Re: [BUG] perf script segfault

From: Arnaldo Carvalho de Melo
Date: Tue Mar 31 2015 - 12:17:06 EST

Em Tue, Mar 31, 2015 at 01:14:20PM -0300, Arnaldo Carvalho de Melo escreveu:
> Em Tue, Mar 31, 2015 at 05:50:48PM +0200, Jiri Olsa escreveu:
> > On Tue, Mar 31, 2015 at 05:48:44PM +0200, Jiri Olsa wrote:
> > > On Tue, Mar 31, 2015 at 11:57:39AM -0300, Arnaldo Carvalho de Melo wrote:
> > >
> > > SNIP
> > >
> > > > struct ordered_events *oe = &session->ordered_events;
> > > > - struct perf_tool *tool = oe->tool;
> > > > + struct perf_tool *tool = session->tool;
> > > > int fd = perf_data_file__fd(session->file);
> > > > u64 head, page_offset, file_offset, file_pos, size;
> > > > int err, mmap_prot, mmap_flags, map_idx = 0;
> > > > @@ -1394,6 +1407,7 @@ out:
> > > > out_err:
> > > > ui_progress__finish();
> > > > perf_tool__warn_about_errors(tool, &session->evlist->stats);
> > > > + ordered_events__warn_about_errors(&session->ordered_events);
> > >
> > > how about just single warning function ?
> > >
> > > perf_session__warn_about_errors(struct perf_session *session)
> > >
> > > session has now both tool and ordered_events
> >
> > other than this it looks ok to me
>
> Like this? If so, can I have your Acked-by? :-)

