e0fcfb086f
As this isn't used at all in mmap.h but in evlist.h, so to cut down the header dependency tree, move it to where it is used. Also add mmap.h to the places using it but previously getting it indirectly via evlist.h. Add missing pthread.h to evlist.h, as it has a pthread_t struct member and was getting the header via mmap.h. Noticed while processing a Jiri's libperf batch touching mmap.h, where almost everything gets rebuilt because evlist.h is so popular, so cut down't this rebuild the world party. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Song Liu <songliubraving@fb.com> Link: https://lkml.kernel.org/n/tip-he0uljeftl0xfveh3d6vtode@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
124 lines
3.0 KiB
C
124 lines
3.0 KiB
C
#include <stdbool.h>
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#include <stdlib.h>
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#include <linux/kernel.h>
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#include <linux/types.h>
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#include <linux/bitops.h>
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#include <linux/log2.h>
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#include <linux/zalloc.h>
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#include "../../util/evlist.h"
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#include "../../util/auxtrace.h"
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#include "../../util/evsel.h"
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#include "../../util/record.h"
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#define PERF_EVENT_CPUM_SF 0xB0000 /* Event: Basic-sampling */
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#define PERF_EVENT_CPUM_SF_DIAG 0xBD000 /* Event: Combined-sampling */
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#define DEFAULT_AUX_PAGES 128
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#define DEFAULT_FREQ 4000
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static void cpumsf_free(struct auxtrace_record *itr)
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{
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free(itr);
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}
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static size_t cpumsf_info_priv_size(struct auxtrace_record *itr __maybe_unused,
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struct evlist *evlist __maybe_unused)
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{
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return 0;
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}
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static int
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cpumsf_info_fill(struct auxtrace_record *itr __maybe_unused,
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struct perf_session *session __maybe_unused,
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struct perf_record_auxtrace_info *auxtrace_info __maybe_unused,
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size_t priv_size __maybe_unused)
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{
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auxtrace_info->type = PERF_AUXTRACE_S390_CPUMSF;
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return 0;
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}
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static unsigned long
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cpumsf_reference(struct auxtrace_record *itr __maybe_unused)
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{
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return 0;
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}
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static int
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cpumsf_recording_options(struct auxtrace_record *ar __maybe_unused,
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struct evlist *evlist __maybe_unused,
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struct record_opts *opts)
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{
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unsigned int factor = 1;
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unsigned int pages;
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opts->full_auxtrace = true;
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/*
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* The AUX buffer size should be set properly to avoid
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* overflow of samples if it is not set explicitly.
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* DEFAULT_AUX_PAGES is an proper size when sampling frequency
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* is DEFAULT_FREQ. It is expected to hold about 1/2 second
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* of sampling data. The size used for AUX buffer will scale
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* according to the specified frequency and DEFAULT_FREQ.
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*/
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if (!opts->auxtrace_mmap_pages) {
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if (opts->user_freq != UINT_MAX)
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factor = (opts->user_freq + DEFAULT_FREQ
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- 1) / DEFAULT_FREQ;
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pages = DEFAULT_AUX_PAGES * factor;
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opts->auxtrace_mmap_pages = roundup_pow_of_two(pages);
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}
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return 0;
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}
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static int
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cpumsf_parse_snapshot_options(struct auxtrace_record *itr __maybe_unused,
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struct record_opts *opts __maybe_unused,
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const char *str __maybe_unused)
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{
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return 0;
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}
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/*
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* auxtrace_record__init is called when perf record
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* check if the event really need auxtrace
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*/
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struct auxtrace_record *auxtrace_record__init(struct evlist *evlist,
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int *err)
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{
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struct auxtrace_record *aux;
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struct evsel *pos;
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int diagnose = 0;
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*err = 0;
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if (evlist->core.nr_entries == 0)
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return NULL;
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evlist__for_each_entry(evlist, pos) {
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if (pos->core.attr.config == PERF_EVENT_CPUM_SF_DIAG) {
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diagnose = 1;
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break;
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}
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}
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if (!diagnose)
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return NULL;
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/* sampling in diagnose mode. alloc aux buffer */
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aux = zalloc(sizeof(*aux));
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if (aux == NULL) {
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*err = -ENOMEM;
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return NULL;
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}
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aux->parse_snapshot_options = cpumsf_parse_snapshot_options;
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aux->recording_options = cpumsf_recording_options;
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aux->info_priv_size = cpumsf_info_priv_size;
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aux->info_fill = cpumsf_info_fill;
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aux->free = cpumsf_free;
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aux->reference = cpumsf_reference;
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return aux;
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}
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