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-rw-r--r--tools/perf/pmu-events/jevents.c1211
1 files changed, 1211 insertions, 0 deletions
diff --git a/tools/perf/pmu-events/jevents.c b/tools/perf/pmu-events/jevents.c
new file mode 100644
index 000000000..1f20f587e
--- /dev/null
+++ b/tools/perf/pmu-events/jevents.c
@@ -0,0 +1,1211 @@
+#define _XOPEN_SOURCE 500 /* needed for nftw() */
+#define _GNU_SOURCE /* needed for asprintf() */
+
+/* Parse event JSON files */
+
+/*
+ * Copyright (c) 2014, Intel Corporation
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
+ * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
+ * OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <errno.h>
+#include <string.h>
+#include <ctype.h>
+#include <unistd.h>
+#include <stdarg.h>
+#include <libgen.h>
+#include <limits.h>
+#include <dirent.h>
+#include <sys/time.h> /* getrlimit */
+#include <sys/resource.h> /* getrlimit */
+#include <ftw.h>
+#include <sys/stat.h>
+#include <linux/list.h>
+#include "jsmn.h"
+#include "json.h"
+#include "pmu-events.h"
+
+int verbose;
+char *prog;
+
+struct json_event {
+ char *name;
+ char *event;
+ char *desc;
+ char *long_desc;
+ char *pmu;
+ char *unit;
+ char *perpkg;
+ char *aggr_mode;
+ char *metric_expr;
+ char *metric_name;
+ char *metric_group;
+ char *deprecated;
+ char *metric_constraint;
+};
+
+enum aggr_mode_class convert(const char *aggr_mode)
+{
+ if (!strcmp(aggr_mode, "PerCore"))
+ return PerCore;
+ else if (!strcmp(aggr_mode, "PerChip"))
+ return PerChip;
+
+ pr_err("%s: Wrong AggregationMode value '%s'\n", prog, aggr_mode);
+ return -1;
+}
+
+typedef int (*func)(void *data, struct json_event *je);
+
+int eprintf(int level, int var, const char *fmt, ...)
+{
+
+ int ret;
+ va_list args;
+
+ if (var < level)
+ return 0;
+
+ va_start(args, fmt);
+
+ ret = vfprintf(stderr, fmt, args);
+
+ va_end(args);
+
+ return ret;
+}
+
+static void addfield(char *map, char **dst, const char *sep,
+ const char *a, jsmntok_t *bt)
+{
+ unsigned int len = strlen(a) + 1 + strlen(sep);
+ int olen = *dst ? strlen(*dst) : 0;
+ int blen = bt ? json_len(bt) : 0;
+ char *out;
+
+ out = realloc(*dst, len + olen + blen);
+ if (!out) {
+ /* Don't add field in this case */
+ return;
+ }
+ *dst = out;
+
+ if (!olen)
+ *(*dst) = 0;
+ else
+ strcat(*dst, sep);
+ strcat(*dst, a);
+ if (bt)
+ strncat(*dst, map + bt->start, blen);
+}
+
+static void fixname(char *s)
+{
+ for (; *s; s++)
+ *s = tolower(*s);
+}
+
+static void fixdesc(char *s)
+{
+ char *e = s + strlen(s);
+
+ /* Remove trailing dots that look ugly in perf list */
+ --e;
+ while (e >= s && isspace(*e))
+ --e;
+ if (*e == '.')
