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Linux kernel source tree
abcff00014
Add the PMU terms legacy-hardware-config and
legacy-cache-config. These terms are similar to the config term in
that their values are assigned to the perf_event_attr config
value. They differ in that the PMU type is switched to be either
PERF_TYPE_HARDWARE or PERF_TYPE_HW_CACHE, and the PMU type is moved
into the extended type information of the config value. This will
allow later patches to add legacy events to json.
An example use of the terms is in the following:
```
$ perf stat -vv -e 'cpu/legacy-hardware-config=1/,cpu/legacy-cache-config=0x10001/' true
Using CPUID GenuineIntel-6-8D-1
Attempt to add: cpu/legacy-hardware-config=0x1/
..after resolving event: cpu/legacy-hardware-config=0x1/
Attempt to add: cpu/legacy-cache-config=0x10001/
..after resolving event: cpu/legacy-cache-config=0x10001/
Control descriptor is not initialized
------------------------------------------------------------
perf_event_attr:
type 0 (PERF_TYPE_HARDWARE)
size 136
config 0x1 (PERF_COUNT_HW_INSTRUCTIONS)
sample_type IDENTIFIER
read_format TOTAL_TIME_ENABLED|TOTAL_TIME_RUNNING
disabled 1
inherit 1
enable_on_exec 1
------------------------------------------------------------
sys_perf_event_open: pid 994937 cpu -1 group_fd -1 flags 0x8 = 3
------------------------------------------------------------
perf_event_attr:
type 3 (PERF_TYPE_HW_CACHE)
size 136
config 0x10001 (PERF_COUNT_HW_CACHE_RESULT_MISS | PERF_COUNT_HW_CACHE_OP_READ | PERF_COUNT_HW_CACHE_L1I)
sample_type IDENTIFIER
read_format TOTAL_TIME_ENABLED|TOTAL_TIME_RUNNING
disabled 1
inherit 1
enable_on_exec 1
------------------------------------------------------------
sys_perf_event_open: pid 994937 cpu -1 group_fd -1 flags 0x8 = 4
cpu/legacy-hardware-config=1/: -1: 1364046 414756 414756
cpu/legacy-cache-config=0x10001/: -1: 57453 414756 414756
cpu/legacy-hardware-config=1/: 1364046 414756 414756
cpu/legacy-cache-config=0x10001/: 57453 414756 414756
Performance counter stats for 'true':
1,364,046 cpu/legacy-hardware-config=1/
57,453 cpu/legacy-cache-config=0x10001/
0.001988593 seconds time elapsed
0.002194000 seconds user
0.000000000 seconds sys
```
Tested-by: Thomas Richter <tmricht@linux.ibm.com>
Signed-off-by: Ian Rogers <irogers@google.com>
Tested-by: James Clark <james.clark@linaro.org>
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
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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.