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609 lines
13 KiB
609 lines
13 KiB
// SPDX-License-Identifier: GPL-2.0 |
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#include <stddef.h> |
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#include <stdlib.h> |
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#include <string.h> |
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#include <errno.h> |
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#include <sys/types.h> |
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#include <sys/stat.h> |
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#include <unistd.h> |
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#include <api/fs/fs.h> |
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#include <linux/kernel.h> |
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#include "map_symbol.h" |
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#include "mem-events.h" |
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#include "debug.h" |
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#include "symbol.h" |
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#include "pmu.h" |
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#include "pmu-hybrid.h" |
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unsigned int perf_mem_events__loads_ldlat = 30; |
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#define E(t, n, s) { .tag = t, .name = n, .sysfs_name = s } |
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static struct perf_mem_event perf_mem_events[PERF_MEM_EVENTS__MAX] = { |
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E("ldlat-loads", "cpu/mem-loads,ldlat=%u/P", "cpu/events/mem-loads"), |
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E("ldlat-stores", "cpu/mem-stores/P", "cpu/events/mem-stores"), |
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E(NULL, NULL, NULL), |
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}; |
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#undef E |
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static char mem_loads_name[100]; |
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static bool mem_loads_name__init; |
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struct perf_mem_event * __weak perf_mem_events__ptr(int i) |
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{ |
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if (i >= PERF_MEM_EVENTS__MAX) |
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return NULL; |
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return &perf_mem_events[i]; |
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} |
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char * __weak perf_mem_events__name(int i, char *pmu_name __maybe_unused) |
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{ |
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struct perf_mem_event *e = perf_mem_events__ptr(i); |
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if (!e) |
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return NULL; |
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if (i == PERF_MEM_EVENTS__LOAD) { |
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if (!mem_loads_name__init) { |
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mem_loads_name__init = true; |
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scnprintf(mem_loads_name, sizeof(mem_loads_name), |
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e->name, perf_mem_events__loads_ldlat); |
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} |
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return mem_loads_name; |
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} |
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return (char *)e->name; |
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} |
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__weak bool is_mem_loads_aux_event(struct evsel *leader __maybe_unused) |
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{ |
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return false; |
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} |
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int perf_mem_events__parse(const char *str) |
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{ |
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char *tok, *saveptr = NULL; |
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bool found = false; |
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char *buf; |
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int j; |
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/* We need buffer that we know we can write to. */ |
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buf = malloc(strlen(str) + 1); |
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if (!buf) |
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return -ENOMEM; |
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strcpy(buf, str); |
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tok = strtok_r((char *)buf, ",", &saveptr); |
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while (tok) { |
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for (j = 0; j < PERF_MEM_EVENTS__MAX; j++) { |
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struct perf_mem_event *e = perf_mem_events__ptr(j); |
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if (!e->tag) |
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continue; |
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if (strstr(e->tag, tok)) |
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e->record = found = true; |
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} |
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tok = strtok_r(NULL, ",", &saveptr); |
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} |
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free(buf); |
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if (found) |
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return 0; |
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pr_err("failed: event '%s' not found, use '-e list' to get list of available events\n", str); |
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return -1; |
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} |
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static bool perf_mem_event__supported(const char *mnt, char *sysfs_name) |
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{ |
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char path[PATH_MAX]; |
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struct stat st; |
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scnprintf(path, PATH_MAX, "%s/devices/%s", mnt, sysfs_name); |
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return !stat(path, &st); |
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} |
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int perf_mem_events__init(void) |
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{ |
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const char *mnt = sysfs__mount(); |
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bool found = false; |
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int j; |
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if (!mnt) |
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return -ENOENT; |
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for (j = 0; j < PERF_MEM_EVENTS__MAX; j++) { |
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struct perf_mem_event *e = perf_mem_events__ptr(j); |
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struct perf_pmu *pmu; |