+ *e = 0;
+}
+
+/* Add escapes for '\' so they are proper C strings. */
+static char *fixregex(char *s)
+{
+ int len = 0;
+ int esc_count = 0;
+ char *fixed = NULL;
+ char *p, *q;
+
+ /* Count the number of '\' in string */
+ for (p = s; *p; p++) {
+ ++len;
+ if (*p == '\\')
+ ++esc_count;
+ }
+
+ if (esc_count == 0)
+ return s;
+
+ /* allocate space for a new string */
+ fixed = (char *) malloc(len + esc_count + 1);
+ if (!fixed)
+ return NULL;
+
+ /* copy over the characters */
+ q = fixed;
+ for (p = s; *p; p++) {
+ if (*p == '\\') {
+ *q = '\\';
+ ++q;
+ }
+ *q = *p;
+ ++q;
+ }
+ *q = '\0';
+ return fixed;
+}
+
+static struct msrmap {
+ const char *num;
+ const char *pname;
+} msrmap[] = {
+ { "0x3F6", "ldlat=" },
+ { "0x1A6", "offcore_rsp=" },
+ { "0x1A7", "offcore_rsp=" },
+ { "0x3F7", "frontend=" },
+ { NULL, NULL }
+};
+
+static struct field {
+ const char *field;
+ const char *kernel;
+} fields[] = {
+ { "UMask", "umask=" },
+ { "CounterMask", "cmask=" },
+ { "Invert", "inv=" },
+ { "AnyThread", "any=" },
+ { "EdgeDetect", "edge=" },
+ { "SampleAfterValue", "period=" },
+ { "FCMask", "fc_mask=" },
+ { "PortMask", "ch_mask=" },
+ { NULL, NULL }
+};
+
+static void cut_comma(char *map, jsmntok_t *newval)
+{
+ int i;
+
+ /* Cut off everything after comma */
+ for (i = newval->start; i < newval->end; i++) {
+ if (map[i] == ',')
+ newval->end = i;
+ }
+}
+
+static int match_field(char *map, jsmntok_t *field, int nz,
+ char **event, jsmntok_t *val)
+{
+ struct field *f;
+ jsmntok_t newval = *val;
+
+ for (f = fields; f->field; f++)
+ if (json_streq(map, field, f->field) && nz) {
+ cut_comma(map, &newval);
+ addfield(map, event, ",", f->kernel, &newval);
+ return 1;
+ }
+ return 0;
+}
+
+static struct msrmap *lookup_msr(char *map, jsmntok_t *val)
+{
+ jsmntok_t newval = *val;
+ static bool warned;
+ int i;
+
+ cut_comma(map, &newval);
+ for (i = 0; msrmap[i].num; i++)
+ if (json_streq(map, &newval, msrmap[i].num))
+ return &msrmap[i];
+ if (!warned) {
+ warned = true;
+ pr_err("%s: Unknown MSR in event file %.*s\n", prog,
+ json_len(val), map + val->start);
+ }
+ return NULL;
+}
+
+static struct map {
+ const char *json;
+ const char *perf;
+} unit_to_pmu[] = {
+ { "CBO", "uncore_cbox" },
+ { "QPI LL", "uncore_qpi" },
+ { "SBO", "uncore_sbox" },
+ { "iMPH-U", "uncore_arb" },
+ { "CPU-M-CF", "cpum_cf" },
+ { "CPU-M-SF", "cpum_sf" },
+ { "UPI LL", "uncore_upi" },
+ { "hisi_sccl,ddrc", "hisi_sccl,ddrc" },
+ { "hisi_sccl,hha", "hisi_sccl,hha" },
+ { "hisi_sccl,l3c", "hisi_sccl,l3c" },
+ { "L3PMC", "amd_l3" },
+ { "DFPMC", "amd_df" },
+ {}
+};
+
+static const char *field_to_perf(struct map *table, char *map, jsmntok_t *val)
+{
+ int i;
+
+ for (i = 0; table[i].json; i++) {
+ if (json_streq(map, val, table[i].json))
+ return table[i].perf;
+ }
+ return NULL;
+}
+
+#define EXPECT(e, t, m) do { if (!(e)) { \
+ jsmntok_t *loc = (t); \
+ if (!(t)->start && (t) > tokens) \
+ loc = (t) - 1; \
+ pr_err("%s:%d: " m ", got %s\n", fn, \
+ json_line(map, loc), \
+ json_name(t)); \
+ err = -EIO; \
+ goto out_free; \
+} } while (0)
+
+static char *topic;
+
+static char *get_topic(void)
+{
+ char *tp;
+ int i;
+
+ /* tp is free'd in process_one_file() */
+ i = asprintf(&tp, "%s", topic);
+ if (i < 0) {
+ pr_info("%s: asprintf() error %s\n", prog);
+ return NULL;
+ }
+
+ for (i = 0; i < (int) strlen(tp); i++) {
+ char c = tp[i];
+
+ if (c == '-')
+ tp[i] = ' ';
+ else if (c == '.') {
+ tp[i] = '\0';
+ break;
+ }
+ }
+
+ return tp;
+}
+
+static int add_topic(char *bname)
+{
+ free(topic);
+ topic = strdup(bname);
+ if (!topic) {
+ pr_info("%s: strdup() error %s for file %s\n", prog,
+ strerror(errno), bname);
+ return -ENOMEM;
+ }
+ return 0;
+}
+
+struct perf_entry_data {
+ FILE *outfp;
+ char *topic;
+};
+
+static int close_table;
+
+static void print_events_table_prefix(FILE *fp, const char *tblname)
+{
+ fprintf(fp, "struct pmu_event %s[] = {\n", tblname);
+ close_table = 1;
+}
+
+static int print_events_table_entry(void *data, struct json_event *je)
+{
+ struct perf_entry_data *pd = data;
+ FILE *outfp = pd->outfp;
+ char *topic = pd->topic;
+
+ /*
+ * TODO: Remove formatting chars after debugging to reduce
+ * string lengths.
