perf-eh_elf/util/metricgroup.c

493 lines
11 KiB
C
Raw Permalink Normal View History

Merge tag 'afs-fixes-20180514' of git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs Pull AFS fixes from David Howells: "Here's a set of patches that fix a number of bugs in the in-kernel AFS client, including: - Fix directory locking to not use individual page locks for directory reading/scanning but rather to use a semaphore on the afs_vnode struct as the directory contents must be read in a single blob and data from different reads must not be mixed as the entire contents may be shuffled about between reads. - Fix address list parsing to handle port specifiers correctly. - Only give up callback records on a server if we actually talked to that server (we might not be able to access a server). - Fix some callback handling bugs, including refcounting, whole-volume callbacks and when callbacks actually get broken in response to a CB.CallBack op. - Fix some server/address rotation bugs, including giving up if we can't probe a server; giving up if a server says it doesn't have a volume, but there are more servers to try. - Fix the decoding of fetched statuses to be OpenAFS compatible. - Fix the handling of server lookups in Cache Manager ops (such as CB.InitCallBackState3) to use a UUID if possible and to handle no server being found. - Fix a bug in server lookup where not all addresses are compared. - Fix the non-encryption of calls that prevents some servers from being accessed (this also requires an AF_RXRPC patch that has already gone in through the net tree). There's also a patch that adds tracepoints to log Cache Manager ops that don't find a matching server, either by UUID or by address" * tag 'afs-fixes-20180514' of git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs: afs: Fix the non-encryption of calls afs: Fix CB.CallBack handling afs: Fix whole-volume callback handling afs: Fix afs_find_server search loop afs: Fix the handling of an unfound server in CM operations afs: Add a tracepoint to record callbacks from unlisted servers afs: Fix the handling of CB.InitCallBackState3 to find the server by UUID afs: Fix VNOVOL handling in address rotation afs: Fix AFSFetchStatus decoder to provide OpenAFS compatibility afs: Fix server rotation's handling of fileserver probe failure afs: Fix refcounting in callback registration afs: Fix giving up callbacks on server destruction afs: Fix address list parsing afs: Fix directory page locking
2018-05-15 19:48:36 +02:00
/*
* Copyright (c) 2017, Intel Corporation.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
*/
/* Manage metrics and groups of metrics from JSON files */
#include "metricgroup.h"
#include "evlist.h"
#include "strbuf.h"
#include "pmu.h"
#include "expr.h"
#include "rblist.h"
#include <string.h>
#include <stdbool.h>
#include <errno.h>
#include "pmu-events/pmu-events.h"
#include "strlist.h"
#include <assert.h>
#include <ctype.h>
struct metric_event *metricgroup__lookup(struct rblist *metric_events,
struct perf_evsel *evsel,
bool create)
{
struct rb_node *nd;
struct metric_event me = {
.evsel = evsel
};
if (!metric_events)
return NULL;
nd = rblist__find(metric_events, &me);
if (nd)
return container_of(nd, struct metric_event, nd);
if (create) {
rblist__add_node(metric_events, &me);
nd = rblist__find(metric_events, &me);
if (nd)
return container_of(nd, struct metric_event, nd);
}
return NULL;
}
static int metric_event_cmp(struct rb_node *rb_node, const void *entry)
{
struct metric_event *a = container_of(rb_node,
struct metric_event,
nd);
const struct metric_event *b = entry;
if (a->evsel == b->evsel)
return 0;
if ((char *)a->evsel < (char *)b->evsel)
return -1;
return +1;
}
static struct rb_node *metric_event_new(struct rblist *rblist __maybe_unused,
const void *entry)
{
struct metric_event *me = malloc(sizeof(struct metric_event));
if (!me)
return NULL;
memcpy(me, entry, sizeof(struct metric_event));
me->evsel = ((struct metric_event *)entry)->evsel;
INIT_LIST_HEAD(&me->head);
return &me->nd;
}
static void metricgroup__rblist_init(struct rblist *metric_events)
{
rblist__init(metric_events);
metric_events->node_cmp = metric_event_cmp;
metric_events->node_new = metric_event_new;
}
struct egroup {
struct list_head nd;
int idnum;
const char **ids;
const char *metric_name;
const char *metric_expr;
};
static struct perf_evsel *find_evsel(struct perf_evlist *perf_evlist,
const char **ids,
int idnum,
struct perf_evsel **metric_events)
{
struct perf_evsel *ev, *start = NULL;
int ind = 0;
evlist__for_each_entry (perf_evlist, ev) {
if (!strcmp(ev->name, ids[ind])) {
metric_events[ind] = ev;
if (ind == 0)
start = ev;
if (++ind == idnum) {
metric_events[ind] = NULL;
return start;
}
} else {
ind = 0;
start = NULL;
}
}
/*
* This can happen when an alias expands to multiple
* events, like for uncore events.
