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perf diff: Change diff command to work over multiple data files

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Adding diff command the flexibility to specify multiple data files on
input. If not input file is given the standard behaviour stands and diff
inspects 'perf.data' and 'perf.data.old' files.

Signed-off-by: Jiri Olsa <jolsa@redhat.com>
Reviewed-by: Namhyung Kim <namhyung@kernel.org>
Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/n/tip-8j3xer54ltvs76t0fh01gcvu@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Jiri Olsa 2012-12-01 22:00:00 +01:00 committed by Arnaldo Carvalho de Melo
parent c818b49820
commit 22aeb7f597
1 changed files with 67 additions and 34 deletions
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101
tools/perf/builtin-diff.c
View file

@ -44,6 +44,7 @@ struct data__file {
struct perf_session *session;
const char *file;
int idx;
struct hists *hists;
struct diff_hpp_fmt fmt[PERF_HPP_DIFF__MAX_INDEX];
};
@ -56,6 +57,7 @@ static int data__files_cnt;
i++, d = &data__files[i])
#define data__for_each_file(i, d) data__for_each_file_start(i, d, 0)
#define data__for_each_file_new(i, d) data__for_each_file_start(i, d, 1)
static char diff__default_sort_order[] = "dso,symbol";
static bool force;
@ -525,23 +527,19 @@ static void hists__compute_resort(struct hists *hists)
}
}
static void hists__process(struct hists *base, struct hists *new)
static void hists__process(struct hists *hists)
{
hists__match(base, new);
if (show_baseline_only)
hists__baseline_only(base);
else
hists__link(base, new);
hists__baseline_only(hists);
if (sort_compute) {
hists__precompute(base);
hists__compute_resort(base);
hists__precompute(hists);
hists__compute_resort(hists);
} else {
hists__output_resort(base);
hists__output_resort(hists);
}
hists__fprintf(base, true, 0, 0, 0, stdout);
hists__fprintf(hists, true, 0, 0, 0, stdout);
}
static void data__fprintf(void)
@ -561,27 +559,40 @@ static void data__fprintf(void)
static void data_process(void)
{
struct perf_evlist *evlist_old = data__files[0].session->evlist;
struct perf_evlist *evlist_new = data__files[1].session->evlist;
struct perf_evsel *evsel_old;
struct perf_evlist *evlist_base = data__files[0].session->evlist;
struct perf_evsel *evsel_base;
bool first = true;
list_for_each_entry(evsel_old, &evlist_old->entries, node) {
struct perf_evsel *evsel_new;
list_for_each_entry(evsel_base, &evlist_base->entries, node) {
struct data__file *d;
int i;
evsel_new = evsel_match(evsel_old, evlist_new);
if (!evsel_new)
continue;
data__for_each_file_new(i, d) {
struct perf_evlist *evlist = d->session->evlist;
struct perf_evsel *evsel;
evsel = evsel_match(evsel_base, evlist);
if (!evsel)
continue;
d->hists = &evsel->hists;
hists__match(&evsel_base->hists, &evsel->hists);
if (!show_baseline_only)
hists__link(&evsel_base->hists,
&evsel->hists);
}
fprintf(stdout, "%s# Event '%s'\n#\n", first ? "" : "\n",
perf_evsel__name(evsel_old));
perf_evsel__name(evsel_base));
first = false;
if (verbose)
if (verbose || data__files_cnt > 2)
data__fprintf();
hists__process(&evsel_old->hists, &evsel_new->hists);
hists__process(&evsel_base->hists);
}
}
@ -780,10 +791,29 @@ hpp__entry_pair(struct hist_entry *he, struct hist_entry *pair,
};
}
static void
__hpp__entry_global(struct hist_entry *he, int idx, char *buf, size_t size)
static struct hist_entry *get_pair(struct hist_entry *he,
struct diff_hpp_fmt *dfmt)
{
struct hist_entry *pair = hist_entry__next_pair(he);
void *ptr = dfmt - dfmt->idx;
struct data__file *d = container_of(ptr, struct data__file, fmt);
if (hist_entry__has_pairs(he)) {
struct hist_entry *pair;
list_for_each_entry(pair, &he->pairs.head, pairs.node)
if (pair->hists == d->hists)
return pair;
}
return NULL;
}
static void
__hpp__entry_global(struct hist_entry *he, struct diff_hpp_fmt *dfmt,
char *buf, size_t size)
{
struct hist_entry *pair = get_pair(he, dfmt);
int idx = dfmt->idx;
/* baseline is special */
if (idx == PERF_HPP_DIFF__BASELINE)
@ -803,7 +833,7 @@ static int hpp__entry_global(struct perf_hpp_fmt *_fmt, struct perf_hpp *hpp,
container_of(_fmt, struct diff_hpp_fmt, fmt);
char buf[MAX_COL_WIDTH] = " ";
__hpp__entry_global(he, dfmt->idx, buf, MAX_COL_WIDTH);
__hpp__entry_global(he, dfmt, buf, MAX_COL_WIDTH);
if (symbol_conf.field_sep)
return scnprintf(hpp->buf, hpp->size, "%s", buf);
@ -832,7 +862,7 @@ static int hpp__width(struct perf_hpp_fmt *fmt,
return dfmt->header_width;
}
static void init_header(struct diff_hpp_fmt *dfmt)
static void init_header(struct data__file *d, struct diff_hpp_fmt *dfmt)
{
#define MAX_HEADER_NAME 100
char buf_indent[MAX_HEADER_NAME];
@ -847,6 +877,9 @@ static void init_header(struct diff_hpp_fmt *dfmt)
/* Only our defined HPP fmts should appear here. */
BUG_ON(!header);
if (data__files_cnt > 2)
scnprintf(buf, MAX_HEADER_NAME, "%s/%d", header, d->idx);
#define NAME (data__files_cnt > 2 ? buf : header)
dfmt->header_width = width;
width = (int) strlen(NAME);
@ -876,7 +909,7 @@ static void data__hpp_register(struct data__file *d, int idx)
if (idx == PERF_HPP_DIFF__BASELINE)
fmt->color = hpp__color_baseline;
init_header(dfmt);
init_header(d, dfmt);
perf_hpp__column_register(fmt);
}
@ -921,18 +954,18 @@ static int data_init(int argc, const char **argv)
"perf.data.old",
"perf.data",
};
bool use_default = true;
int i;
data__files_cnt = 2;
if (argc) {
if (argc > 2)
usage_with_options(diff_usage, options);
if (argc == 2) {
defaults[0] = argv[0];
defaults[1] = argv[1];
} else
if (argc == 1)
defaults[1] = argv[0];
else {
data__files_cnt = argc;
use_default = false;
}
} else if (symbol_conf.default_guest_vmlinux_name ||
symbol_conf.default_guest_kallsyms) {
defaults[0] = "perf.data.host";
@ -944,7 +977,7 @@ static int data_init(int argc, const char **argv)
return -ENOMEM;
data__for_each_file(i, d) {
d->file = defaults[i];
d->file = use_default ? defaults[i] : argv[i];
d->idx = i;
}