+ */
+ fprintf(outfp, "{\n");
+
+ if (je->name)
+ fprintf(outfp, "\t.name = \"%s\",\n", je->name);
+ if (je->event)
+ fprintf(outfp, "\t.event = \"%s\",\n", je->event);
+ fprintf(outfp, "\t.desc = \"%s\",\n", je->desc);
+ fprintf(outfp, "\t.topic = \"%s\",\n", topic);
+ if (je->long_desc && je->long_desc[0])
+ fprintf(outfp, "\t.long_desc = \"%s\",\n", je->long_desc);
+ if (je->pmu)
+ fprintf(outfp, "\t.pmu = \"%s\",\n", je->pmu);
+ if (je->unit)
+ fprintf(outfp, "\t.unit = \"%s\",\n", je->unit);
+ if (je->perpkg)
+ fprintf(outfp, "\t.perpkg = \"%s\",\n", je->perpkg);
+ if (je->aggr_mode)
+ fprintf(outfp, "\t.aggr_mode = \"%d\",\n", convert(je->aggr_mode));
+ if (je->metric_expr)
+ fprintf(outfp, "\t.metric_expr = \"%s\",\n", je->metric_expr);
+ if (je->metric_name)
+ fprintf(outfp, "\t.metric_name = \"%s\",\n", je->metric_name);
+ if (je->metric_group)
+ fprintf(outfp, "\t.metric_group = \"%s\",\n", je->metric_group);
+ if (je->deprecated)
+ fprintf(outfp, "\t.deprecated = \"%s\",\n", je->deprecated);
+ if (je->metric_constraint)
+ fprintf(outfp, "\t.metric_constraint = \"%s\",\n", je->metric_constraint);
+ fprintf(outfp, "},\n");
+
+ return 0;
+}
+
+struct event_struct {
+ struct list_head list;
+ char *name;
+ char *event;
+ char *desc;
+ char *long_desc;
+ char *pmu;
+ char *unit;
+ char *perpkg;
+ char *aggr_mode;
+ char *metric_expr;
+ char *metric_name;
+ char *metric_group;
+ char *deprecated;
+ char *metric_constraint;
+};
+
+#define ADD_EVENT_FIELD(field) do { if (je->field) { \
+ es->field = strdup(je->field); \
+ if (!es->field) \
+ goto out_free; \
+} } while (0)
+
+#define FREE_EVENT_FIELD(field) free(es->field)
+
+#define TRY_FIXUP_FIELD(field) do { if (es->field && !je->field) {\
+ je->field = strdup(es->field); \
+ if (!je->field) \
+ return -ENOMEM; \
+} } while (0)
+
+#define FOR_ALL_EVENT_STRUCT_FIELDS(op) do { \
+ op(name); \
+ op(event); \
+ op(desc); \
+ op(long_desc); \
+ op(pmu); \
+ op(unit); \
+ op(perpkg); \
+ op(aggr_mode); \
+ op(metric_expr); \
+ op(metric_name); \
+ op(metric_group); \
+ op(deprecated); \
+} while (0)
+
+static LIST_HEAD(arch_std_events);
+
+static void free_arch_std_events(void)
+{
+ struct event_struct *es, *next;
+
+ list_for_each_entry_safe(es, next, &arch_std_events, list) {
+ FOR_ALL_EVENT_STRUCT_FIELDS(FREE_EVENT_FIELD);
+ list_del_init(&es->list);
+ free(es);
+ }
+}
+
+static int save_arch_std_events(void *data, struct json_event *je)
+{
+ struct event_struct *es;
+
+ es = malloc(sizeof(*es));
+ if (!es)
+ return -ENOMEM;
+ memset(es, 0, sizeof(*es));
+ FOR_ALL_EVENT_STRUCT_FIELDS(ADD_EVENT_FIELD);
+ list_add_tail(&es->list, &arch_std_events);
+ return 0;
+out_free:
+ FOR_ALL_EVENT_STRUCT_FIELDS(FREE_EVENT_FIELD);
+ free(es);
+ return -ENOMEM;
+}
+
+static void print_events_table_suffix(FILE *outfp)
+{
+ fprintf(outfp, "{\n");
+
+ fprintf(outfp, "\t.name = 0,\n");
+ fprintf(outfp, "\t.event = 0,\n");
+ fprintf(outfp, "\t.desc = 0,\n");
+
+ fprintf(outfp, "},\n");
+ fprintf(outfp, "};\n");
+ close_table = 0;
+}
+
+static struct fixed {
+ const char *name;
+ const char *event;
+} fixed[] = {
+ { "inst_retired.any", "event=0xc0,period=2000003" },
+ { "inst_retired.any_p", "event=0xc0,period=2000003" },
+ { "cpu_clk_unhalted.ref", "event=0x0,umask=0x03,period=2000003" },
+ { "cpu_clk_unhalted.thread", "event=0x3c,period=2000003" },
+ { "cpu_clk_unhalted.core", "event=0x3c,period=2000003" },
+ { "cpu_clk_unhalted.thread_any", "event=0x3c,any=1,period=2000003" },
+ { NULL, NULL},
+};
+
+/*
+ * Handle different fixed counter encodings between JSON and perf.
