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Linux kernel source tree
a745c0831c
To improve the readability of default events/metrics, sort the evsels
after the Default metric groups have be parsed.
Before:
```
$ perf stat -a sleep 1
Performance counter stats for 'system wide':
22,087 context-switches # nan cs/sec cs_per_second
TopdownL1 (cpu_core) # 10.3 % tma_bad_speculation
# 25.8 % tma_frontend_bound
# 34.5 % tma_backend_bound
# 29.3 % tma_retiring
7,829 page-faults # nan faults/sec page_faults_per_second
880,144,270 cpu_atom/cpu-cycles/ # nan GHz cycles_frequency (50.10%)
1,693,081,235 cpu_core/cpu-cycles/ # nan GHz cycles_frequency
TopdownL1 (cpu_atom) # 20.5 % tma_bad_speculation
# 13.8 % tma_retiring (50.26%)
# 34.6 % tma_frontend_bound (50.23%)
89,326,916 cpu_atom/branches/ # nan M/sec branch_frequency (60.19%)
538,123,088 cpu_core/branches/ # nan M/sec branch_frequency
1,368 cpu-migrations # nan migrations/sec migrations_per_second
# 31.1 % tma_backend_bound (60.19%)
0.00 msec cpu-clock # 0.0 CPUs CPUs_utilized
485,744,856 cpu_atom/instructions/ # 0.6 instructions insn_per_cycle (59.87%)
3,093,112,283 cpu_core/instructions/ # 1.8 instructions insn_per_cycle
4,939,427 cpu_atom/branch-misses/ # 5.0 % branch_miss_rate (49.77%)
7,632,248 cpu_core/branch-misses/ # 1.4 % branch_miss_rate
1.005084693 seconds time elapsed
```
After:
```
$ perf stat -a sleep 1
Performance counter stats for 'system wide':
22,165 context-switches # nan cs/sec cs_per_second
0.00 msec cpu-clock # 0.0 CPUs CPUs_utilized
2,260 cpu-migrations # nan migrations/sec migrations_per_second
20,476 page-faults # nan faults/sec page_faults_per_second
17,052,357 cpu_core/branch-misses/ # 1.5 % branch_miss_rate
1,120,090,590 cpu_core/branches/ # nan M/sec branch_frequency
3,402,892,275 cpu_core/cpu-cycles/ # nan GHz cycles_frequency
6,129,236,701 cpu_core/instructions/ # 1.8 instructions insn_per_cycle
6,159,523 cpu_atom/branch-misses/ # 3.1 % branch_miss_rate (49.86%)
222,158,812 cpu_atom/branches/ # nan M/sec branch_frequency (50.25%)
1,547,610,244 cpu_atom/cpu-cycles/ # nan GHz cycles_frequency (50.40%)
1,304,901,260 cpu_atom/instructions/ # 0.8 instructions insn_per_cycle (50.41%)
TopdownL1 (cpu_core) # 13.7 % tma_bad_speculation
# 23.5 % tma_frontend_bound
# 33.3 % tma_backend_bound
# 29.6 % tma_retiring
TopdownL1 (cpu_atom) # 32.1 % tma_backend_bound (59.65%)
# 30.1 % tma_frontend_bound (59.51%)
# 22.3 % tma_bad_speculation
# 15.5 % tma_retiring (59.53%)
1.008405429 seconds time elapsed
```
Signed-off-by: Ian Rogers <irogers@google.com>
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
|
||
|---|---|---|
| arch | ||
| block | ||
| certs | ||
| crypto | ||
| Documentation | ||
| drivers | ||
| fs | ||
| include | ||
| init | ||
| io_uring | ||
| ipc | ||
| kernel | ||
| lib | ||
| LICENSES | ||
| mm | ||
| net | ||
| rust | ||
| samples | ||
| scripts | ||
| security | ||
| sound | ||
| tools | ||
| usr | ||
| virt | ||
| .clang-format | ||
| .clippy.toml | ||
| .cocciconfig | ||
| .editorconfig | ||
| .get_maintainer.ignore | ||
| .gitattributes | ||
| .gitignore | ||
| .mailmap | ||
| .pylintrc | ||
| .rustfmt.toml | ||
| COPYING | ||
| CREDITS | ||
| Kbuild | ||
| Kconfig | ||
| MAINTAINERS | ||
| 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.