxEtRe9d4zdqlXJVnYqC3XSJQywuC SJdZ75soFuWxrxjihAF0INlCQ3/d/w6D392JNDRO4JZD7I7ld6O9sJIU2frvoqSt4tyf a4gQ== X-Forwarded-Encrypted: i=1; AJvYcCW81EeOxKGs25fCrE6VFiDKv2gm3WvYQziHoVhA6NwZT41Yop6r2BVEA2023NA8WtgW5D8=@dpdk.org X-Gm-Message-State: AOJu0YzBeLIQFMWHPtoWHvyl4GeWeO9ySMT5RUvmGX7z2bhrIEQoXa8i t6APozEAiRJKx3uBbJ+lShcww/ohvp7K6f/wPsFTzmdvwY+H3l4ShVIk9cQc9SozjkY= X-Gm-Gg: ASbGncsbmXmFxBLQ6KHCzCwz8M7fYV3IqWONiyJyrDCFgPXh2jLDWIVMPocTZ6a3JG/ 1H1KsRWhBXZWcOmdXzYBcoiq6N3BbtJwtILUhpEfqhbV0AISMgQ4YLQCKIdicuPfFgp2khxQgAc Uw3wPIMM8ipmJFtE0ZzspB9s9ajF+gVYLUjG8U6AxEBBOhF/ApZqwUNPQcnKSICZUNvCbqTHRlW 3IqPsJiA+cMTZtglz98hKUSL10RY5kDP3iVTsjQE8kVIpfoS3EfqPcgerBBxczkX3TIXKiDz8I8 MeKtytbA1/JcLO1Cwvc361GTxG6vtAf8BsUybMxV1VngIydYVYKzpPOcCuP3TQNlAhtbuN8kyAd yF/7uoGKlRMjn0LOejNPsq0rd63RXYJwQgQvCx2HYdida8/u5Lle4nN1JNPLXSqKD0soxN2dI88 I= X-Google-Smtp-Source: AGHT+IFTyYa0O2gMY/7Z9nsBHqJmm1pW5J5svXlv7UNKIJQtjdN2kfTC05H3PbyFTZ7ptq85Z74njg== X-Received: by 2002:a05:690c:f15:b0:71b:69fd:2571 with SMTP id 00721157ae682-71b7f5bc079mr19454767b3.32.1754085469774; Fri, 01 Aug 2025 14:57:49 -0700 (PDT) Received: from hermes.local (204-195-96-226.wavecable.com. [204.195.96.226]) by smtp.gmail.com with ESMTPSA id 00721157ae682-71b5a5f71e4sm12999057b3.81.2025.08.01.14.57.48 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 01 Aug 2025 14:57:49 -0700 (PDT) Date: Fri, 1 Aug 2025 14:49:51 -0700 From: Stephen Hemminger To: Tomasz Duszynski Cc: Wathsala Vithanage , , , , , , Subject: Re: [PATCH v10 06/10] lib/pmu: do not try enabling perf counter access on arm64 Message-ID: <20250801144926.07a4d97d@hermes.local> In-Reply-To: <20250801102109.3544901-7-tduszynski@marvell.com> References: <20250723044118.2962318-1-tduszynski@marvell.com> <20250801102109.3544901-1-tduszynski@marvell.com> <20250801102109.3544901-7-tduszynski@marvell.com> MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org On Fri, 1 Aug 2025 12:21:05 +0200 Tomasz Duszynski wrote: > /proc/sys/kernel/perf_user_access attribute allow user process to access > perf counters. Though in order to change it binary requires elevated > capabilities or must be run as root. If that's not the case counter > access remains disabled. Hence to avoid confusion log message that > that warns user about that. > > Signed-off-by: Tomasz Duszynski > --- What do Linux perf tools do in this case?