+ */
+static char *real_event(const char *name, char *event)
+{
+ int i;
+
+ if (!name)
+ return NULL;
+
+ for (i = 0; fixed[i].name; i++)
+ if (!strcasecmp(name, fixed[i].name))
+ return (char *)fixed[i].event;
+ return event;
+}
+
+static int
+try_fixup(const char *fn, char *arch_std, struct json_event *je, char **event)
+{
+ /* try to find matching event from arch standard values */
+ struct event_struct *es;
+
+ list_for_each_entry(es, &arch_std_events, list) {
+ if (!strcmp(arch_std, es->name)) {
+ FOR_ALL_EVENT_STRUCT_FIELDS(TRY_FIXUP_FIELD);
+ *event = je->event;
+ return 0;
+ }
+ }
+
+ pr_err("%s: could not find matching %s for %s\n",
+ prog, arch_std, fn);
+ return -1;
+}
+
+/* Call func with each event in the json file */
+static int json_events(const char *fn,
+ int (*func)(void *data, struct json_event *je),
+ void *data)
+{
+ int err;
+ size_t size;
+ jsmntok_t *tokens, *tok;
+ int i, j, len;
+ char *map;
+ char buf[128];
+
+ if (!fn)
+ return -ENOENT;
+
+ tokens = parse_json(fn, &map, &size, &len);
+ if (!tokens)
+ return -EIO;
+ EXPECT(tokens->type == JSMN_ARRAY, tokens, "expected top level array");
+ tok = tokens + 1;
+ for (i = 0; i < tokens->size; i++) {
+ char *event = NULL;
+ char *extra_desc = NULL;
+ char *filter = NULL;
+ struct json_event je = {};
+ char *arch_std = NULL;
+ unsigned long long eventcode = 0;
+ struct msrmap *msr = NULL;
+ jsmntok_t *msrval = NULL;
+ jsmntok_t *precise = NULL;
+ jsmntok_t *obj = tok++;
+
+ EXPECT(obj->type == JSMN_OBJECT, obj, "expected object");
+ for (j = 0; j < obj->size; j += 2) {
+ jsmntok_t *field, *val;
+ int nz;
+ char *s;
+
+ field = tok + j;
+ EXPECT(field->type == JSMN_STRING, tok + j,
+ "Expected field name");
+ val = tok + j + 1;
+ EXPECT(val->type == JSMN_STRING, tok + j + 1,
+ "Expected string value");
+
+ nz = !json_streq(map, val, "0");
+ if (match_field(map, field, nz, &event, val)) {
+ /* ok */
+ } else if (json_streq(map, field, "EventCode")) {
+ char *code = NULL;
+ addfield(map, &code, "", "", val);
+ eventcode |= strtoul(code, NULL, 0);
+ free(code);
+ } else if (json_streq(map, field, "ExtSel")) {
+ char *code = NULL;
+ addfield(map, &code, "", "", val);
+ eventcode |= strtoul(code, NULL, 0) << 8;
+ free(code);
+ } else if (json_streq(map, field, "EventName")) {
+ addfield(map, &je.name, "", "", val);
+ } else if (json_streq(map, field, "BriefDescription")) {
+ addfield(map, &je.desc, "", "", val);
+ fixdesc(je.desc);
+ } else if (json_streq(map, field,
+ "PublicDescription")) {
+ addfield(map, &je.long_desc, "", "", val);
+ fixdesc(je.long_desc);
+ } else if (json_streq(map, field, "PEBS") && nz) {
+ precise = val;
+ } else if (json_streq(map, field, "MSRIndex") && nz) {
+ msr = lookup_msr(map, val);
+ } else if (json_streq(map, field, "MSRValue")) {
+ msrval = val;
+ } else if (json_streq(map, field, "Errata") &&
+ !json_streq(map, val, "null")) {
+ addfield(map, &extra_desc, ". ",
+ " Spec update: ", val);
+ } else if (json_streq(map, field, "Data_LA") && nz) {
+ addfield(map, &extra_desc, ". ",
+ " Supports address when precise",
+ NULL);
+ } else if (json_streq(map, field, "Unit")) {
+ const char *ppmu;
+
+ ppmu = field_to_perf(unit_to_pmu, map, val);
+ if (ppmu) {
+ je.pmu = strdup(ppmu);
+ } else {
+ if (!je.pmu)
+ je.pmu = strdup("uncore_");
+ addfield(map, &je.pmu, "", "", val);
+ for (s = je.pmu; *s; s++)
+ *s = tolower(*s);
+ }
+ addfield(map, &je.desc, ". ", "Unit: ", NULL);
+ addfield(map, &je.desc, "", je.pmu, NULL);
+ addfield(map, &je.desc, "", " ", NULL);
+ } else if (json_streq(map, field, "Filter")) {
