From: Daniel Bristot de Oliveira <bristot@kernel.org>
To: linux-kernel@vger.kernel.org, linux-trace-kernel@vger.kernel.org,
Steven Rostedt <rostedt@goodmis.org>
Cc: linux-doc@vger.kernel.org, Juri Lelli <juri.lelli@redhat.com>,
William White <chwhite@redhat.com>,
Daniel Bristot de Oliveira <bristot@kernel.org>,
Masami Hiramatsu <mhiramat@kernel.org>,
Jonathan Corbet <corbet@lwn.net>
Subject: [PATCH V3 11/11] Documentation: Add tools/rtla timerlat -u option documentation
Date: Tue, 6 Jun 2023 18:12:25 +0200 [thread overview]
Message-ID: <bf727c8ccb8f50792200ae620141e047edf4af7a.1686066600.git.bristot@kernel.org> (raw)
In-Reply-To: <cover.1686066600.git.bristot@kernel.org>
Add the -u/--user-thread option documentation for timerlat top/hist.
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Daniel Bristot de Oliveira <bristot@kernel.org>
Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Jonathan Corbet <corbet@lwn.net>
Signed-off-by: Daniel Bristot de Oliveira <bristot@kernel.org>
---
Documentation/tools/rtla/common_timerlat_options.rst | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/Documentation/tools/rtla/common_timerlat_options.rst b/Documentation/tools/rtla/common_timerlat_options.rst
index bacdea6de7a3..88506b397c2d 100644
--- a/Documentation/tools/rtla/common_timerlat_options.rst
+++ b/Documentation/tools/rtla/common_timerlat_options.rst
@@ -26,3 +26,10 @@
Set the /dev/cpu_dma_latency to *us*, aiming to bound exit from idle latencies.
*cyclictest* sets this value to *0* by default, use **--dma-latency** *0* to have
similar results.
+
+**-u**, **--user-threads**
+
+ Set timerlat to run without a workload, and then dispatches user-space workloads
+ to wait on the timerlat_fd. Once the workload is awakes, it goes to sleep again
+ adding so the measurement for the kernel-to-user and user-to-kernel to the tracer
+ output.
--
2.38.1
next prev parent reply other threads:[~2023-06-06 16:13 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-06-06 16:12 [PATCH V3 00/11] rtla improvements Daniel Bristot de Oliveira
2023-06-06 16:12 ` [PATCH V3 01/11] rtla: Add -C cgroup support Daniel Bristot de Oliveira
2023-06-06 16:12 ` [PATCH V3 02/11] rtla: Add --house-keeping option Daniel Bristot de Oliveira
2023-06-12 14:06 ` Masami Hiramatsu
2023-06-12 14:21 ` Daniel Bristot de Oliveira
2023-06-13 20:27 ` Steven Rostedt
2023-06-06 16:12 ` [PATCH V3 03/11] rtla: Change monitored_cpus from char * to cpu_set_t Daniel Bristot de Oliveira
2023-06-06 16:12 ` [PATCH V3 04/11] rtla: Automatically move rtla to a house-keeping cpu Daniel Bristot de Oliveira
2023-06-06 16:12 ` [PATCH V3 05/11] rtla/timerlat: Give timerlat auto analysis its own instance Daniel Bristot de Oliveira
2023-06-06 16:12 ` [PATCH V3 06/11] rtla/timerlat_hist: Add auto-analysis support Daniel Bristot de Oliveira
2023-06-06 16:12 ` [PATCH V3 07/11] rtla: Start the tracers after creating all instances Daniel Bristot de Oliveira
2023-06-06 16:12 ` [PATCH V3 08/11] rtla/hwnoise: Reduce runtime to 75% Daniel Bristot de Oliveira
2023-06-06 16:12 ` [PATCH V3 09/11] rtla/timerlat_top: Add timerlat user-space support Daniel Bristot de Oliveira
2023-06-06 16:12 ` [PATCH V3 10/11] rtla/timerlat_hist: " Daniel Bristot de Oliveira
2023-06-06 16:12 ` Daniel Bristot de Oliveira [this message]
2023-06-12 9:41 ` [PATCH V3 00/11] rtla improvements Juri Lelli
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