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Date: Fri, 18 Nov 2011 12:24:02 -0200
From: Arnaldo Carvalho de Melo <acme@...hat.com>
To: Jiri Olsa <jolsa@...hat.com>
Cc: a.p.zijlstra@...llo.nl, mingo@...e.hu, paulus@...ba.org,
linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/5] perf tool: Fix session host_nachine retrieval
Em Fri, Nov 18, 2011 at 02:46:41PM +0100, Jiri Olsa escreveu:
> The host_machine is statically included inside perf_session struct
> so it is always present.
>
> Changing function:
> 'perf_session__find_host_machine' to 'perf_session__host_machine'
>
> Removing NULL checking code after this function, since it is not needed.
I'm working on finding the machine in perf_session__process_events and
then passing it to the perf_event_ops methods, will fold this in there.
> Signed-off-by: Jiri Olsa <jolsa@...hat.com>
> ---
> tools/perf/builtin-inject.c | 6 +-----
> tools/perf/builtin-kmem.c | 12 +++++-------
> tools/perf/builtin-record.c | 6 +-----
> tools/perf/builtin-top.c | 4 ++--
> tools/perf/util/event.c | 14 +++++---------
> tools/perf/util/session.h | 6 +++---
> 6 files changed, 17 insertions(+), 31 deletions(-)
>
> diff --git a/tools/perf/builtin-inject.c b/tools/perf/builtin-inject.c
> index 8dfc12b..3c5eb3a 100644
> --- a/tools/perf/builtin-inject.c
> +++ b/tools/perf/builtin-inject.c
> @@ -111,11 +111,7 @@ static int dso__inject_build_id(struct dso *self, struct perf_session *session)
> return -1;
> }
>
> - machine = perf_session__find_host_machine(session);
> - if (machine == NULL) {
> - pr_err("Can't find machine for session\n");
> - return -1;
> - }
> + machine = perf_session__host_machine(session);
>
> if (self->kernel)
> misc = PERF_RECORD_MISC_KERNEL;
> diff --git a/tools/perf/builtin-kmem.c b/tools/perf/builtin-kmem.c
> index 225e963..2ca8206 100644
> --- a/tools/perf/builtin-kmem.c
> +++ b/tools/perf/builtin-kmem.c
> @@ -342,7 +342,6 @@ static void __print_result(struct rb_root *root, struct perf_session *session,
> int n_lines, int is_caller)
> {
> struct rb_node *next;
> - struct machine *machine;
>
> printf("%.102s\n", graph_dotted_line);
> printf(" %-34s |", is_caller ? "Callsite": "Alloc Ptr");
> @@ -351,11 +350,6 @@ static void __print_result(struct rb_root *root, struct perf_session *session,
>
> next = rb_first(root);
>
> - machine = perf_session__find_host_machine(session);
> - if (!machine) {
> - pr_err("__print_result: couldn't find kernel information\n");
> - return;
> - }
> while (next && n_lines--) {
> struct alloc_stat *data = rb_entry(next, struct alloc_stat,
> node);
> @@ -366,8 +360,12 @@ static void __print_result(struct rb_root *root, struct perf_session *session,
>
> if (is_caller) {
> addr = data->call_site;
> - if (!raw_ip)
> + if (!raw_ip) {
> + struct machine *machine;
> +
> + machine = perf_session__host_machine(session);
> sym = machine__find_kernel_function(machine, addr, &map, NULL);
> + }
> } else
> addr = data->ptr;
>
> diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c
> index 6ab58cc..1132e70 100644
> --- a/tools/perf/builtin-record.c
> +++ b/tools/perf/builtin-record.c
> @@ -662,11 +662,7 @@ static int __cmd_record(int argc, const char **argv)
> }
> }
>
> - machine = perf_session__find_host_machine(session);
> - if (!machine) {
> - pr_err("Couldn't find native kernel information.\n");
> - return -1;
> - }
