From nobody Thu Feb 12 14:10:54 2026 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 0822317FADF for ; Wed, 12 Jun 2024 14:56:07 +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=1718204169; cv=none; b=hlprQF5FpzrWO07ZzFC1uObZrhleAmkOtHb/H/LV+ZllcLQ1JweSXDHITHULL2H/CRF86Y6QOGtIcMvNZIbBW/ZRxoPBAdyR6KAEWIlnKdv/IKMEBVGlMDfOBCx9cTIFkzqhZnmQZj+ZgACfP+2nv7MrG/xJAcvSh6IwDW/GIds= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1718204169; c=relaxed/simple; bh=IIcVdAqmaOW8pjieI7wldk6Uea4Gpi3604HhIUuqmbo=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=GNH2F/trPE+ARMoxmWZFCiiLXT5PRES+lMSTgYETsqUn7hYtH6eeiYyBiduKJsoMjkheseXuhpcyj+PMJ7nkGC5MqIf+Z1fvAoAyLXgmEOC8xo5e2KU3Ew+wSheTORR4L0pyQwTZaAnALYafRy0jyr+MYKiO4Lgl4GRUIIWK/uk= 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=VicfPlrA; 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="VicfPlrA" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1718204167; 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=VicfPlrAvnW08saPlwEVeYevSAcSF91LtNzswnjYginQI/ZXno1VQR/t6SPEp0S9qaPSY8 49cCqpMHRoJJTovLX+uSGXA4RtTWovBQaoSOsmmR8XAvEZe5GFTMPSCMqTYBBIK4GxM7yI 1AsOX0XH39QYThB1todV87EWlVgBpj8= 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-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Scanned-By: MIMEDefang 3.0 on 10.30.177.15 Content-Type: text/plain; charset="utf-8" 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/Documen= tation/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-latenc= y** *0* to have similar results. =20 +**--disable-idle-states** + Set the /sys/devices/system/cpu/cpu/cpuidle/state*/disable file= s to 1 for cpus + that are running timerlat threads to avoid exit from idle latencie= s. On exit from + timerlat, the state*/disable setting is restored to its original v= alue before + running timerlat. + **-k**, **--kernel-threads** =20 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: =20 - libtracefs - libtraceevent + - libcpupower =20 It also depends on python3-docutils to compile man pages. =20 @@ -26,6 +27,9 @@ For development, we suggest the following steps for compi= ling rtla: $ make $ sudo make install $ cd .. + $ cd $libcpupower_src + $ make + $ sudo make install $ cd $rtla_src $ make $ sudo make install --=20 2.43.0