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char sysfs_name[100]; |
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/* |
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* If the event entry isn't valid, skip initialization |
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* and "e->supported" will keep false. |
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*/ |
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if (!e->tag) |
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continue; |
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if (!perf_pmu__has_hybrid()) { |
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scnprintf(sysfs_name, sizeof(sysfs_name), |
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e->sysfs_name, "cpu"); |
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e->supported = perf_mem_event__supported(mnt, sysfs_name); |
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} else { |
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perf_pmu__for_each_hybrid_pmu(pmu) { |
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scnprintf(sysfs_name, sizeof(sysfs_name), |
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e->sysfs_name, pmu->name); |
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e->supported |= perf_mem_event__supported(mnt, sysfs_name); |
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} |
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} |
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if (e->supported) |
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found = true; |
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} |
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return found ? 0 : -ENOENT; |
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} |
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void perf_mem_events__list(void) |
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{ |
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int j; |
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for (j = 0; j < PERF_MEM_EVENTS__MAX; j++) { |
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struct perf_mem_event *e = perf_mem_events__ptr(j); |
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fprintf(stderr, "%-13s%-*s%s\n", |
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e->tag ?: "", |
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verbose > 0 ? 25 : 0, |
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verbose > 0 ? perf_mem_events__name(j, NULL) : "", |
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e->supported ? ": available" : ""); |
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} |
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} |
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static void perf_mem_events__print_unsupport_hybrid(struct perf_mem_event *e, |
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int idx) |
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{ |
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const char *mnt = sysfs__mount(); |
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char sysfs_name[100]; |
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struct perf_pmu *pmu; |
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perf_pmu__for_each_hybrid_pmu(pmu) { |
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scnprintf(sysfs_name, sizeof(sysfs_name), e->sysfs_name, |
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pmu->name); |
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if (!perf_mem_event__supported(mnt, sysfs_name)) { |
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pr_err("failed: event '%s' not supported\n", |
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perf_mem_events__name(idx, pmu->name)); |
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} |
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} |
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} |
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int perf_mem_events__record_args(const char **rec_argv, int *argv_nr, |
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char **rec_tmp, int *tmp_nr) |
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{ |
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int i = *argv_nr, k = 0; |
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struct perf_mem_event *e; |
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struct perf_pmu *pmu; |
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char *s; |
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for (int j = 0; j < PERF_MEM_EVENTS__MAX; j++) { |
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e = perf_mem_events__ptr(j); |
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if (!e->record) |
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continue; |
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if (!perf_pmu__has_hybrid()) { |
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if (!e->supported) { |
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pr_err("failed: event '%s' not supported\n", |
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perf_mem_events__name(j, NULL)); |
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return -1; |
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} |
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rec_argv[i++] = "-e"; |
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rec_argv[i++] = perf_mem_events__name(j, NULL); |
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} else { |
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if (!e->supported) { |
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perf_mem_events__print_unsupport_hybrid(e, j); |
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return -1; |
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} |
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perf_pmu__for_each_hybrid_pmu(pmu) { |
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rec_argv[i++] = "-e"; |
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s = perf_mem_events__name(j, pmu->name); |
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if (s) { |
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s = strdup(s); |
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if (!s) |
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return -1; |
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rec_argv[i++] = s; |
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rec_tmp[k++] = s; |
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} |
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} |
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} |
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} |
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*argv_nr = i; |
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*tmp_nr = k; |
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return 0; |
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} |
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static const char * const tlb_access[] = { |
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"N/A", |
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"HIT", |
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"MISS", |
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"L1", |
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"L2", |
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"Walker", |
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"Fault", |
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}; |
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int perf_mem__tlb_scnprintf(char *out, size_t sz, struct mem_info *mem_info) |