+ addfield(map, &filter, "", "", val);
+ } else if (json_streq(map, field, "ScaleUnit")) {
+ addfield(map, &je.unit, "", "", val);
+ } else if (json_streq(map, field, "PerPkg")) {
+ addfield(map, &je.perpkg, "", "", val);
+ } else if (json_streq(map, field, "AggregationMode")) {
+ addfield(map, &je.aggr_mode, "", "", val);
+ } else if (json_streq(map, field, "Deprecated")) {
+ addfield(map, &je.deprecated, "", "", val);
+ } else if (json_streq(map, field, "MetricName")) {
+ addfield(map, &je.metric_name, "", "", val);
+ } else if (json_streq(map, field, "MetricGroup")) {
+ addfield(map, &je.metric_group, "", "", val);
+ } else if (json_streq(map, field, "MetricConstraint")) {
+ addfield(map, &je.metric_constraint, "", "", val);
+ } else if (json_streq(map, field, "MetricExpr")) {
+ addfield(map, &je.metric_expr, "", "", val);
+ for (s = je.metric_expr; *s; s++)
+ *s = tolower(*s);
+ } else if (json_streq(map, field, "ArchStdEvent")) {
+ addfield(map, &arch_std, "", "", val);
+ for (s = arch_std; *s; s++)
+ *s = tolower(*s);
+ }
+ /* ignore unknown fields */
+ }
+ if (precise && je.desc && !strstr(je.desc, "(Precise Event)")) {
+ if (json_streq(map, precise, "2"))
+ addfield(map, &extra_desc, " ",
+ "(Must be precise)", NULL);
+ else
+ addfield(map, &extra_desc, " ",
+ "(Precise event)", NULL);
+ }
+ snprintf(buf, sizeof buf, "event=%#llx", eventcode);
+ addfield(map, &event, ",", buf, NULL);
+ if (je.desc && extra_desc)
+ addfield(map, &je.desc, " ", extra_desc, NULL);
+ if (je.long_desc && extra_desc)
+ addfield(map, &je.long_desc, " ", extra_desc, NULL);
+ if (filter)
+ addfield(map, &event, ",", filter, NULL);
+ if (msr != NULL)
+ addfield(map, &event, ",", msr->pname, msrval);
+ if (je.name)
+ fixname(je.name);
+
+ if (arch_std) {
+ /*
+ * An arch standard event is referenced, so try to
+ * fixup any unassigned values.
+ */
+ err = try_fixup(fn, arch_std, &je, &event);
+ if (err)
+ goto free_strings;
+ }
+ je.event = real_event(je.name, event);
+ err = func(data, &je);
+free_strings:
+ free(event);
+ free(je.desc);
+ free(je.name);
+ free(je.long_desc);
+ free(extra_desc);
+ free(je.pmu);
+ free(filter);
+ free(je.perpkg);
+ free(je.aggr_mode);
+ free(je.deprecated);
+ free(je.unit);
+ free(je.metric_expr);
+ free(je.metric_name);
+ free(je.metric_group);
+ free(je.metric_constraint);
+ free(arch_std);
+
+ if (err)
+ break;
+ tok += j;
+ }
+ EXPECT(tok - tokens == len, tok, "unexpected objects at end");
+ err = 0;
+out_free:
+ free_json(map, size, tokens);
+ return err;
+}
+
+static char *file_name_to_table_name(char *fname)
+{
+ unsigned int i;
+ int n;
+ int c;
+ char *tblname;
+
+ /*
+ * Ensure tablename starts with alphabetic character.
+ * Derive rest of table name from basename of the JSON file,
+ * replacing hyphens and stripping out .json suffix.
+ */
+ n = asprintf(&tblname, "pme_%s", fname);
+ if (n < 0) {
+ pr_info("%s: asprintf() error %s for file %s\n", prog,
+ strerror(errno), fname);
+ return NULL;
+ }
+
+ for (i = 0; i < strlen(tblname); i++) {
+ c = tblname[i];
+
+ if (c == '-' || c == '/')
+ tblname[i] = '_';
+ else if (c == '.') {
+ tblname[i] = '\0';
+ break;
+ } else if (!isalnum(c) && c != '_') {
+ pr_err("%s: Invalid character '%c' in file name %s\n",
+ prog, c, basename(fname));
+ free(tblname);
+ tblname = NULL;
+ break;
+ }
+ }
+
+ return tblname;
+}
+
+static void print_mapping_table_prefix(FILE *outfp)
+{
+ fprintf(outfp, "struct pmu_events_map pmu_events_map[] = {\n");
+}
+
+static void print_mapping_table_suffix(FILE *outfp)
+{
+ /*
+ * Print the terminating, NULL entry.
