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gprofng: 31123 improvements to hardware event implementation

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Our hardware counter profiling is based on perf_event_open().
Our HWC tables are absent for new machines.
I have added HWC tables for the following events: PERF_TYPE_HARDWARE,
PERF_TYPE_SOFTWARE, PERF_TYPE_HW_CACHE. Other events require additional fixes.

Did a little cleaning: marked the symbols as static, used Stringbuilder,
created a function to read /proc/cpuinfo.

gprofng/ChangeLog
2024-01-08  Vladimir Mezentsev  <vladimir.mezentsev@oracle.com>

	PR gprofng/31123
	* common/core_pcbe.c: Mark the symbols as static. Add events_generic[].
	* common/hwc_cpus.h: Declare a new function read_cpuinfo.
	* common/hwcdrv.c: Add a new parameter in init_perf_event().
	* common/hwcentry.h: Add use_perf_event_type in Hwcentry.
	* common/hwcfuncs.c (process_data_descriptor): Read use_perf_event_type,
	type, config.
	* common/hwctable.c: Add a new HWC table generic_list[].
	* common/opteron_pcbe.c (opt_pcbe_init): Accept AMD machines.
	* src/collctrl.cc: Use StringBuilder in Coll_Ctrl::build_data_desc().
	Add a new function read_cpuinfo.
This commit is contained in:
Vladimir Mezentsev
2024-01-08 22:00:24 -08:00
parent e1cab50d2d
commit 8fe04eeb2c
8 changed files with 293 additions and 247 deletions
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5
gprofng/common/hwcentry.h
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@@ -112,11 +112,12 @@ extern "C"
int timecvt; /* multiplier to convert metric to time, 0 if N/A */
ABST_type memop; /* type of backtracking allowed */
char *short_desc; /* optional one-liner description, or NULL */
int type; /* Type of perf_event_attr */
long long config; /* perf_event_type -specific configuration */
/* the fields above this line are expected, in order, by the tables in hwctable.c */
/* ================================================== */
/* the fields below this line are more flexible */
unsigned int use_perf_event_type : 16; /* Set 1 to use two fields below */
unsigned int type : 16; /* Type of perf_event_attr */
long long config; /* perf_event_type -specific configuration */
int sort_order; /* "tag" to associate experiment record with HWC def */
regno_t *reg_list; /* if not NULL, legal values for <reg_num> field above */
/* Note: reg_list will be terminated by REGNO_ANY */