[tip:perfcounters/core] perf report: Tidy up the "--parent " and "--sort parent" call-chain features

tip-bot for Ingo Molnar
2009-06-18T06:28:20Z

Commit-ID: b25bcf2f133b1e6216c3d40be394756107d3880f
Gitweb: http://git.kernel.org/tip/b25bcf2f133b1e6216c3d40be394756107d3880f
Author: Ingo Molnar <mingo@elte.hu>
AuthorDate: Thu, 18 Jun 2009 07:01:03 +0200
Committer: Ingo Molnar <mingo@elte.hu>
CommitDate: Thu, 18 Jun 2009 07:21:54 +0200

perf report: Tidy up the "--parent <regex>" and "--sort parent" call-chain features

Instead of the ambigious 'call' naming use the much more
specific 'parent' naming:

- rename --call <regex> to --parent <regex>

- rename --sort call to --sort parent

- rename [unmatched] to [other] - to signal that this is not
an error but the inverse set

Also add pagefaults to the default parent-symbol pattern too,
as it's a 'syscall overhead category' in a sense.

Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
LKML-Reference: <new-submission>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

---
tools/perf/builtin-report.c | 67 ++++++++++++++++++++++---------------------
1 files changed, 34 insertions(+), 33 deletions(-)

diff --git a/tools/perf/builtin-report.c b/tools/perf/builtin-report.c
index 707f60c..9868346 100644
--- a/tools/perf/builtin-report.c
+++ b/tools/perf/builtin-report.c
@@ -44,8 +44,8 @@ static int full_paths;
static unsigned long page_size;
static unsigned long mmap_window = 32;

-static char *call = "^sys_";
-static regex_t call_regex;
+static char *parent_pattern = "^sys_|^do_page_fault";
+static regex_t parent_regex;

struct ip_chain_event {
__u16 nr;
@@ -465,7 +465,7 @@ struct hist_entry {
struct map *map;
struct dso *dso;
struct symbol *sym;
- struct symbol *call;
+ struct symbol *parent;
__u64 ip;
char level;

@@ -618,13 +618,13 @@ static struct sort_entry sort_sym = {
.print = sort__sym_print,
};

-/* --sort call */
+/* --sort parent */

static int64_t
-sort__call_cmp(struct hist_entry *left, struct hist_entry *right)
+sort__parent_cmp(struct hist_entry *left, struct hist_entry *right)
{
- struct symbol *sym_l = left->call;
- struct symbol *sym_r = right->call;
+ struct symbol *sym_l = left->parent;
+ struct symbol *sym_r = right->parent;

if (!sym_l || !sym_r)
return cmp_null(sym_l, sym_r);
@@ -633,23 +633,23 @@ sort__call_cmp(struct hist_entry *left, struct hist_entry *right)
}

static size_t
-sort__call_print(FILE *fp, struct hist_entry *self)
+sort__parent_print(FILE *fp, struct hist_entry *self)
{
size_t ret = 0;

- ret += fprintf(fp, "%-20s", self->call ? self->call->name : "[unmatched]");
+ ret += fprintf(fp, "%-20s", self->parent ? self->parent->name : "[other]");

return ret;
}

-static struct sort_entry sort_call = {
- .header = "Callchain symbol ",
- .cmp = sort__call_cmp,
- .print = sort__call_print,
+static struct sort_entry sort_parent = {
+ .header = "Parent symbol ",
+ .cmp = sort__parent_cmp,
+ .print = sort__parent_print,
};

static int sort__need_collapse = 0;
-static int sort__has_call = 0;
+static int sort__has_parent = 0;

struct sort_dimension {
char *name;
@@ -662,7 +662,7 @@ static struct sort_dimension sort_dimensions[] = {
{ .name = "comm", .entry = &sort_comm, },
{ .name = "dso", .entry = &sort_dso, },
{ .name = "symbol", .entry = &sort_sym, },
- { .name = "call", .entry = &sort_call, },
+ { .name = "parent", .entry = &sort_parent, },
};

static LIST_HEAD(hist_entry__sort_list);
@@ -683,16 +683,17 @@ static int sort_dimension__add(char *tok)
if (sd->entry->collapse)
sort__need_collapse = 1;

- if (sd->entry == &sort_call) {
- int ret = regcomp(&call_regex, call, REG_EXTENDED);
+ if (sd->entry == &sort_parent) {
+ int ret = regcomp(&parent_regex, parent_pattern, REG_EXTENDED);
if (ret) {
char err[BUFSIZ];

- regerror(ret, &call_regex, err, sizeof(err));
- fprintf(stderr, "Invalid regex: %s\n%s", call, err);
+ regerror(ret, &parent_regex, err, sizeof(err));
+ fprintf(stderr, "Invalid regex: %s\n%s",
+ parent_pattern, err);
exit(-1);
}
- sort__has_call = 1;
+ sort__has_parent = 1;
}

list_add_tail(&sd->entry->list, &hist_entry__sort_list);
@@ -831,7 +832,7 @@ static struct symbol *call__match(struct symbol *sym)
if (!sym)
return NULL;

- if (sym->name && !regexec(&call_regex, sym->name, 0, NULL, 0))
+ if (sym->name && !regexec(&parent_regex, sym->name, 0, NULL, 0))
return sym;

return NULL;
@@ -844,7 +845,7 @@ static struct symbol *call__match(struct symbol *sym)
static int
hist_entry__add(struct thread *thread, struct map *map, struct dso *dso,
struct symbol *sym, __u64 ip, struct ip_chain_event *chain,
- char level, __u64 count)
+ char level, __u64 count)
{
struct rb_node **p = &hist.rb_node;
struct rb_node *parent = NULL;
@@ -860,7 +861,7 @@ hist_entry__add(struct thread *thread, struct map *map, struct dso *dso,
};
int cmp;

- if (sort__has_call && chain) {
+ if (sort__has_parent && chain) {
int i, nr = chain->hv;
struct symbol *sym;
struct dso *dso;
@@ -870,22 +871,22 @@ hist_entry__add(struct thread *thread, struct map *map, struct dso *dso,
ip = chain->ips[nr + i];
dso = kernel_dso;
sym = resolve_symbol(thread, NULL, &dso, &ip);
- entry.call = call__match(sym);
- if (entry.call)
- goto got_call;
+ entry.parent = call__match(sym);
+ if (entry.parent)
+ goto got_parent;
}
nr += i;

for (i = 0; i < chain->user; i++) {
ip = chain->ips[nr + i];
sym = resolve_symbol(thread, NULL, NULL, &ip);
- entry.call = call__match(sym);
- if (entry.call)
- goto got_call;
+ entry.parent = call__match(sym);
+ if (entry.parent)
+ goto got_parent;
}
nr += i;
}
-got_call:
+got_parent:

while (*p != NULL) {
parent = *p;
@@ -1457,11 +1458,11 @@ static const struct option options[] = {
"dump raw trace in ASCII"),
OPT_STRING('k', "vmlinux", &vmlinux, "file", "vmlinux pathname"),
OPT_STRING('s', "sort", &sort_order, "key[,key2...]",
- "sort by key(s): pid, comm, dso, symbol. Default: pid,symbol"),
+ "sort by key(s): pid, comm, dso, symbol, parent"),
OPT_BOOLEAN('P', "full-paths", &full_paths,
"Don't shorten the pathnames taking into account the cwd"),
- OPT_STRING('c', "call", &call, "regex",
- "regex to use for --sort call"),
+ OPT_STRING('p', "parent", &parent_pattern, "regex",
+ "regex filter to identify parent, see: '--sort parent'"),
OPT_END()
};