From: Vincent Donnefort <vdonnefort@google.com>
To: rostedt@goodmis.org, mhiramat@kernel.org,
linux-trace-kernel@vger.kernel.org
Cc: mathieu.desnoyers@efficios.com, kernel-team@android.com,
linux-kernel@vger.kernel.org,
Vincent Donnefort <vdonnefort@google.com>
Subject: [PATCH 2/2] tracing/histograms: Drop stale absolute timestamp note from docs
Date: Thu, 5 Nov 2026 20:28:14 +0000 [thread overview]
Message-ID: <20261105202814.1350312-3-vdonnefort@google.com> (raw)
In-Reply-To: <20261105202814.1350312-1-vdonnefort@google.com>
Since commit b94bc80df648 ("tracing: Use a no_filter_buffering_ref to
stop using the filter buffer") stopped using absolute timestamp for the
histograms, the paragraph about timestamps has been stale. Update it.
Signed-off-by: Vincent Donnefort <vdonnefort@google.com>
---
Documentation/trace/histogram.rst | 11 +++++------
1 file changed, 5 insertions(+), 6 deletions(-)
diff --git a/Documentation/trace/histogram.rst b/Documentation/trace/histogram.rst
index 97b67f05f5ea..9b301b86a4df 100644
--- a/Documentation/trace/histogram.rst
+++ b/Documentation/trace/histogram.rst
@@ -1676,12 +1676,11 @@ features have been added to the hist trigger support:
A note on inter-event timestamps: If common_timestamp is used in a
histogram, the trace buffer is automatically switched over to using
-absolute timestamps and the "global" trace clock, in order to avoid
-bogus timestamp differences with other clocks that aren't coherent
-across CPUs. This can be overridden by specifying one of the other
-trace clocks instead, using the "clock=XXX" hist trigger attribute,
-where XXX is any of the clocks listed in the tracing/trace_clock
-pseudo-file.
+the "global" trace clock, in order to avoid bogus timestamp
+differences with other clocks that aren't coherent across CPUs. This
+can be overridden by specifying one of the other trace clocks instead,
+using the "clock=XXX" hist trigger attribute, where XXX is any of the
+clocks listed in the tracing/trace_clock pseudo-file.
These features are described in more detail in the following sections.
--
2.56.0.455.g6c5a503b38-goog
prev parent reply other threads:[~2026-11-05 20:28 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-11-05 20:28 [PATCH 0/2] ring-buffer: Remove unused absolute timestamp mode Vincent Donnefort
2026-11-05 20:28 ` [PATCH 1/2] " Vincent Donnefort
2026-11-05 20:28 ` Vincent Donnefort [this message]
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20261105202814.1350312-3-vdonnefort@google.com \
--to=vdonnefort@google.com \
--cc=kernel-team@android.com \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-trace-kernel@vger.kernel.org \
--cc=mathieu.desnoyers@efficios.com \
--cc=mhiramat@kernel.org \
--cc=rostedt@goodmis.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox
all inboxes | Powered by JetHome®