* We don't support this case for now.
*/
return NULL;
}
static int metricgroup__setup_events(struct list_head *groups,
struct perf_evlist *perf_evlist,
struct rblist *metric_events_list)
{
struct metric_event *me;
struct metric_expr *expr;
int i = 0;
int ret = 0;
struct egroup *eg;
struct perf_evsel *evsel;
list_for_each_entry (eg, groups, nd) {
struct perf_evsel **metric_events;
metric_events = calloc(sizeof(void *), eg->idnum + 1);
if (!metric_events) {
ret = -ENOMEM;
break;
}
evsel = find_evsel(perf_evlist, eg->ids, eg->idnum,
metric_events);
if (!evsel) {
pr_debug("Cannot resolve %s: %s\n",
eg->metric_name, eg->metric_expr);
continue;
}
for (i = 0; i < eg->idnum; i++)
metric_events[i]->collect_stat = true;
me = metricgroup__lookup(metric_events_list, evsel, true);
if (!me) {
ret = -ENOMEM;
break;
}
expr = malloc(sizeof(struct metric_expr));
if (!expr) {
ret = -ENOMEM;
break;
}
expr->metric_expr = eg->metric_expr;
expr->metric_name = eg->metric_name;
expr->metric_events = metric_events;
list_add(&expr->nd, &me->head);
}
return ret;
}
static bool match_metric(const char *n, const char *list)
{
int len;
char *m;
if (!list)
return false;
if (!strcmp(list, "all"))
return true;
if (!n)
return !strcasecmp(list, "No_group");
len = strlen(list);
m = strcasestr(n, list);
if (!m)
return false;
if ((m == n || m[-1] == ';' || m[-1] == ' ') &&
(m[len] == 0 || m[len] == ';'))
return true;
return false;
}
struct mep {
struct rb_node nd;
const char *name;
struct strlist *metrics;
};
static int mep_cmp(struct rb_node *rb_node, const void *entry)
{
struct mep *a = container_of(rb_node, struct mep, nd);
struct mep *b = (struct mep *)entry;
return strcmp(a->name, b->name);
}
static struct rb_node *mep_new(struct rblist *rl __maybe_unused,
const void *entry)
{
struct mep *me = malloc(sizeof(struct mep));
if (!me)
return NULL;
memcpy(me, entry, sizeof(struct mep));
me->name = strdup(me->name);
if (!me->name)
goto out_me;
me->metrics = strlist__new(NULL, NULL);
if (!me->metrics)
goto out_name;
return &me->nd;
out_name:
free((char *)me->name);
out_me:
free(me);
return NULL;
}
static struct mep *mep_lookup(struct rblist *groups, const char *name)
{
struct rb_node *nd;
struct mep me = {
.name = name
};
nd = rblist__find(groups, &me);
if (nd)
return container_of(nd, struct mep, nd);
rblist__add_node(groups, &me);
nd = rblist__find(groups, &me);
if (nd)
return container_of(nd, struct mep, nd);
return NULL;
}
static void mep_delete(struct rblist *rl __maybe_unused,
struct rb_node *nd)
{
struct mep *me = container_of(nd, struct mep, nd);
strlist__delete(me->metrics);
free((void *)me->name);
free(me);
}
static void metricgroup__print_strlist(struct strlist *metrics, bool raw)
{
struct str_node *sn;
int n = 0;
strlist__for_each_entry (sn, metrics) {
if (raw)
printf("%s%s", n > 0 ? " " : "", sn->s);
else
printf(" %s\n", sn->s);
n++;
}
if (raw)
putchar('\n');
}
void metricgroup__print(bool metrics, bool metricgroups, char *filter,
bool raw)
{
struct pmu_events_map *map = perf_pmu__find_map(NULL);
struct pmu_event *pe;
int i;
struct rblist groups;
struct rb_node *node, *next;
struct strlist *metriclist = NULL;
if (!map)
return;
if (!metricgroups) {
metriclist = strlist__new(NULL, NULL);
if (!metriclist)
return;
}
rblist__init(&groups);
groups.node_new = mep_new;
groups.node_cmp = mep_cmp;
groups.node_delete = mep_delete;
for (i = 0; ; i++) {
const char *g;
pe = &map->table[i];
if (!pe->name && !pe->metric_group && !pe->metric_name)
break;
if (!pe->metric_expr)
continue;
g = pe->metric_group;
if (!g && pe->metric_name) {
if (pe->name)
continue;
g = "No_group";
}
if (g) {
char *omg;
char *mg = strdup(g);
if (!mg)
return;
omg = mg;