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{ |
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size_t l = 0, i; |
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u64 m = PERF_MEM_TLB_NA; |
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u64 hit, miss; |
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sz -= 1; /* -1 for null termination */ |
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out[0] = '\0'; |
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if (mem_info) |
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m = mem_info->data_src.mem_dtlb; |
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hit = m & PERF_MEM_TLB_HIT; |
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miss = m & PERF_MEM_TLB_MISS; |
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/* already taken care of */ |
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m &= ~(PERF_MEM_TLB_HIT|PERF_MEM_TLB_MISS); |
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for (i = 0; m && i < ARRAY_SIZE(tlb_access); i++, m >>= 1) { |
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if (!(m & 0x1)) |
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continue; |
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if (l) { |
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strcat(out, " or "); |
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l += 4; |
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} |
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l += scnprintf(out + l, sz - l, tlb_access[i]); |
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} |
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if (*out == '\0') |
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l += scnprintf(out, sz - l, "N/A"); |
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if (hit) |
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l += scnprintf(out + l, sz - l, " hit"); |
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if (miss) |
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l += scnprintf(out + l, sz - l, " miss"); |
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return l; |
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} |
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static const char * const mem_lvl[] = { |
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"N/A", |
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"HIT", |
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"MISS", |
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"L1", |
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"LFB", |
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"L2", |
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"L3", |
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"Local RAM", |
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"Remote RAM (1 hop)", |
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"Remote RAM (2 hops)", |
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"Remote Cache (1 hop)", |
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"Remote Cache (2 hops)", |
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"I/O", |
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"Uncached", |
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}; |
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static const char * const mem_lvlnum[] = { |
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[PERF_MEM_LVLNUM_ANY_CACHE] = "Any cache", |
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[PERF_MEM_LVLNUM_LFB] = "LFB", |
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[PERF_MEM_LVLNUM_RAM] = "RAM", |
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[PERF_MEM_LVLNUM_PMEM] = "PMEM", |
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[PERF_MEM_LVLNUM_NA] = "N/A", |
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}; |
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int perf_mem__lvl_scnprintf(char *out, size_t sz, struct mem_info *mem_info) |
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{ |
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size_t i, l = 0; |
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u64 m = PERF_MEM_LVL_NA; |
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u64 hit, miss; |
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int printed; |
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if (mem_info) |
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m = mem_info->data_src.mem_lvl; |
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sz -= 1; /* -1 for null termination */ |
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out[0] = '\0'; |
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hit = m & PERF_MEM_LVL_HIT; |
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miss = m & PERF_MEM_LVL_MISS; |
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/* already taken care of */ |
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m &= ~(PERF_MEM_LVL_HIT|PERF_MEM_LVL_MISS); |
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if (mem_info && mem_info->data_src.mem_remote) { |
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strcat(out, "Remote "); |
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l += 7; |
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} |
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printed = 0; |
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for (i = 0; m && i < ARRAY_SIZE(mem_lvl); i++, m >>= 1) { |
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if (!(m & 0x1)) |
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continue; |
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if (printed++) { |
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strcat(out, " or "); |
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l += 4; |
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} |
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l += scnprintf(out + l, sz - l, mem_lvl[i]); |
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} |
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if (mem_info && mem_info->data_src.mem_lvl_num) { |
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int lvl = mem_info->data_src.mem_lvl_num; |
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if (printed++) { |
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strcat(out, " or "); |
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l += 4; |
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} |
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if (mem_lvlnum[lvl]) |
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l += scnprintf(out + l, sz - l, mem_lvlnum[lvl]); |
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else |
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l += scnprintf(out + l, sz - l, "L%d", lvl); |
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} |
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if (l == 0) |
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l += scnprintf(out + l, sz - l, "N/A"); |
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if (hit) |
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l += scnprintf(out + l, sz - l, " hit"); |
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if (miss) |
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l += scnprintf(out + l, sz - l, " miss"); |
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return l; |
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} |
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static const char * const snoop_access[] = { |
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"N/A", |