+ */
+ fprintf(outfp, "{\n");
+ fprintf(outfp, "\t.cpuid = 0,\n");
+ fprintf(outfp, "\t.version = 0,\n");
+ fprintf(outfp, "\t.type = 0,\n");
+ fprintf(outfp, "\t.table = 0,\n");
+ fprintf(outfp, "},\n");
+
+ /* and finally, the closing curly bracket for the struct */
+ fprintf(outfp, "};\n");
+}
+
+static void print_mapping_test_table(FILE *outfp)
+{
+ /*
+ * Print the terminating, NULL entry.
+ */
+ fprintf(outfp, "{\n");
+ fprintf(outfp, "\t.cpuid = \"testcpu\",\n");
+ fprintf(outfp, "\t.version = \"v1\",\n");
+ fprintf(outfp, "\t.type = \"core\",\n");
+ fprintf(outfp, "\t.table = pme_test_cpu,\n");
+ fprintf(outfp, "},\n");
+}
+
+static int process_mapfile(FILE *outfp, char *fpath)
+{
+ int n = 16384;
+ FILE *mapfp;
+ char *save = NULL;
+ char *line, *p;
+ int line_num;
+ char *tblname;
+ int ret = 0;
+
+ pr_info("%s: Processing mapfile %s\n", prog, fpath);
+
+ line = malloc(n);
+ if (!line)
+ return -1;
+
+ mapfp = fopen(fpath, "r");
+ if (!mapfp) {
+ pr_info("%s: Error %s opening %s\n", prog, strerror(errno),
+ fpath);
+ free(line);
+ return -1;
+ }
+
+ print_mapping_table_prefix(outfp);
+
+ /* Skip first line (header) */
+ p = fgets(line, n, mapfp);
+ if (!p)
+ goto out;
+
+ line_num = 1;
+ while (1) {
+ char *cpuid, *version, *type, *fname;
+
+ line_num++;
+ p = fgets(line, n, mapfp);
+ if (!p)
+ break;
+
+ if (line[0] == '#' || line[0] == '\n')
+ continue;
+
+ if (line[strlen(line)-1] != '\n') {
+ /* TODO Deal with lines longer than 16K */
+ pr_info("%s: Mapfile %s: line %d too long, aborting\n",
+ prog, fpath, line_num);
+ ret = -1;
+ goto out;
+ }
+ line[strlen(line)-1] = '\0';
+
+ cpuid = fixregex(strtok_r(p, ",", &save));
+ version = strtok_r(NULL, ",", &save);
+ fname = strtok_r(NULL, ",", &save);
+ type = strtok_r(NULL, ",", &save);
+
+ tblname = file_name_to_table_name(fname);
+ fprintf(outfp, "{\n");
+ fprintf(outfp, "\t.cpuid = \"%s\",\n", cpuid);
+ fprintf(outfp, "\t.version = \"%s\",\n", version);
+ fprintf(outfp, "\t.type = \"%s\",\n", type);
+
+ /*
+ * CHECK: We can't use the type (eg "core") field in the
+ * table name. For us to do that, we need to somehow tweak
+ * the other caller of file_name_to_table(), process_json()
+ * to determine the type. process_json() file has no way
+ * of knowing these are "core" events unless file name has
+ * core in it. If filename has core in it, we can safely
+ * ignore the type field here also.
+ */
+ fprintf(outfp, "\t.table = %s\n", tblname);
+ fprintf(outfp, "},\n");
+ }
+
+out:
+ print_mapping_test_table(outfp);
+ print_mapping_table_suffix(outfp);
+ fclose(mapfp);
+ free(line);
+ return ret;
+}
+
+/*
+ * If we fail to locate/process JSON and map files, create a NULL mapping
+ * table. This would at least allow perf to build even if we can't find/use
+ * the aliases.
+ */
+static void create_empty_mapping(const char *output_file)
+{
+ FILE *outfp;
+
+ pr_info("%s: Creating empty pmu_events_map[] table\n", prog);
+
+ /* Truncate file to clear any partial writes to it */
+ outfp = fopen(output_file, "w");
+ if (!outfp) {
+ perror("fopen()");
+ _Exit(1);
+ }
+
+ fprintf(outfp, "#include \"pmu-events/pmu-events.h\"\n");
+ print_mapping_table_prefix(outfp);
+ print_mapping_table_suffix(outfp);
+ fclose(outfp);
+}
+
+static int get_maxfds(void)
+{
+ struct rlimit rlim;
+
+ if (getrlimit(RLIMIT_NOFILE, &rlim) == 0)
+ return min(rlim.rlim_max / 2, (rlim_t)512);
+
+ return 512;
+}
+
+/*
+ * nftw() doesn't let us pass an argument to the processing function,
+ * so use a global variables.
