2 #include <linux/kernel.h>
3 #include <linux/types.h>
4 #include <linux/bitops.h>
5 #include <linux/log2.h>
7 #include "../../util/evlist.h"
8 #include "../../util/auxtrace.h"
9 #include "../../util/evsel.h"
11 #define PERF_EVENT_CPUM_SF 0xB0000 /* Event: Basic-sampling */
12 #define PERF_EVENT_CPUM_SF_DIAG 0xBD000 /* Event: Combined-sampling */
13 #define DEFAULT_AUX_PAGES 128
14 #define DEFAULT_FREQ 4000
16 static void cpumsf_free(struct auxtrace_record *itr)
21 static size_t cpumsf_info_priv_size(struct auxtrace_record *itr __maybe_unused,
22 struct perf_evlist *evlist __maybe_unused)
28 cpumsf_info_fill(struct auxtrace_record *itr __maybe_unused,
29 struct perf_session *session __maybe_unused,
30 struct auxtrace_info_event *auxtrace_info __maybe_unused,
31 size_t priv_size __maybe_unused)
37 cpumsf_reference(struct auxtrace_record *itr __maybe_unused)
43 cpumsf_recording_options(struct auxtrace_record *ar __maybe_unused,
44 struct perf_evlist *evlist __maybe_unused,
45 struct record_opts *opts)
47 unsigned int factor = 1;
50 opts->full_auxtrace = true;
53 * The AUX buffer size should be set properly to avoid
54 * overflow of samples if it is not set explicitly.
55 * DEFAULT_AUX_PAGES is an proper size when sampling frequency
56 * is DEFAULT_FREQ. It is expected to hold about 1/2 second
57 * of sampling data. The size used for AUX buffer will scale
58 * according to the specified frequency and DEFAULT_FREQ.
60 if (!opts->auxtrace_mmap_pages) {
61 if (opts->user_freq != UINT_MAX)
62 factor = (opts->user_freq + DEFAULT_FREQ
64 pages = DEFAULT_AUX_PAGES * factor;
65 opts->auxtrace_mmap_pages = roundup_pow_of_two(pages);
72 cpumsf_parse_snapshot_options(struct auxtrace_record *itr __maybe_unused,
73 struct record_opts *opts __maybe_unused,
74 const char *str __maybe_unused)
80 * auxtrace_record__init is called when perf record
81 * check if the event really need auxtrace
83 struct auxtrace_record *auxtrace_record__init(struct perf_evlist *evlist,
86 struct auxtrace_record *aux;
87 struct perf_evsel *pos;
90 if (evlist->nr_entries == 0)
93 evlist__for_each_entry(evlist, pos) {
94 if (pos->attr.config == PERF_EVENT_CPUM_SF_DIAG) {
103 /* sampling in diagnose mode. alloc aux buffer */
104 aux = zalloc(sizeof(*aux));
110 aux->parse_snapshot_options = cpumsf_parse_snapshot_options;
111 aux->recording_options = cpumsf_recording_options;
112 aux->info_priv_size = cpumsf_info_priv_size;
113 aux->info_fill = cpumsf_info_fill;
114 aux->free = cpumsf_free;
115 aux->reference = cpumsf_reference;