> + machine = perf_session__host_machine(session);
>
> err = perf_event__synthesize_kernel_mmap(process_synthesized_event,
> session, machine, "_text");
> diff --git a/tools/perf/builtin-top.c b/tools/perf/builtin-top.c
> index c9cdedb..8e02027 100644
> --- a/tools/perf/builtin-top.c
> +++ b/tools/perf/builtin-top.c
> @@ -692,13 +692,13 @@ static void perf_event__process_sample(const union perf_event *event,
> ++top.us_samples;
> if (top.hide_user_symbols)
> return;
> - machine = perf_session__find_host_machine(session);
> + machine = perf_session__host_machine(session);
> break;
> case PERF_RECORD_MISC_KERNEL:
> ++top.kernel_samples;
> if (top.hide_kernel_symbols)
> return;
> - machine = perf_session__find_host_machine(session);
> + machine = perf_session__host_machine(session);
> break;
> case PERF_RECORD_MISC_GUEST_KERNEL:
> ++top.guest_kernel_samples;
> diff --git a/tools/perf/util/event.c b/tools/perf/util/event.c
> index 437f8ca..35817fa 100644
> --- a/tools/perf/util/event.c
> +++ b/tools/perf/util/event.c
> @@ -589,12 +589,12 @@ int perf_event__process_mmap(union perf_event *event,
> return 0;
> }
>
> - machine = perf_session__find_host_machine(session);
> - if (machine == NULL)
> - goto out_problem;
> thread = perf_session__findnew(session, event->mmap.pid);
> if (thread == NULL)
> goto out_problem;
> +
> + machine = perf_session__host_machine(session);
> +
> map = map__new(&machine->user_dsos, event->mmap.start,
> event->mmap.len, event->mmap.pgoff,
> event->mmap.pid, event->mmap.filename,
> @@ -672,15 +672,11 @@ void thread__find_addr_map(struct thread *self,
>
> if (cpumode == PERF_RECORD_MISC_KERNEL && perf_host) {
> al->level = 'k';
> - machine = perf_session__find_host_machine(session);
> - if (machine == NULL) {
> - al->map = NULL;
> - return;
> - }
> + machine = perf_session__host_machine(session);
> mg = &machine->kmaps;
> } else if (cpumode == PERF_RECORD_MISC_USER && perf_host) {
> al->level = '.';
> - machine = perf_session__find_host_machine(session);
> + machine = perf_session__host_machine(session);
> } else if (cpumode == PERF_RECORD_MISC_GUEST_KERNEL && perf_guest) {
> al->level = 'g';
> machine = perf_session__find_machine(session, pid);
> diff --git a/tools/perf/util/session.h b/tools/perf/util/session.h
> index 6e393c9..a81d666 100644
> --- a/tools/perf/util/session.h
> +++ b/tools/perf/util/session.h
> @@ -121,7 +121,7 @@ void perf_session__update_sample_type(struct perf_session *self);
> void perf_session__remove_thread(struct perf_session *self, struct thread *th);
>
> static inline
> -struct machine *perf_session__find_host_machine(struct perf_session *self)
> +struct machine *perf_session__host_machine(struct perf_session *self)
> {
> return &self->host_machine;
> }
> @@ -130,7 +130,7 @@ static inline
> struct machine *perf_session__find_machine(struct perf_session *self, pid_t pid)
> {
> if (pid == HOST_KERNEL_ID)
> - return &self->host_machine;
> + return perf_session__host_machine(self);
> return machines__find(&self->machines, pid);
> }
>
> @@ -138,7 +138,7 @@ static inline
> struct machine *perf_session__findnew_machine(struct perf_session *self, pid_t pid)
> {
> if (pid == HOST_KERNEL_ID)
> - return &self->host_machine;
> + return perf_session__host_machine(self);
> return machines__findnew(&self->machines, pid);
> }
>
> --
> 1.7.4
--
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