+ */
+static FILE *eventsfp;
+static char *mapfile;
+
+static int is_leaf_dir(const char *fpath)
+{
+ DIR *d;
+ struct dirent *dir;
+ int res = 1;
+
+ d = opendir(fpath);
+ if (!d)
+ return 0;
+
+ while ((dir = readdir(d)) != NULL) {
+ if (!strcmp(dir->d_name, ".") || !strcmp(dir->d_name, ".."))
+ continue;
+
+ if (dir->d_type == DT_DIR) {
+ res = 0;
+ break;
+ } else if (dir->d_type == DT_UNKNOWN) {
+ char path[PATH_MAX];
+ struct stat st;
+
+ sprintf(path, "%s/%s", fpath, dir->d_name);
+ if (stat(path, &st))
+ break;
+
+ if (S_ISDIR(st.st_mode)) {
+ res = 0;
+ break;
+ }
+ }
+ }
+
+ closedir(d);
+
+ return res;
+}
+
+static int is_json_file(const char *name)
+{
+ const char *suffix;
+
+ if (strlen(name) < 5)
+ return 0;
+
+ suffix = name + strlen(name) - 5;
+
+ if (strncmp(suffix, ".json", 5) == 0)
+ return 1;
+ return 0;
+}
+
+static int preprocess_arch_std_files(const char *fpath, const struct stat *sb,
+ int typeflag, struct FTW *ftwbuf)
+{
+ int level = ftwbuf->level;
+ int is_file = typeflag == FTW_F;
+
+ if (level == 1 && is_file && is_json_file(fpath))
+ return json_events(fpath, save_arch_std_events, (void *)sb);
+
+ return 0;
+}
+
+static int process_one_file(const char *fpath, const struct stat *sb,
+ int typeflag, struct FTW *ftwbuf)
+{
+ char *tblname, *bname;
+ int is_dir = typeflag == FTW_D;
+ int is_file = typeflag == FTW_F;
+ int level = ftwbuf->level;
+ int err = 0;
+
+ if (level == 2 && is_dir) {
+ /*
+ * For level 2 directory, bname will include parent name,
+ * like vendor/platform. So search back from platform dir
+ * to find this.
+ */
+ bname = (char *) fpath + ftwbuf->base - 2;
+ for (;;) {
+ if (*bname == '/')
+ break;
+ bname--;
+ }
+ bname++;
+ } else
+ bname = (char *) fpath + ftwbuf->base;
+
+ pr_debug("%s %d %7jd %-20s %s\n",
+ is_file ? "f" : is_dir ? "d" : "x",
+ level, sb->st_size, bname, fpath);
+
+ /* base dir or too deep */
+ if (level == 0 || level > 3)
+ return 0;
+
+
+ /* model directory, reset topic */
+ if ((level == 1 && is_dir && is_leaf_dir(fpath)) ||
+ (level == 2 && is_dir)) {
+ if (close_table)
+ print_events_table_suffix(eventsfp);
+
+ /*
+ * Drop file name suffix. Replace hyphens with underscores.
+ * Fail if file name contains any alphanum characters besides
+ * underscores.
+ */
+ tblname = file_name_to_table_name(bname);
+ if (!tblname) {
+ pr_info("%s: Error determining table name for %s\n", prog,
+ bname);
+ return -1;
+ }
+
+ print_events_table_prefix(eventsfp, tblname);
+ return 0;
+ }
+
+ /*
+ * Save the mapfile name for now. We will process mapfile
+ * after processing all JSON files (so we can write out the
+ * mapping table after all PMU events tables).
+ *
+ */
+ if (level == 1 && is_file) {
+ if (!strcmp(bname, "mapfile.csv")) {
+ mapfile = strdup(fpath);
+ return 0;
+ }
+
+ pr_info("%s: Ignoring file %s\n", prog, fpath);
+ return 0;
+ }
+
+ /*
+ * If the file name does not have a .json extension,
+ * ignore it. It could be a readme.txt for instance.
+ */
+ if (is_file) {
+ if (!is_json_file(bname)) {
+ pr_info("%s: Ignoring file without .json suffix %s\n", prog,
+ fpath);
+ return 0;
+ }
+ }
+
+ if (level > 1 && add_topic(bname))
+ return -ENOMEM;
+
+ /*
+ * Assume all other files are JSON files.