while ((g = strsep(&mg, ";")) != NULL) {
struct mep *me;
char *s;
if (*g == 0)
g = "No_group";
while (isspace(*g))
g++;
if (filter && !strstr(g, filter))
continue;
if (raw)
s = (char *)pe->metric_name;
else {
if (asprintf(&s, "%s\n\t[%s]",
pe->metric_name, pe->desc) < 0)
return;
}
if (!s)
continue;
if (!metricgroups) {
strlist__add(metriclist, s);
} else {
me = mep_lookup(&groups, g);
if (!me)
continue;
strlist__add(me->metrics, s);
}
}
free(omg);
}
}
if (metricgroups && !raw)
printf("\nMetric Groups:\n\n");
else if (metrics && !raw)
printf("\nMetrics:\n\n");
for (node = rb_first(&groups.entries); node; node = next) {
struct mep *me = container_of(node, struct mep, nd);
if (metricgroups)
printf("%s%s%s", me->name, metrics ? ":" : "", raw ? " " : "\n");
if (metrics)
metricgroup__print_strlist(me->metrics, raw);
next = rb_next(node);
rblist__remove_node(&groups, node);
}
if (!metricgroups)
metricgroup__print_strlist(metriclist, raw);
strlist__delete(metriclist);
}
static int metricgroup__add_metric(const char *metric, struct strbuf *events,
struct list_head *group_list)
{
struct pmu_events_map *map = perf_pmu__find_map(NULL);
struct pmu_event *pe;
int ret = -EINVAL;
int i, j;
if (!map)
return 0;
for (i = 0; ; i++) {
pe = &map->table[i];
if (!pe->name && !pe->metric_group && !pe->metric_name)
break;
if (!pe->metric_expr)
continue;
if (match_metric(pe->metric_group, metric) ||
match_metric(pe->metric_name, metric)) {
const char **ids;
int idnum;
struct egroup *eg;
pr_debug("metric expr %s for %s\n", pe->metric_expr, pe->metric_name);
if (expr__find_other(pe->metric_expr,
NULL, &ids, &idnum) < 0)
continue;
if (events->len > 0)
strbuf_addf(events, ",");
for (j = 0; j < idnum; j++) {
pr_debug("found event %s\n", ids[j]);
strbuf_addf(events, "%s%s",
j == 0 ? "{" : ",",
ids[j]);
}
strbuf_addf(events, "}:W");
eg = malloc(sizeof(struct egroup));
if (!eg) {
ret = -ENOMEM;
break;
}
eg->ids = ids;
eg->idnum = idnum;
eg->metric_name = pe->metric_name;
eg->metric_expr = pe->metric_expr;
list_add_tail(&eg->nd, group_list);
ret = 0;
}
}
return ret;
}
static int metricgroup__add_metric_list(const char *list, struct strbuf *events,
struct list_head *group_list)
{
char *llist, *nlist, *p;
int ret = -EINVAL;
nlist = strdup(list);
if (!nlist)
return -ENOMEM;
llist = nlist;
strbuf_init(events, 100);
strbuf_addf(events, "%s", "");
while ((p = strsep(&llist, ",")) != NULL) {
ret = metricgroup__add_metric(p, events, group_list);
if (ret == -EINVAL) {
fprintf(stderr, "Cannot find metric or group `%s'\n",
p);
break;
}
}
free(nlist);
return ret;
}
static void metricgroup__free_egroups(struct list_head *group_list)
{
struct egroup *eg, *egtmp;
int i;
list_for_each_entry_safe (eg, egtmp, group_list, nd) {
for (i = 0; i < eg->idnum; i++)
free((char *)eg->ids[i]);
free(eg->ids);
free(eg);
}
}
int metricgroup__parse_groups(const struct option *opt,
const char *str,
struct rblist *metric_events)
{
struct parse_events_error parse_error;
struct perf_evlist *perf_evlist = *(struct perf_evlist **)opt->value;
struct strbuf extra_events;
LIST_HEAD(group_list);
int ret;
if (metric_events->nr_entries == 0)
metricgroup__rblist_init(metric_events);
ret = metricgroup__add_metric_list(str, &extra_events, &group_list);
if (ret)
return ret;
pr_debug("adding %s\n", extra_events.buf);
memset(&parse_error, 0, sizeof(struct parse_events_error));
ret = parse_events(perf_evlist, extra_events.buf, &parse_error);
if (ret) {
parse_events_print_error(&parse_error, extra_events.buf);
goto out;
}
strbuf_release(&extra_events);
ret = metricgroup__setup_events(&group_list, perf_evlist,
metric_events);
out:
metricgroup__free_egroups(&group_list);
return ret;
}