From patchwork Wed Jun 12 14:54:39 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tomas Glozar X-Patchwork-Id: 13695163 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id AE04B1802AF for ; Wed, 12 Jun 2024 14:56:09 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=170.10.133.124 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1718204172; cv=none; b=mZPTVxEg5a0U1ZNenosZDDzZSyPdaCCwS173hk58DdnEV5NKRDRwiLyt3VinyDmRhN+aHh5eM4stJWrw9iCHg2fF6Sl7G8Jq29qRTObn0TNBDIvysNFqqz+6r6KAPnlTUrmORzdSToAwiu0/H2BAKi4tg4NhEZBsmLGWaFYCwrw= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1718204172; c=relaxed/simple; bh=IIcVdAqmaOW8pjieI7wldk6Uea4Gpi3604HhIUuqmbo=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=jDIYNz06PZ9MZ4JavBBJWbS17VXOSp+U877pBL4zbF2ru/IDC0y037qAgBrLtgv13KUsUEOZCPsEzuoeWEeAUCLrcAuRbUO+snpuq6BEAeU3cybIMa1r2vdmg/y7B6gLTIzDsA01sk3IN7kj7AN4bdqIifPHgl6FRE55Np9QT6E= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=redhat.com; spf=pass smtp.mailfrom=redhat.com; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b=KYLhg6aT; arc=none smtp.client-ip=170.10.133.124 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=redhat.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=redhat.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="KYLhg6aT" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1718204168; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=wJUNan0C2AlKgNFgffgh9zDoO6nSF+BoZ31Zaf+PwhE=; b=KYLhg6aT5nEHFYCXOAljOJ2vBOvC21QYSZYDlgXsTMRqSbFCBvXMZevgWZk6RuiWjCfNcY Iq+s38xL/Blkjw4Lobpbo8H71Ekq+kQu/HG7bpkr61rUthbWPQ2vc1D9IENHWoLtdZLZwY K6Xi1rUNudlsSIN4nZocerkasxM3PMM= Received: from mx-prod-mc-04.mail-002.prod.us-west-2.aws.redhat.com (ec2-54-186-198-63.us-west-2.compute.amazonaws.com [54.186.198.63]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-218-DO1enfHbPo-fesQIQwjLBw-1; Wed, 12 Jun 2024 10:56:05 -0400 X-MC-Unique: DO1enfHbPo-fesQIQwjLBw-1 Received: from mx-prod-int-02.mail-002.prod.us-west-2.aws.redhat.com (mx-prod-int-02.mail-002.prod.us-west-2.aws.redhat.com [10.30.177.15]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mx-prod-mc-04.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id 45CFF19560BE; Wed, 12 Jun 2024 14:56:04 +0000 (UTC) Received: from fedora.brq.redhat.com (unknown [10.43.17.68]) by mx-prod-int-02.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTP id 1F19F1954AC0; Wed, 12 Jun 2024 14:56:01 +0000 (UTC) From: tglozar@redhat.com To: bristot@kernel.org, rostedt@goodmis.org Cc: linux-trace-kernel@vger.kernel.org, linux-kernel@vger.kernel.org, jkacur@redhat.com, jwyatt@redhat.com, Tomas Glozar Subject: [PATCH 5/5] rtla: Documentation: Add --disable-idle-states Date: Wed, 12 Jun 2024 16:54:39 +0200 Message-ID: <20240612145439.206990-6-tglozar@redhat.com> In-Reply-To: <20240612145439.206990-1-tglozar@redhat.com> References: <20240612145439.206990-1-tglozar@redhat.com> Precedence: bulk X-Mailing-List: linux-trace-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.0 on 10.30.177.15 From: Tomas Glozar Add --disable-idle-states to manpage and mention libcpupower dependency in README.txt. Signed-off-by: Tomas Glozar --- Documentation/tools/rtla/common_timerlat_options.rst | 6 ++++++ tools/tracing/rtla/README.txt | 4 ++++ 2 files changed, 10 insertions(+) diff --git a/Documentation/tools/rtla/common_timerlat_options.rst b/Documentation/tools/rtla/common_timerlat_options.rst index cef6651f1435..7429e77f95ca 100644 --- a/Documentation/tools/rtla/common_timerlat_options.rst +++ b/Documentation/tools/rtla/common_timerlat_options.rst @@ -31,6 +31,12 @@ *cyclictest* sets this value to *0* by default, use **--dma-latency** *0* to have similar results. +**--disable-idle-states** + Set the /sys/devices/system/cpu/cpu/cpuidle/state*/disable files to 1 for cpus + that are running timerlat threads to avoid exit from idle latencies. On exit from + timerlat, the state*/disable setting is restored to its original value before + running timerlat. + **-k**, **--kernel-threads** Use timerlat kernel-space threads, in contrast of **-u**. diff --git a/tools/tracing/rtla/README.txt b/tools/tracing/rtla/README.txt index 4af3fd40f171..6617b9911c81 100644 --- a/tools/tracing/rtla/README.txt +++ b/tools/tracing/rtla/README.txt @@ -11,6 +11,7 @@ RTLA depends on the following libraries and tools: - libtracefs - libtraceevent + - libcpupower It also depends on python3-docutils to compile man pages. @@ -26,6 +27,9 @@ For development, we suggest the following steps for compiling rtla: $ make $ sudo make install $ cd .. + $ cd $libcpupower_src + $ make + $ sudo make install $ cd $rtla_src $ make $ sudo make install