+ *
+ * If mapfile refers to 'power7_core.json', we create a table
+ * named 'power7_core'. Any inconsistencies between the mapfile
+ * and directory tree could result in build failure due to table
+ * names not being found.
+ *
+ * Atleast for now, be strict with processing JSON file names.
+ * i.e. if JSON file name cannot be mapped to C-style table name,
+ * fail.
+ */
+ if (is_file) {
+ struct perf_entry_data data = {
+ .topic = get_topic(),
+ .outfp = eventsfp,
+ };
+
+ err = json_events(fpath, print_events_table_entry, &data);
+
+ free(data.topic);
+ }
+
+ return err;
+}
+
+#ifndef PATH_MAX
+#define PATH_MAX 4096
+#endif
+
+/*
+ * Starting in directory 'start_dirname', find the "mapfile.csv" and
+ * the set of JSON files for the architecture 'arch'.
+ *
+ * From each JSON file, create a C-style "PMU events table" from the
+ * JSON file (see struct pmu_event).
+ *
+ * From the mapfile, create a mapping between the CPU revisions and
+ * PMU event tables (see struct pmu_events_map).
+ *
+ * Write out the PMU events tables and the mapping table to pmu-event.c.
+ */
+int main(int argc, char *argv[])
+{
+ int rc, ret = 0, empty_map = 0;
+ int maxfds;
+ char ldirname[PATH_MAX];
+ const char *arch;
+ const char *output_file;
+ const char *start_dirname;
+ char *err_string_ext = "";
+ struct stat stbuf;
+
+ prog = basename(argv[0]);
+ if (argc < 4) {
+ pr_err("Usage: %s <arch> <starting_dir> <output_file>\n", prog);
+ return 1;
+ }
+
+ arch = argv[1];
+ start_dirname = argv[2];
+ output_file = argv[3];
+
+ if (argc > 4)
+ verbose = atoi(argv[4]);
+
+ eventsfp = fopen(output_file, "w");
+ if (!eventsfp) {
+ pr_err("%s Unable to create required file %s (%s)\n",
+ prog, output_file, strerror(errno));
+ return 2;
+ }
+
+ sprintf(ldirname, "%s/%s", start_dirname, arch);
+
+ /* If architecture does not have any event lists, bail out */
+ if (stat(ldirname, &stbuf) < 0) {
+ pr_info("%s: Arch %s has no PMU event lists\n", prog, arch);
+ empty_map = 1;
+ goto err_close_eventsfp;
+ }
+
+ /* Include pmu-events.h first */
+ fprintf(eventsfp, "#include \"pmu-events/pmu-events.h\"\n");
+
+ /*
+ * The mapfile allows multiple CPUids to point to the same JSON file,
+ * so, not sure if there is a need for symlinks within the pmu-events
+ * directory.
+ *
+ * For now, treat symlinks of JSON files as regular files and create
+ * separate tables for each symlink (presumably, each symlink refers
+ * to specific version of the CPU).
+ */
+
+ maxfds = get_maxfds();
+ rc = nftw(ldirname, preprocess_arch_std_files, maxfds, 0);
+ if (rc)
+ goto err_processing_std_arch_event_dir;
+
+ rc = nftw(ldirname, process_one_file, maxfds, 0);
+ if (rc)
+ goto err_processing_dir;
+
+ sprintf(ldirname, "%s/test", start_dirname);
+
+ rc = nftw(ldirname, process_one_file, maxfds, 0);
+ if (rc)
+ goto err_processing_dir;
+
+ if (close_table)
+ print_events_table_suffix(eventsfp);
+
+ if (!mapfile) {
+ pr_info("%s: No CPU->JSON mapping?\n", prog);
+ empty_map = 1;
+ goto err_close_eventsfp;
+ }
+
+ rc = process_mapfile(eventsfp, mapfile);
+ fclose(eventsfp);
+ if (rc) {
+ pr_info("%s: Error processing mapfile %s\n", prog, mapfile);
+ /* Make build fail */
+ ret = 1;
+ goto err_out;
+ }
+
+ free_arch_std_events();
+ free(mapfile);
+ return 0;
+
+err_processing_std_arch_event_dir:
+ err_string_ext = " for std arch event";
+err_processing_dir:
+ if (verbose) {
+ pr_info("%s: Error walking file tree %s%s\n", prog, ldirname,
+ err_string_ext);
+ empty_map = 1;
+ } else if (rc < 0) {
+ ret = 1;
+ } else {
+ empty_map = 1;
+ }
+err_close_eventsfp:
+ fclose(eventsfp);
+ if (empty_map)
+ create_empty_mapping(output_file);
+err_out:
+ free_arch_std_events();
+ free(mapfile);
+ return ret;
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-07-17 01:49:24 +0000