92637cc729
perf-stat has supported some aggregation modes, such as --per-core,
--per-socket and etc. While for hybrid event, it may only available
on part of cpus. So for --per-core, we need to filter out the
unavailable cores, for --per-socket, filter out the unavailable
sockets, and so on.
Before:
# perf stat --per-core -e cpu_core/cycles/ -a -- sleep 1
Performance counter stats for 'system wide':
S0-D0-C0 2 479,530 cpu_core/cycles/
S0-D0-C4 2 175,007 cpu_core/cycles/
S0-D0-C8 2 166,240 cpu_core/cycles/
S0-D0-C12 2 704,673 cpu_core/cycles/
S0-D0-C16 2 865,835 cpu_core/cycles/
S0-D0-C20 2 2,958,461 cpu_core/cycles/
S0-D0-C24 2 163,988 cpu_core/cycles/
S0-D0-C28 2 164,729 cpu_core/cycles/
S0-D0-C32 0 <not counted> cpu_core/cycles/
S0-D0-C33 0 <not counted> cpu_core/cycles/
S0-D0-C34 0 <not counted> cpu_core/cycles/
S0-D0-C35 0 <not counted> cpu_core/cycles/
S0-D0-C36 0 <not counted> cpu_core/cycles/
S0-D0-C37 0 <not counted> cpu_core/cycles/
S0-D0-C38 0 <not counted> cpu_core/cycles/
S0-D0-C39 0 <not counted> cpu_core/cycles/
1.003597211 seconds time elapsed
After:
# perf stat --per-core -e cpu_core/cycles/ -a -- sleep 1
Performance counter stats for 'system wide':
S0-D0-C0 2 210,428 cpu_core/cycles/
S0-D0-C4 2 444,830 cpu_core/cycles/
S0-D0-C8 2 435,241 cpu_core/cycles/
S0-D0-C12 2 423,976 cpu_core/cycles/
S0-D0-C16 2 859,350 cpu_core/cycles/
S0-D0-C20 2 1,559,589 cpu_core/cycles/
S0-D0-C24 2 163,924 cpu_core/cycles/
S0-D0-C28 2 376,610 cpu_core/cycles/
1.003621290 seconds time elapsed
Signed-off-by: Jin Yao <yao.jin@linux.intel.com>
Co-developed-by: Jiri Olsa <jolsa@redhat.com>
Reviewed-by: Jiri Olsa <jolsa@redhat.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Kan Liang <kan.liang@intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: https://lore.kernel.org/r/20210427070139.25256-16-yao.jin@linux.intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
|
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|---|---|---|
| Documentation | ||
| LICENSES | ||
| arch | ||
| block | ||
| certs | ||
| crypto | ||
| drivers | ||
| fs | ||
| include | ||
| init | ||
| ipc | ||
| kernel | ||
| lib | ||
| mm | ||
| net | ||
| samples | ||
| scripts | ||
| security | ||
| sound | ||
| tools | ||
| usr | ||
| virt | ||
| .clang-format | ||
| .cocciconfig | ||
| .get_maintainer.ignore | ||
| .gitattributes | ||
| .gitignore | ||
| .mailmap | ||
| COPYING | ||
| CREDITS | ||
| Kbuild | ||
| Kconfig | ||
| MAINTAINERS | ||
| Makefile | ||
| README | ||
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.