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perf_counter tools: Shorten the DSO names using cwd

Browse source 
[acme@emilia linux-2.6-tip]$ pwd
/home/acme/git/linux-2.6-tip

Before (still available using -P/--full-paths)

[acme@emilia linux-2.6-tip]$ perf report -P | head -10
    11.48%             perf: 7454 [kernel]: clear_page_c
     4.89%             perf: 7454 [kernel]: vsnprintf
     4.61%             perf: 7454 /home/acme/git/linux-2.6-tip/Documentation/perf_counter/perf: dso__find_symbol
     4.09%             perf: 7454 [kernel]: number
     4.06%             perf: 7454 /home/acme/git/linux-2.6-tip/Documentation/perf_counter/perf: dso__fprintf
     4.00%             perf: 7454 /home/acme/git/linux-2.6-tip/Documentation/perf_counter/perf: symbol_filter

New default:

[acme@emilia linux-2.6-tip]$ perf report | head -10
    11.48%             perf: 7454 [kernel]: clear_page_c
     4.89%             perf: 7454 [kernel]: vsnprintf
     4.61%             perf: 7454 ./Documentation/perf_counter/perf: dso__find_symbol
     4.09%             perf: 7454 [kernel]: number
     4.06%             perf: 7454 ./Documentation/perf_counter/perf: dso__fprintf
     4.00%             perf: 7454 ./Documentation/perf_counter/perf: symbol_filter

Suggested-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Steven Rostedt <rostedt@goodmis.org>
LKML-Reference: <20090529164859.GN4747@ghostprotocols.net>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Arnaldo Carvalho de Melo 2009-05-29 13:48:59 -03:00 committed by Ingo Molnar
parent bbbee90829
commit b78c07d45a
1 changed files with 38 additions and 3 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

41
Documentation/perf_counter/builtin-report.c
View file

@ -23,6 +23,7 @@ static int show_mask = SHOW_KERNEL | SHOW_USER | SHOW_HV;
static int dump_trace = 0;
static int verbose;
static int full_paths;
static unsigned long page_size;
static unsigned long mmap_window = 32;
@ -134,6 +135,16 @@ static int load_kernel(void)
return err;
}
static int strcommon(const char *pathname, const char *cwd, int cwdlen)
{
int n = 0;
while (pathname[n] == cwd[n] && n < cwdlen)
++n;
return n;
}
struct map {
struct list_head node;
uint64_t start;
@ -142,16 +153,28 @@ struct map {
struct dso *dso;
};
static struct map *map__new(struct mmap_event *event)
static struct map *map__new(struct mmap_event *event, char *cwd, int cwdlen)
{
struct map *self = malloc(sizeof(*self));
if (self != NULL) {
const char *filename = event->filename;
char newfilename[PATH_MAX];
if (cwd) {
int n = strcommon(filename, cwd, cwdlen);
if (n == cwdlen) {
snprintf(newfilename, sizeof(newfilename),
".%s", filename + n);
filename = newfilename;
}
}
self->start = event->start;
self->end = event->start + event->len;
self->pgoff = event->pgoff;
self->dso = dsos__findnew(event->filename);
self->dso = dsos__findnew(filename);
if (self->dso == NULL)
goto out_delete;
}
@ -598,6 +621,8 @@ static int __cmd_report(void)
int ret, rc = EXIT_FAILURE;
uint32_t size;
unsigned long total = 0, total_mmap = 0, total_comm = 0, total_unknown = 0;
char cwd[PATH_MAX], *cwdp = cwd;
int cwdlen;
input = open(input_name, O_RDONLY);
if (input < 0) {
@ -621,6 +646,14 @@ static int __cmd_report(void)
return EXIT_FAILURE;
}
if (!full_paths) {
if (getcwd(cwd, sizeof(cwd)) == NULL) {
perror("failed to get the current directory");
return EXIT_FAILURE;
}
cwdlen = strlen(cwd);
} else
cwdp = NULL;
remap:
buf = (char *)mmap(NULL, page_size * mmap_window, PROT_READ,
MAP_SHARED, input, offset);
@ -710,7 +743,7 @@ static int __cmd_report(void)
} else switch (event->header.type) {
case PERF_EVENT_MMAP: {
struct thread *thread = threads__findnew(event->mmap.pid);
struct map *map = map__new(&event->mmap);
struct map *map = map__new(&event->mmap, cwdp, cwdlen);
if (dump_trace) {
fprintf(stderr, "%p [%p]: PERF_EVENT_MMAP: [%p(%p) @ %p]: %s\n",
@ -809,6 +842,8 @@ static const struct option options[] = {
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"),
OPT_BOOLEAN('P', "full-paths", &full_paths,
"Don't shorten the pathnames taking into account the cwd"),
OPT_END()
};