121 lines
2.9 KiB
C
121 lines
2.9 KiB
C
|
#include <stdbool.h>
|
||
|
|
#include <linux/kernel.h>
|
||
|
|
#include <linux/types.h>
|
||
|
|
#include <linux/bitops.h>
|
||
|
|
#include <linux/log2.h>
|
||
|
|
|
||
|
|
#include "../../util/evlist.h"
|
||
|
|
#include "../../util/auxtrace.h"
|
||
|
|
#include "../../util/evsel.h"
|
||
|
|
|
||
|
|
#define PERF_EVENT_CPUM_SF 0xB0000 /* Event: Basic-sampling */
|
||
|
|
#define PERF_EVENT_CPUM_SF_DIAG 0xBD000 /* Event: Combined-sampling */
|
||
|
|
#define DEFAULT_AUX_PAGES 128
|
||
|
|
#define DEFAULT_FREQ 4000
|
||
|
|
|
||
|
|
static void cpumsf_free(struct auxtrace_record *itr)
|
||
|
|
{
|
||
|
|
free(itr);
|
||
|
|
}
|
||
|
|
|
||
|
|
static size_t cpumsf_info_priv_size(struct auxtrace_record *itr __maybe_unused,
|
||
|
|
struct perf_evlist *evlist __maybe_unused)
|
||
|
|
{
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int
|
||
|
|
cpumsf_info_fill(struct auxtrace_record *itr __maybe_unused,
|
||
|
|
struct perf_session *session __maybe_unused,
|
||
|
|
struct auxtrace_info_event *auxtrace_info __maybe_unused,
|
||
|
|
size_t priv_size __maybe_unused)
|
||
|
|
{
|
||
|
|
auxtrace_info->type = PERF_AUXTRACE_S390_CPUMSF;
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static unsigned long
|
||
|
|
cpumsf_reference(struct auxtrace_record *itr __maybe_unused)
|
||
|
|
{
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int
|
||
|
|
cpumsf_recording_options(struct auxtrace_record *ar __maybe_unused,
|
||
|
|
struct perf_evlist *evlist __maybe_unused,
|
||
|
|
struct record_opts *opts)
|
||
|
|
{
|
||
|
|
unsigned int factor = 1;
|
||
|
|
unsigned int pages;
|
||
|
|
|
||
|
|
opts->full_auxtrace = true;
|
||
|
|
|
||
|
|
/*
|
||
|
|
* The AUX buffer size should be set properly to avoid
|
||
|
|
* overflow of samples if it is not set explicitly.
|
||
|
|
* DEFAULT_AUX_PAGES is an proper size when sampling frequency
|
||
|
|
* is DEFAULT_FREQ. It is expected to hold about 1/2 second
|
||
|
|
* of sampling data. The size used for AUX buffer will scale
|
||
|
|
* according to the specified frequency and DEFAULT_FREQ.
|
||
|
|
*/
|
||
|
|
if (!opts->auxtrace_mmap_pages) {
|
||
|
|
if (opts->user_freq != UINT_MAX)
|
||
|
|
factor = (opts->user_freq + DEFAULT_FREQ
|
||
|
|
- 1) / DEFAULT_FREQ;
|
||
|
|
pages = DEFAULT_AUX_PAGES * factor;
|
||
|
|
opts->auxtrace_mmap_pages = roundup_pow_of_two(pages);
|
||
|
|
}
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int
|
||
|
|
cpumsf_parse_snapshot_options(struct auxtrace_record *itr __maybe_unused,
|
||
|
|
struct record_opts *opts __maybe_unused,
|
||
|
|
const char *str __maybe_unused)
|
||
|
|
{
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* auxtrace_record__init is called when perf record
|
||
|
|
* check if the event really need auxtrace
|
||
|
|
*/
|
||
|
|
struct auxtrace_record *auxtrace_record__init(struct perf_evlist *evlist,
|
||
|
|
int *err)
|
||
|
|
{
|
||
|
|
struct auxtrace_record *aux;
|
||
|
|
struct perf_evsel *pos;
|
||
|
|
int diagnose = 0;
|
||
|
|
|
||
|
|
*err = 0;
|
||
|
|
if (evlist->nr_entries == 0)
|
||
|
|
return NULL;
|
||
|
|
|
||
|
|
evlist__for_each_entry(evlist, pos) {
|
||
|
|
if (pos->attr.config == PERF_EVENT_CPUM_SF_DIAG) {
|
||
|
|
diagnose = 1;
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
if (!diagnose)
|
||
|
|
return NULL;
|
||
|
|
|
||
|
|
/* sampling in diagnose mode. alloc aux buffer */
|
||
|
|
aux = zalloc(sizeof(*aux));
|
||
|
|
if (aux == NULL) {
|
||
|
|
*err = -ENOMEM;
|
||
|
|
return NULL;
|
||
|
|
}
|
||
|
|
|
||
|
|
aux->parse_snapshot_options = cpumsf_parse_snapshot_options;
|
||
|
|
aux->recording_options = cpumsf_recording_options;
|
||
|
|
aux->info_priv_size = cpumsf_info_priv_size;
|
||
|
|
aux->info_fill = cpumsf_info_fill;
|
||
|
|
aux->free = cpumsf_free;
|
||
|
|
aux->reference = cpumsf_reference;
|
||
|
|
|
||
|
|
return aux;
|
||
|
|
}
|