From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751279AbeBQFte (ORCPT ); Sat, 17 Feb 2018 00:49:34 -0500 Received: from mga02.intel.com ([134.134.136.20]:59982 "EHLO mga02.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751239AbeBQFt2 (ORCPT ); Sat, 17 Feb 2018 00:49:28 -0500 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.46,523,1511856000"; d="scan'208";a="20863419" From: changbin.du@intel.com To: corbet@lwn.net, rostedt@goodmis.org Cc: mingo@kernel.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, Changbin Du Subject: [PATCH 16/17] trace doc: convert trace/intel_th.txt to rst format Date: Sat, 17 Feb 2018 13:39:49 +0800 Message-Id: <1518845990-20733-17-git-send-email-changbin.du@intel.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1518845990-20733-1-git-send-email-changbin.du@intel.com> References: <1518845990-20733-1-git-send-email-changbin.du@intel.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Changbin Du This converts the plain text documentation to reStructuredText format and add it into Sphinx TOC tree. No essential content change. Cc: Steven Rostedt Signed-off-by: Changbin Du --- Documentation/trace/index.rst | 1 + Documentation/trace/{intel_th.txt => intel_th.rst} | 43 +++++++++++----------- 2 files changed, 23 insertions(+), 21 deletions(-) rename Documentation/trace/{intel_th.txt => intel_th.rst} (82%) diff --git a/Documentation/trace/index.rst b/Documentation/trace/index.rst index eabbbaf..02cc56c 100644 --- a/Documentation/trace/index.rst +++ b/Documentation/trace/index.rst @@ -19,3 +19,4 @@ Linux Tracing Technologies events-msr mmiotrace hwlat_detector + intel_th diff --git a/Documentation/trace/intel_th.txt b/Documentation/trace/intel_th.rst similarity index 82% rename from Documentation/trace/intel_th.txt rename to Documentation/trace/intel_th.rst index 7a57165..990f132 100644 --- a/Documentation/trace/intel_th.txt +++ b/Documentation/trace/intel_th.rst @@ -1,3 +1,4 @@ +======================= Intel(R) Trace Hub (TH) ======================= @@ -18,13 +19,13 @@ via sysfs attributes. Currently, the following Intel TH subdevices (blocks) are supported: - Software Trace Hub (STH), trace source, which is a System Trace - Module (STM) device, + Module (STM) device, - Memory Storage Unit (MSU), trace output, which allows storing - trace hub output in system memory, + trace hub output in system memory, - Parallel Trace Interface output (PTI), trace output to an external - debug host via a PTI port, + debug host via a PTI port, - Global Trace Hub (GTH), which is a switch and a central component - of Intel(R) Trace Hub architecture. + of Intel(R) Trace Hub architecture. Common attributes for output devices are described in Documentation/ABI/testing/sysfs-bus-intel_th-output-devices, the most @@ -65,41 +66,41 @@ allocated, are accessible via /dev/intel_th0/msc{0,1}. Quick example ------------- -# figure out which GTH port is the first memory controller: +# figure out which GTH port is the first memory controller:: -$ cat /sys/bus/intel_th/devices/0-msc0/port -0 + $ cat /sys/bus/intel_th/devices/0-msc0/port + 0 -# looks like it's port 0, configure master 33 to send data to port 0: +# looks like it's port 0, configure master 33 to send data to port 0:: -$ echo 0 > /sys/bus/intel_th/devices/0-gth/masters/33 + $ echo 0 > /sys/bus/intel_th/devices/0-gth/masters/33 # allocate a 2-windowed multiblock buffer on the first memory -# controller, each with 64 pages: +# controller, each with 64 pages:: -$ echo multi > /sys/bus/intel_th/devices/0-msc0/mode -$ echo 64,64 > /sys/bus/intel_th/devices/0-msc0/nr_pages + $ echo multi > /sys/bus/intel_th/devices/0-msc0/mode + $ echo 64,64 > /sys/bus/intel_th/devices/0-msc0/nr_pages -# enable wrapping for this controller, too: +# enable wrapping for this controller, too:: -$ echo 1 > /sys/bus/intel_th/devices/0-msc0/wrap + $ echo 1 > /sys/bus/intel_th/devices/0-msc0/wrap -# and enable tracing into this port: +# and enable tracing into this port:: -$ echo 1 > /sys/bus/intel_th/devices/0-msc0/active + $ echo 1 > /sys/bus/intel_th/devices/0-msc0/active # .. send data to master 33, see stm.txt for more details .. # .. wait for traces to pile up .. -# .. and stop the trace: +# .. and stop the trace:: -$ echo 0 > /sys/bus/intel_th/devices/0-msc0/active + $ echo 0 > /sys/bus/intel_th/devices/0-msc0/active -# and now you can collect the trace from the device node: +# and now you can collect the trace from the device node:: -$ cat /dev/intel_th0/msc0 > my_stp_trace + $ cat /dev/intel_th0/msc0 > my_stp_trace Host Debugger Mode -================== +------------------ It is possible to configure the Trace Hub and control its trace capture from a remote debug host, which should be connected via one of -- 2.7.4