Out for lunch, put it on the tmp.perf/core branch in my repo,

bbl,

> - Arnaldo
>
> From a6ee71dd2814dff89670b3764ac9fbb897366312 Mon Sep 17 00:00:00 2001
> From: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
> Date: Tue, 31 Mar 2015 12:48:16 -0300
> Subject: [PATCH 1/1] perf ordered_samples: Remove references to
> perf_{evlist,tool} and machines
>
> As these can be obtained from the ordered_events pointer, via
> container_of, reducing the cross section of ordered_samples.
>
> These were added to ordered_samples in:
>
> commit b7b61cbebd789a3dbca522e3fdb727fe5c95593f
> Author: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
> Date: Tue Mar 3 11:58:45 2015 -0300
>
> perf ordered_events: Shorten function signatures
>
> By keeping pointers to machines, evlist and tool in ordered_events.
>
> But that was more a transitional patch while moving stuff out from
> perf_session.c to ordered_events.c and possibly not even needed by then,
> as we could use the container_of() method and instead of having the
> nr_unordered_samples stats in events_stats, we can have it in
> ordered_samples.
>
> Based-on-a-patch-by: Jiri Olsa <jolsa@xxxxxxxxxx>
> Cc: Adrian Hunter <adrian.hunter@xxxxxxxxx>
> Cc: Borislav Petkov <bp@xxxxxxx>
> Cc: David Ahern <dsahern@xxxxxxxxx>
> Cc: Don Zickus <dzickus@xxxxxxxxxx>
> Cc: Frederic Weisbecker <fweisbec@xxxxxxxxx>
> Cc: Namhyung Kim <namhyung@xxxxxxxxxx>
> Cc: Stephane Eranian <eranian@xxxxxxxxxx>
> Link: http://lkml.kernel.org/n/tip-4lk0t9js82g0tfc0x1onpkjt@xxxxxxxxxxxxxx
> Signed-off-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
> ---
> tools/perf/util/event.h | 1 -
> tools/perf/util/ordered-events.c | 21 ++++--------------
> tools/perf/util/ordered-events.h | 14 +++---------
> tools/perf/util/session.c | 47 +++++++++++++++++++++++++---------------
> tools/perf/util/session.h | 1 +
> 5 files changed, 37 insertions(+), 47 deletions(-)
>
> diff --git a/tools/perf/util/event.h b/tools/perf/util/event.h
> index c4ffe2bd0738..09b9e8d3fcf7 100644
> --- a/tools/perf/util/event.h
> +++ b/tools/perf/util/event.h
> @@ -242,7 +242,6 @@ struct events_stats {
> u32 nr_invalid_chains;
> u32 nr_unknown_id;
> u32 nr_unprocessable_samples;
> - u32 nr_unordered_events;
> };
>
> struct attr_event {
> diff --git a/tools/perf/util/ordered-events.c b/tools/perf/util/ordered-events.c
> index 6002fa3fcf77..52be201b9b25 100644
> --- a/tools/perf/util/ordered-events.c
> +++ b/tools/perf/util/ordered-events.c
> @@ -2,7 +2,6 @@
> #include <linux/compiler.h>
> #include <linux/string.h>
> #include "ordered-events.h"
> -#include "evlist.h"
> #include "session.h"
> #include "asm/bug.h"
> #include "debug.h"
> @@ -167,7 +166,7 @@ int ordered_events__queue(struct ordered_events *oe, union perf_event *event,
> pr_oe_time(oe->last_flush, "last flush, last_flush_type %d\n",
> oe->last_flush_type);
>
> - oe->evlist->stats.nr_unordered_events++;
> + oe->nr_unordered_events++;
> }
>
> oevent = ordered_events__new_event(oe, timestamp, event);
> @@ -187,7 +186,6 @@ static int __ordered_events__flush(struct ordered_events *oe)
> {
> struct list_head *head = &oe->events;
> struct ordered_event *tmp, *iter;
> - struct perf_sample sample;
> u64 limit = oe->next_flush;
> u64 last_ts = oe->last ? oe->last->timestamp : 0ULL;
> bool show_progress = limit == ULLONG_MAX;
> @@ -206,15 +204,9 @@ static int __ordered_events__flush(struct ordered_events *oe)
>
> if (iter->timestamp > limit)
> break;
> -
> - ret = perf_evlist__parse_sample(oe->evlist, iter->event, &sample);
> + ret = oe->deliver(oe, iter);
> if (ret)
> - pr_err("Can't parse sample, err = %d\n", ret);
> - else {
> - ret = oe->deliver(oe, iter, &sample);
> - if (ret)
> - return ret;
> - }
> + return ret;
>
> ordered_events__delete(oe, iter);
> oe->last_flush = iter->timestamp;
> @@ -292,18 +284,13 @@ int ordered_events__flush(struct ordered_events *oe, enum oe_flush how)
> return err;
> }
>
> -void ordered_events__init(struct ordered_events *oe, struct machines *machines,
> - struct perf_evlist *evlist, struct perf_tool *tool,
> - ordered_events__deliver_t deliver)
> +void ordered_events__init(struct ordered_events *oe, ordered_events__deliver_t deliver)
> {
> INIT_LIST_HEAD(&oe->events);
> INIT_LIST_HEAD(&oe->cache);
> INIT_LIST_HEAD(&oe->to_free);
> oe->max_alloc_size = (u64) -1;
> oe->cur_alloc_size = 0;
> - oe->evlist = evlist;
> - oe->machines = machines;
> - oe->tool = tool;
> oe->deliver = deliver;
> }
>
> diff --git a/tools/perf/util/ordered-events.h b/tools/perf/util/ordered-events.h
> index 173e13f28c08..f403991e3bfd 100644
> --- a/tools/perf/util/ordered-events.h
> +++ b/tools/perf/util/ordered-events.h
> @@ -3,10 +3,7 @@
>
> #include <linux/types.h>
>
> -struct perf_tool;
> -struct perf_evlist;
> struct perf_sample;
> -struct machines;
>
> struct ordered_event {
> u64 timestamp;
> @@ -25,8 +22,7 @@ enum oe_flush {
> struct ordered_events;
>
> typedef int (*ordered_events__deliver_t)(struct ordered_events *oe,
> - struct ordered_event *event,
> - struct perf_sample *sample);
> + struct ordered_event *event);
>
> struct ordered_events {
> u64 last_flush;
> @@ -39,13 +35,11 @@ struct ordered_events {
> struct list_head to_free;
> struct ordered_event *buffer;
> struct ordered_event *last;
> - struct machines *machines;
> - struct perf_evlist *evlist;
> - struct perf_tool *tool;
> ordered_events__deliver_t deliver;
> int buffer_idx;
> unsigned int nr_events;
> enum oe_flush last_flush_type;
> + u32 nr_unordered_events;
> bool copy_on_queue;
> };
>
> @@ -53,9 +47,7 @@ int ordered_events__queue(struct ordered_events *oe, union perf_event *event,
> struct perf_sample *sample, u64 file_offset);
> void ordered_events__delete(struct ordered_events *oe, struct ordered_event *event);
> int ordered_events__flush(struct ordered_events *oe, enum oe_flush how);
