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perf tools: Introduce perf_session class

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That does all the initialization boilerplate, opening the file,
reading the header, checking if it is valid, etc.

And that will as well have the threads list, kmap (now) global
variable, etc, so that we can handle two (or more) perf.data files
describing sessions to compare.

Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Frédéric Weisbecker <fweisbec@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
LKML-Reference: <1260573842-19720-1-git-send-email-acme@infradead.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Arnaldo Carvalho de Melo
2009-12-11 21:24:02 -02:00
committed by Ingo Molnar
parent ea08d8cbd1
commit 94c744b6c0
15 changed files with 206 additions and 181 deletions
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20
tools/perf/builtin-trace.c
View File

@@ -7,6 +7,7 @@
#include "util/header.h"
#include "util/exec_cmd.h"
#include "util/trace-event.h"
#include "util/session.h"
static char const *script_name;
static char const *generate_script_lang;
@@ -61,7 +62,7 @@ static int cleanup_scripting(void)
static char const *input_name = "perf.data";
static struct perf_header *header;
static struct perf_session *session;
static u64 sample_type;
static int process_sample_event(event_t *event)
@@ -126,11 +127,18 @@ static struct perf_file_handler file_handler = {
static int __cmd_trace(void)
{
int err;
session = perf_session__new(input_name, O_RDONLY, 0);
if (session == NULL)
return -ENOMEM;
register_idle_thread();
register_perf_file_handler(&file_handler);
return mmap_dispatch_perf_file(&header, input_name,
0, 0, &event__cwdlen, &event__cwd);
err = perf_session__process_events(session, 0, &event__cwdlen, &event__cwd);
perf_session__delete(session);
return err;
}
struct script_spec {
@@ -348,11 +356,7 @@ int cmd_trace(int argc, const char **argv, const char *prefix __used)
return -1;
}
header = perf_header__new();
if (header == NULL)
return -1;
perf_header__read(header, input);
perf_header__read(&session->header, input);
err = scripting_ops->generate_script("perf-trace");
goto out;
}