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146edff3d7
Skip an event configuration for event names with a dash/minus in them. Events with a dash/minus in their name cause parsing issues as legacy encoding of events would use a dash/minus as a separator. The parser separates events with dashes into prefixes and suffixes and then recombines them. Unfortunately if an event has part of its name that matches a legacy token then the recombining fails. This is seen for branch-brs where branch is a legacy token. branch-brs was introduced to sysfs in: https://lore.kernel.org/all/20220322221517.2510440-5-eranian@google.com/ The failure is shown below as well as the workaround to use a config where the dash/minus isn't treated specially: ``` $ perf stat -e branch-brs true event syntax error: 'branch-brs' \___ parser error $ perf stat -e cpu/branch-brs/ true Performance counter stats for 'true': 46,179 cpu/branch-brs/ ``` Signed-off-by: Ian Rogers <irogers@google.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: John Garry <john.garry@huawei.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Ravi Bangoria <ravi.bangoria@amd.com> Cc: Stephane Eranian <eranian@google.com> Link: http://lore.kernel.org/lkml/20221013011205.3151391-1-irogers@google.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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.