> -void ordered_events__init(struct ordered_events *oe, struct machines *machines,
> - struct perf_evlist *evlsit, struct perf_tool *tool,
> - ordered_events__deliver_t deliver);
> +void ordered_events__init(struct ordered_events *oe, ordered_events__deliver_t deliver);
> void ordered_events__free(struct ordered_events *oe);
>
> static inline
> diff --git a/tools/perf/util/session.c b/tools/perf/util/session.c
> index 89c66797abe4..dfacf1d50162 100644
> --- a/tools/perf/util/session.c
> +++ b/tools/perf/util/session.c
> @@ -93,11 +93,20 @@ static void perf_session__set_comm_exec(struct perf_session *session)
> }
>
> static int ordered_events__deliver_event(struct ordered_events *oe,
> - struct ordered_event *event,
> - struct perf_sample *sample)
> + struct ordered_event *event)
> {
> - return machines__deliver_event(oe->machines, oe->evlist, event->event,
> - sample, oe->tool, event->file_offset);
> + struct perf_sample sample;
> + struct perf_session *session = container_of(oe, struct perf_session,
> + ordered_events);
> + int ret = perf_evlist__parse_sample(session->evlist, event->event, &sample);
> +
> + if (ret) {
> + pr_err("Can't parse sample, err = %d\n", ret);
> + return ret;
> + }
> +
> + return machines__deliver_event(&session->machines, session->evlist, event->event,
> + &sample, session->tool, event->file_offset);
> }
>
> struct perf_session *perf_session__new(struct perf_data_file *file,
> @@ -109,9 +118,9 @@ struct perf_session *perf_session__new(struct perf_data_file *file,
> goto out;
>
> session->repipe = repipe;
> + session->tool = tool;
> machines__init(&session->machines);
> - ordered_events__init(&session->ordered_events, &session->machines,
> - session->evlist, tool, ordered_events__deliver_event);
> + ordered_events__init(&session->ordered_events, ordered_events__deliver_event);
>
> if (file) {
> if (perf_data_file__open(file))
> @@ -940,7 +949,7 @@ static s64 perf_session__process_user_event(struct perf_session *session,
> u64 file_offset)
> {
> struct ordered_events *oe = &session->ordered_events;
> - struct perf_tool *tool = oe->tool;
> + struct perf_tool *tool = session->tool;
> int fd = perf_data_file__fd(session->file);
> int err;
>
> @@ -981,7 +990,7 @@ int perf_session__deliver_synth_event(struct perf_session *session,
> struct perf_sample *sample)
> {
> struct perf_evlist *evlist = session->evlist;
> - struct perf_tool *tool = session->ordered_events.tool;
> + struct perf_tool *tool = session->tool;
>
> events_stats__inc(&evlist->stats, event->header.type);
>
> @@ -1059,7 +1068,7 @@ static s64 perf_session__process_event(struct perf_session *session,
> union perf_event *event, u64 file_offset)
> {
> struct perf_evlist *evlist = session->evlist;
> - struct perf_tool *tool = session->ordered_events.tool;
> + struct perf_tool *tool = session->tool;
> struct perf_sample sample;
> int ret;
>
> @@ -1116,10 +1125,12 @@ static struct thread *perf_session__register_idle_thread(struct perf_session *se
> return thread;
> }
>
> -static void perf_tool__warn_about_errors(const struct perf_tool *tool,
> - const struct events_stats *stats)
> +static void perf_session__warn_about_errors(const struct perf_session *session)
> {
> - if (tool->lost == perf_event__process_lost &&
> + const struct events_stats *stats = &session->evlist->stats;
> + const struct ordered_events *oe = &session->ordered_events;
> +
> + if (session->tool->lost == perf_event__process_lost &&
> stats->nr_events[PERF_RECORD_LOST] != 0) {
> ui__warning("Processed %d events and lost %d chunks!\n\n"
> "Check IO/CPU overload!\n\n",
> @@ -1155,8 +1166,8 @@ static void perf_tool__warn_about_errors(const struct perf_tool *tool,
> stats->nr_unprocessable_samples);
> }
>
> - if (stats->nr_unordered_events != 0)
> - ui__warning("%u out of order events recorded.\n", stats->nr_unordered_events);
> + if (oe->nr_unordered_events != 0)
> + ui__warning("%u out of order events recorded.\n", oe->nr_unordered_events);
> }
>
> volatile int session_done;
> @@ -1164,7 +1175,7 @@ volatile int session_done;
> static int __perf_session__process_pipe_events(struct perf_session *session)
> {
> struct ordered_events *oe = &session->ordered_events;
> - struct perf_tool *tool = oe->tool;
> + struct perf_tool *tool = session->tool;
> int fd = perf_data_file__fd(session->file);
> union perf_event *event;
> uint32_t size, cur_size = 0;
> @@ -1247,7 +1258,7 @@ done:
> err = ordered_events__flush(oe, OE_FLUSH__FINAL);
> out_err:
> free(buf);
> - perf_tool__warn_about_errors(tool, &session->evlist->stats);
> + perf_session__warn_about_errors(session);
> ordered_events__free(&session->ordered_events);
> return err;
> }
> @@ -1297,7 +1308,7 @@ static int __perf_session__process_events(struct perf_session *session,
> u64 file_size)
> {
> struct ordered_events *oe = &session->ordered_events;
> - struct perf_tool *tool = oe->tool;
> + struct perf_tool *tool = session->tool;
> int fd = perf_data_file__fd(session->file);
> u64 head, page_offset, file_offset, file_pos, size;
> int err, mmap_prot, mmap_flags, map_idx = 0;
> @@ -1393,7 +1404,7 @@ out:
> err = ordered_events__flush(oe, OE_FLUSH__FINAL);
> out_err:
> ui_progress__finish();
> - perf_tool__warn_about_errors(tool, &session->evlist->stats);
> + perf_session__warn_about_errors(session);
> ordered_events__free(&session->ordered_events);
> session->one_mmap = false;
> return err;
> diff --git a/tools/perf/util/session.h b/tools/perf/util/session.h
> index 1310998f8318..d5fa7b7916ef 100644
> --- a/tools/perf/util/session.h
> +++ b/tools/perf/util/session.h
> @@ -26,6 +26,7 @@ struct perf_session {
> u64 one_mmap_offset;
> struct ordered_events ordered_events;
> struct perf_data_file *file;
> + struct perf_tool *tool;
> };
>
> #define PRINT_IP_OPT_IP (1<<0)
> --
> 1.8.3.1
>
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