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cd4e1efbbc
Add a PMUs scan that ignores duplicates. When there are multiple PMUs
that differ only by suffix, by default just list the first one and
skip all others. The scan routine checks that the PMU names match but
doesn't enforce that the numbers are consecutive as for some PMUs
there are gaps. If "-v" is passed to "perf list" then list all PMUs.
With the previous change duplicate PMUs are no longer printed but the
suffix of the first is printed. When duplicate PMUs are being skipped
avoid printing the suffix.
Before:
$ perf list
...
uncore_imc_free_running_0/data_read/ [Kernel PMU event]
uncore_imc_free_running_0/data_total/ [Kernel PMU event]
uncore_imc_free_running_0/data_write/ [Kernel PMU event]
uncore_imc_free_running_1/data_read/ [Kernel PMU event]
uncore_imc_free_running_1/data_total/ [Kernel PMU event]
uncore_imc_free_running_1/data_write/ [Kernel PMU event]
After:
$ perf list
...
uncore_imc_free_running/data_read/ [Kernel PMU event]
uncore_imc_free_running/data_total/ [Kernel PMU event]
uncore_imc_free_running/data_write/ [Kernel PMU event]
...
$ perf list -v
uncore_imc_free_running_0/data_read/ [Kernel PMU event]
uncore_imc_free_running_0/data_total/ [Kernel PMU event]
uncore_imc_free_running_0/data_write/ [Kernel PMU event]
uncore_imc_free_running_1/data_read/ [Kernel PMU event]
uncore_imc_free_running_1/data_total/ [Kernel PMU event]
uncore_imc_free_running_1/data_write/ [Kernel PMU event]
...
Reviewed-by: Kan Liang <kan.liang@linux.intel.com>
Signed-off-by: Ian Rogers <irogers@google.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: John Garry <john.g.garry@oracle.com>
Cc: Kajol Jain <kjain@linux.ibm.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>
Link: https://lore.kernel.org/r/20230825135237.921058-3-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.