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"None", |
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"Hit", |
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"Miss", |
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"HitM", |
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}; |
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int perf_mem__snp_scnprintf(char *out, size_t sz, struct mem_info *mem_info) |
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{ |
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size_t i, l = 0; |
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u64 m = PERF_MEM_SNOOP_NA; |
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sz -= 1; /* -1 for null termination */ |
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out[0] = '\0'; |
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if (mem_info) |
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m = mem_info->data_src.mem_snoop; |
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for (i = 0; m && i < ARRAY_SIZE(snoop_access); i++, m >>= 1) { |
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if (!(m & 0x1)) |
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continue; |
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if (l) { |
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strcat(out, " or "); |
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l += 4; |
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} |
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l += scnprintf(out + l, sz - l, snoop_access[i]); |
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} |
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if (mem_info && |
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(mem_info->data_src.mem_snoopx & PERF_MEM_SNOOPX_FWD)) { |
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if (l) { |
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strcat(out, " or "); |
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l += 4; |
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} |
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l += scnprintf(out + l, sz - l, "Fwd"); |
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} |
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if (*out == '\0') |
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l += scnprintf(out, sz - l, "N/A"); |
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return l; |
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} |
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int perf_mem__lck_scnprintf(char *out, size_t sz, struct mem_info *mem_info) |
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{ |
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u64 mask = PERF_MEM_LOCK_NA; |
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int l; |
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if (mem_info) |
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mask = mem_info->data_src.mem_lock; |
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if (mask & PERF_MEM_LOCK_NA) |
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l = scnprintf(out, sz, "N/A"); |
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else if (mask & PERF_MEM_LOCK_LOCKED) |
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l = scnprintf(out, sz, "Yes"); |
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else |
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l = scnprintf(out, sz, "No"); |
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return l; |
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} |
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int perf_mem__blk_scnprintf(char *out, size_t sz, struct mem_info *mem_info) |
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{ |
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size_t l = 0; |
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u64 mask = PERF_MEM_BLK_NA; |
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sz -= 1; /* -1 for null termination */ |
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out[0] = '\0'; |
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if (mem_info) |
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mask = mem_info->data_src.mem_blk; |
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if (!mask || (mask & PERF_MEM_BLK_NA)) { |
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l += scnprintf(out + l, sz - l, " N/A"); |
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return l; |
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} |
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if (mask & PERF_MEM_BLK_DATA) |
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l += scnprintf(out + l, sz - l, " Data"); |
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if (mask & PERF_MEM_BLK_ADDR) |
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l += scnprintf(out + l, sz - l, " Addr"); |
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return l; |
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} |
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int perf_script__meminfo_scnprintf(char *out, size_t sz, struct mem_info *mem_info) |
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{ |
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int i = 0; |
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i += perf_mem__lvl_scnprintf(out, sz, mem_info); |
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i += scnprintf(out + i, sz - i, "|SNP "); |
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i += perf_mem__snp_scnprintf(out + i, sz - i, mem_info); |
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i += scnprintf(out + i, sz - i, "|TLB "); |
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i += perf_mem__tlb_scnprintf(out + i, sz - i, mem_info); |
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i += scnprintf(out + i, sz - i, "|LCK "); |
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i += perf_mem__lck_scnprintf(out + i, sz - i, mem_info); |
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i += scnprintf(out + i, sz - i, "|BLK "); |
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i += perf_mem__blk_scnprintf(out + i, sz - i, mem_info); |
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return i; |
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} |
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int c2c_decode_stats(struct c2c_stats *stats, struct mem_info *mi) |
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{ |
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union perf_mem_data_src *data_src = &mi->data_src; |
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u64 daddr = mi->daddr.addr; |
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u64 op = data_src->mem_op; |
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u64 lvl = data_src->mem_lvl; |
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u64 snoop = data_src->mem_snoop; |
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u64 lock = data_src->mem_lock; |
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u64 blk = data_src->mem_blk; |
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/* |
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* Skylake might report unknown remote level via this |
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* bit, consider it when evaluating remote HITMs. |
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*/ |
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bool mrem = data_src->mem_remote; |
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int err = 0; |
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#define HITM_INC(__f) \ |
