From: Jiri Olsa <jolsa@redhat.com>
To: Namhyung Kim <namhyung@kernel.org>
Cc: Jiri Olsa <jolsa@kernel.org>,
linux-kernel@vger.kernel.org,
Arnaldo Carvalho de Melo <acme@kernel.org>,
Corey Ashford <cjashfor@linux.vnet.ibm.com>,
David Ahern <dsahern@gmail.com>,
Frederic Weisbecker <fweisbec@gmail.com>,
Ingo Molnar <mingo@kernel.org>,
Jean Pihet <jean.pihet@linaro.org>,
Paul Mackerras <paulus@samba.org>,
Peter Zijlstra <a.p.zijlstra@chello.nl>
Subject: Re: [PATCH 05/17] perf tools: Add ordered_events_(get|put) interface
Date: Sun, 15 Jun 2014 19:27:03 +0200 [thread overview]
Message-ID: <20140615172703.GC1159@krava.brq.redhat.com> (raw)
In-Reply-To: <1402661105.2178.19.camel@leonhard>
On Fri, Jun 13, 2014 at 09:05:05PM +0900, Namhyung Kim wrote:
> 2014-06-13 (금), 00:08 +0200, Jiri Olsa:
> > +#define MAX_SAMPLE_BUFFER (64 * 1024 / sizeof(struct ordered_event))
> > +static struct ordered_event *alloc_event(struct ordered_events_queue *q)
> > +{
> > + struct list_head *cache = &q->cache;
> > + struct ordered_event *new;
> > +
> > + if (!list_empty(cache)) {
> > + new = list_entry(cache->next, struct ordered_event, list);
> > + list_del(&new->list);
> > + } else if (q->buffer) {
> > + new = q->buffer + q->buffer_idx;
> > + if (++q->buffer_idx == MAX_SAMPLE_BUFFER)
> > + q->buffer = NULL;
> > + } else {
> > + q->buffer = malloc(MAX_SAMPLE_BUFFER * sizeof(*new));
> > + if (!q->buffer)
> > + return NULL;
> > + list_add(&q->buffer->list, &q->to_free);
> > + q->buffer_idx = 2;
> > + new = q->buffer + 1;
>
> Hmm.. can we add a comment that the first entry is abused to maintain
> the to_free list?
ook
>
>
> > + }
> > +
> > + return new;
> > +}
> > +
> > +static struct ordered_event*
> > +ordered_events_get(struct ordered_events_queue *q, u64 timestamp)
> > +{
> > + struct ordered_event *new;
> > +
> > + new = alloc_event(q);
> > + if (new) {
> > + new->timestamp = timestamp;
> > + queue_event(q, new);
> > + }
> > +
> > + return new;
> > +}
> > +
> > +static void
> > +ordered_event_put(struct ordered_events_queue *q, struct ordered_event *iter)
> > +{
> > + list_del(&iter->list);
> > + list_add(&iter->list, &q->cache);
>
> list_move(&iter->list, &q->cache) ?
ok, I'll make that a separate patch, so it's obvious here
that I used the original code
>
> > + q->nr_events--;
> > +}
>
>
> [SNIP]
> > @@ -639,29 +681,13 @@ int perf_session_queue_event(struct perf_session *s, union perf_event *event,
> > return -EINVAL;
> > }
> >
> > - if (!list_empty(cache)) {
> > - new = list_entry(cache->next, struct ordered_event, list);
> > - list_del(&new->list);
> > - } else if (q->buffer) {
> > - new = q->buffer + q->buffer_idx;
> > - if (++q->buffer_idx == MAX_SAMPLE_BUFFER)
> > - q->buffer = NULL;
> > - } else {
> > - q->buffer = malloc(MAX_SAMPLE_BUFFER * sizeof(*new));
> > - if (!q->buffer)
> > - return -ENOMEM;
> > - list_add(&q->buffer->list, &q->to_free);
> > - q->buffer_idx = 2;
> > - new = q->buffer + 1;
> > + new = ordered_events_get(q, timestamp);
> > + if (new) {
> > + new->file_offset = file_offset;
> > + new->event = event;
> > }
>
> What about make it like below:
>
> if (!new)
> return -ENOMEM;
>
> This way we can share more of the original code.
ook, will do
thanks,
jirka
next prev parent reply other threads:[~2014-06-15 17:27 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-06-12 22:08 [PATCH 00/17] perf tools: Factor ordered samples queue Jiri Olsa
2014-06-12 22:08 ` [PATCH 01/17] perf tools: Always force PERF_RECORD_FINISHED_ROUND event Jiri Olsa
2014-06-13 11:51 ` Namhyung Kim
2014-06-15 17:17 ` Jiri Olsa
2014-06-12 22:08 ` [PATCH 02/17] perf tools: Fix accounting of ordered samples queue Jiri Olsa
2014-06-12 22:08 ` [PATCH 03/17] perf tools: Rename ordered_samples to ordered_events Jiri Olsa
2014-06-12 22:08 ` [PATCH 04/17] perf tools: Rename ordered_events_queue members Jiri Olsa
2014-06-12 22:08 ` [PATCH 05/17] perf tools: Add ordered_events_(get|put) interface Jiri Olsa
2014-06-13 12:05 ` Namhyung Kim
2014-06-15 17:27 ` Jiri Olsa [this message]
2014-06-12 22:08 ` [PATCH 06/17] perf tools: Factor ordered_events_flush to be more generic Jiri Olsa
2014-06-12 22:08 ` [PATCH 07/17] perf tools: Limit ordered events queue size Jiri Olsa
2014-06-12 22:08 ` [PATCH 08/17] perf tools: Flush ordered events in case of allocation failure Jiri Olsa
2014-06-12 22:08 ` [PATCH 09/17] perf tools: Make perf_session_deliver_event global Jiri Olsa
2014-06-12 22:08 ` [PATCH 10/17] perf tools: Create ordered-events object Jiri Olsa
2014-06-12 22:08 ` [PATCH 11/17] perf tools: Add ordered_events_queue_init function Jiri Olsa
2014-06-12 22:08 ` [PATCH 12/17] perf tools: Add ordered_events_queue_free function Jiri Olsa
2014-06-12 22:08 ` [PATCH 13/17] perf tools: Add perf_config_u64 function Jiri Olsa
2014-06-13 12:07 ` Namhyung Kim
2014-06-15 17:48 ` Jiri Olsa
2014-06-12 22:08 ` [PATCH 14/17] perf tools: Add report.queue-size config file option Jiri Olsa
2014-06-13 12:08 ` Namhyung Kim
2014-06-15 17:54 ` Jiri Olsa
2014-06-12 22:08 ` [PATCH 15/17] perf tools: Add debug prints for ordered events queue Jiri Olsa
2014-06-13 12:12 ` Namhyung Kim
2014-06-15 17:58 ` Jiri Olsa
2014-06-12 22:08 ` [PATCH 16/17] perf tools: Limit the ordered events queue by default to 100MB Jiri Olsa
2014-06-12 22:08 ` [PATCH 17/17] perf tools: Allow out of order messages in forced flush Jiri Olsa
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