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9a82a3fd9e
Collect samples using BPF program instead of pulling them from tracefs. If the osnoise:timerlat_sample tracepoint is unavailable or the BPF program fails to load for whatever reason, rtla falls back to the old implementation. The collection of samples using the BPF program is fully self-contained and requires no activity of the userspace part of rtla during the measurement. Thus, rtla only pulls the summary from the BPF map and displays it every second, improving the performance. In --aa-only mode, the BPF program does not collect any data and only signalizes the end of tracing to userspace. An optimization that re-used the main trace instance for auto-analysis in aa-only mode was dropped, as rtla no longer turns tracing on in the main trace instance, making it useless for auto-analysis. Cc: John Kacur <jkacur@redhat.com> Cc: Luis Goncalves <lgoncalv@redhat.com> Cc: Gabriele Monaco <gmonaco@redhat.com> Cc: Clark Williams <williams@redhat.com> Link: https://lore.kernel.org/20250218145859.27762-8-tglozar@redhat.com Signed-off-by: Tomas Glozar <tglozar@redhat.com> Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org> |
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| ipc | ||
| kernel | ||
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| rust | ||
| samples | ||
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| security | ||
| sound | ||
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| usr | ||
| virt | ||
| .clang-format | ||
| .clippy.toml | ||
| .cocciconfig | ||
| .editorconfig | ||
| .get_maintainer.ignore | ||
| .gitattributes | ||
| .gitignore | ||
| .mailmap | ||
| .rustfmt.toml | ||
| COPYING | ||
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| Makefile | ||
| README | ||
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the reStructuredText markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.