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do { \ |
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stats->__f++; \ |
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stats->tot_hitm++; \ |
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} while (0) |
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#define P(a, b) PERF_MEM_##a##_##b |
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stats->nr_entries++; |
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if (lock & P(LOCK, LOCKED)) stats->locks++; |
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if (blk & P(BLK, DATA)) stats->blk_data++; |
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if (blk & P(BLK, ADDR)) stats->blk_addr++; |
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if (op & P(OP, LOAD)) { |
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/* load */ |
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stats->load++; |
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if (!daddr) { |
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stats->ld_noadrs++; |
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return -1; |
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} |
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if (lvl & P(LVL, HIT)) { |
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if (lvl & P(LVL, UNC)) stats->ld_uncache++; |
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if (lvl & P(LVL, IO)) stats->ld_io++; |
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if (lvl & P(LVL, LFB)) stats->ld_fbhit++; |
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if (lvl & P(LVL, L1 )) stats->ld_l1hit++; |
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if (lvl & P(LVL, L2 )) stats->ld_l2hit++; |
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if (lvl & P(LVL, L3 )) { |
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if (snoop & P(SNOOP, HITM)) |
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HITM_INC(lcl_hitm); |
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else |
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stats->ld_llchit++; |
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} |
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if (lvl & P(LVL, LOC_RAM)) { |
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stats->lcl_dram++; |
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if (snoop & P(SNOOP, HIT)) |
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stats->ld_shared++; |
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else |
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stats->ld_excl++; |
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} |
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if ((lvl & P(LVL, REM_RAM1)) || |
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(lvl & P(LVL, REM_RAM2)) || |
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mrem) { |
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stats->rmt_dram++; |
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if (snoop & P(SNOOP, HIT)) |
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stats->ld_shared++; |
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else |
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stats->ld_excl++; |
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} |
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} |
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if ((lvl & P(LVL, REM_CCE1)) || |
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(lvl & P(LVL, REM_CCE2)) || |
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mrem) { |
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if (snoop & P(SNOOP, HIT)) |
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stats->rmt_hit++; |
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else if (snoop & P(SNOOP, HITM)) |
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HITM_INC(rmt_hitm); |
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} |
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if ((lvl & P(LVL, MISS))) |
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stats->ld_miss++; |
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|
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} else if (op & P(OP, STORE)) { |
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/* store */ |
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stats->store++; |
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if (!daddr) { |
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stats->st_noadrs++; |
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return -1; |
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} |
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if (lvl & P(LVL, HIT)) { |
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if (lvl & P(LVL, UNC)) stats->st_uncache++; |
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if (lvl & P(LVL, L1 )) stats->st_l1hit++; |
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} |
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if (lvl & P(LVL, MISS)) |
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if (lvl & P(LVL, L1)) stats->st_l1miss++; |
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} else { |
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/* unparsable data_src? */ |
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stats->noparse++; |
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return -1; |
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} |
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if (!mi->daddr.ms.map || !mi->iaddr.ms.map) { |
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stats->nomap++; |
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return -1; |
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} |
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#undef P |
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#undef HITM_INC |
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return err; |
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} |
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void c2c_add_stats(struct c2c_stats *stats, struct c2c_stats *add) |
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{ |
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stats->nr_entries += add->nr_entries; |
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|
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stats->locks += add->locks; |
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stats->store += add->store; |
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stats->st_uncache += add->st_uncache; |
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stats->st_noadrs += add->st_noadrs; |
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stats->st_l1hit += add->st_l1hit; |
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stats->st_l1miss += add->st_l1miss; |
|
stats->load += add->load; |
|
stats->ld_excl += add->ld_excl; |
|
stats->ld_shared += add->ld_shared; |
|
stats->ld_uncache += add->ld_uncache; |
|
stats->ld_io += add->ld_io; |
|
stats->ld_miss += add->ld_miss; |
|
stats->ld_noadrs += add->ld_noadrs; |
|
stats->ld_fbhit += add->ld_fbhit; |
|
stats->ld_l1hit += add->ld_l1hit; |
|
stats->ld_l2hit += add->ld_l2hit; |
|
stats->ld_llchit += add->ld_llchit; |
|
stats->lcl_hitm += add->lcl_hitm; |
|
stats->rmt_hitm += add->rmt_hitm; |
|
stats->tot_hitm += add->tot_hitm; |
|
stats->rmt_hit += add->rmt_hit; |
|
stats->lcl_dram += add->lcl_dram; |
|
stats->rmt_dram += add->rmt_dram; |
|
stats->blk_data += add->blk_data; |
|
stats->blk_addr += add->blk_addr; |
|
stats->nomap += add->nomap; |
|
stats->noparse += add->noparse; |
|
}
|
|
|