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e8c1167606
It's confusing which one is effective when the both options are given. The current code happens to use -c in this case but users might not be aware of it. We can change it to complain about that instead of relying on the implicit priority. Before: $ perf record -c 111111 -F 99 true [ perf record: Woken up 1 times to write data ] [ perf record: Captured and wrote 0.031 MB perf.data (8 samples) ] $ perf evlist -F cycles: sample_period=111111 $ After: $ perf record -c 111111 -F 99 true cannot set frequency and period at the same time $ So this change can break existing usages, but I think it's rare to have both options and it'd be better changing them. Suggested-by: Alexey Alexandrov <aalexand@google.com> Signed-off-by: Namhyung Kim <namhyung@kernel.org> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Ian Rogers <irogers@google.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lore.kernel.org/lkml/20210402094020.28164-1-namhyung@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
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drivers | ||
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kernel | ||
lib | ||
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mm | ||
net | ||
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usr | ||
virt | ||
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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 Restructured Text 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.