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https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2026-09-17 09:41:09 +02:00
Ian Rogers
2dfc0cab3d
Add metrics for the stat-shadow -d, -dd and -ddd events and hard coded
metrics. Remove the events as these now come from the metrics.
Following this change a detailed perf stat output looks like:
```
$ perf stat -a -ddd -- sleep 1
Performance counter stats for 'system wide':
21,089 context-switches # nan cs/sec cs_per_second
TopdownL1 (cpu_core) # 14.1 % tma_bad_speculation
# 27.3 % tma_frontend_bound (30.56%)
TopdownL1 (cpu_core) # 31.5 % tma_backend_bound
# 27.2 % tma_retiring (30.56%)
6,302 page-faults # nan faults/sec page_faults_per_second
928,495,163 cpu_atom/cpu-cycles/
# nan GHz cycles_frequency (28.41%)
1,841,409,834 cpu_core/cpu-cycles/
# nan GHz cycles_frequency (38.51%)
# 14.5 % tma_bad_speculation
# 16.0 % tma_retiring (28.41%)
# 36.8 % tma_frontend_bound (35.57%)
100,859,118 cpu_atom/branches/ # nan M/sec branch_frequency (42.73%)
572,657,734 cpu_core/branches/ # nan M/sec branch_frequency (54.43%)
1,527 cpu-migrations # nan migrations/sec migrations_per_second
# 32.7 % tma_backend_bound (42.73%)
0.00 msec cpu-clock # 0.000 CPUs utilized
# 0.0 CPUs CPUs_utilized
498,668,509 cpu_atom/instructions/ # 0.57 insn per cycle
# 0.6 instructions insn_per_cycle (42.97%)
3,281,762,225 cpu_core/instructions/ # 1.84 insn per cycle
# 1.8 instructions insn_per_cycle (62.20%)
4,919,511 cpu_atom/branch-misses/ # 5.43% of all branches
# 5.4 % branch_miss_rate (35.80%)
7,431,776 cpu_core/branch-misses/ # 1.39% of all branches
# 1.4 % branch_miss_rate (62.20%)
2,517,007 cpu_atom/LLC-loads/ # 0.1 % llc_miss_rate (28.62%)
3,931,318 cpu_core/LLC-loads/ # 40.4 % llc_miss_rate (45.98%)
14,918,674 cpu_core/L1-dcache-load-misses/ # 2.25% of all L1-dcache accesses
# nan % l1d_miss_rate (37.80%)
27,067,264 cpu_atom/L1-icache-load-misses/ # 15.92% of all L1-icache accesses
# 15.9 % l1i_miss_rate (21.47%)
116,848,994 cpu_atom/dTLB-loads/ # 0.8 % dtlb_miss_rate (21.47%)
764,870,407 cpu_core/dTLB-loads/ # 0.1 % dtlb_miss_rate (15.12%)
1.006181526 seconds time elapsed
```
Signed-off-by: Ian Rogers <irogers@google.com>
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
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.