From patchwork Fri Jul 15 20:50:45 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Arnaldo Carvalho de Melo X-Patchwork-Id: 72140 Delivered-To: patch@linaro.org Received: by 10.140.29.52 with SMTP id a49csp820483qga; Fri, 15 Jul 2016 13:53:13 -0700 (PDT) X-Received: by 10.66.139.230 with SMTP id rb6mr35500901pab.101.1468615987015; Fri, 15 Jul 2016 13:53:07 -0700 (PDT) Return-Path: Received: from vger.kernel.org (vger.kernel.org. [209.132.180.67]) by mx.google.com with ESMTP id z76si5819435pfj.173.2016.07.15.13.53.06; Fri, 15 Jul 2016 13:53:07 -0700 (PDT) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752442AbcGOUwY (ORCPT + 29 others); Fri, 15 Jul 2016 16:52:24 -0400 Received: from bombadil.infradead.org ([198.137.202.9]:44258 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751717AbcGOUvV (ORCPT ); Fri, 15 Jul 2016 16:51:21 -0400 Received: from [179.235.155.208] (helo=jouet.infradead.org) by bombadil.infradead.org with esmtpsa (Exim 4.85_2 #1 (Red Hat Linux)) id 1bOA4r-0008Us-Gp; Fri, 15 Jul 2016 20:51:17 +0000 Received: by jouet.infradead.org (Postfix, from userid 1000) id D22B2143C79; Fri, 15 Jul 2016 17:51:11 -0300 (BRT) From: Arnaldo Carvalho de Melo To: Ingo Molnar Cc: linux-kernel@vger.kernel.org, Wang Nan , He Kuang , Masami Hiramatsu , Namhyung Kim , Nilay Vaish , Zefan Li , pi3orama@163.com, Arnaldo Carvalho de Melo Subject: [PATCH 11/24] perf record: Decouple record__mmap_read() and evlist. Date: Fri, 15 Jul 2016 17:50:45 -0300 Message-Id: <1468615858-24936-12-git-send-email-acme@kernel.org> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1468615858-24936-1-git-send-email-acme@kernel.org> References: <1468615858-24936-1-git-send-email-acme@kernel.org> X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org. See http://www.infradead.org/rpr.html Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Wang Nan Perf evlist will have multiple mmap arrays. Update record__mmap_read(): it should read from 'struct perf_mmap' directly. Also, make record__mmap_read() ready to read from backward ring buffer. Signed-off-by: Wang Nan Acked-by: Jiri Olsa Cc: He Kuang Cc: Masami Hiramatsu Cc: Namhyung Kim Cc: Nilay Vaish Cc: Zefan Li Cc: pi3orama@163.com Link: http://lkml.kernel.org/r/1468485287-33422-5-git-send-email-wangnan0@huawei.com Signed-off-by: Arnaldo Carvalho de Melo --- tools/perf/builtin-record.c | 37 ++++++++++++++++++++++--------------- 1 file changed, 22 insertions(+), 15 deletions(-) -- 2.7.4 diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c index d9f5cc3a3667..d15517e849a3 100644 --- a/tools/perf/builtin-record.c +++ b/tools/perf/builtin-record.c @@ -119,11 +119,10 @@ backward_rb_find_range(void *buf, int mask, u64 head, u64 *start, u64 *end) } static int -rb_find_range(struct perf_evlist *evlist, - void *data, int mask, u64 head, u64 old, - u64 *start, u64 *end) +rb_find_range(void *data, int mask, u64 head, u64 old, + u64 *start, u64 *end, bool backward) { - if (!evlist->backward) { + if (!backward) { *start = old; *end = head; return 0; @@ -132,9 +131,10 @@ rb_find_range(struct perf_evlist *evlist, return backward_rb_find_range(data, mask, head, start, end); } -static int record__mmap_read(struct record *rec, struct perf_evlist *evlist, int idx) +static int +record__mmap_read(struct record *rec, struct perf_mmap *md, + bool overwrite, bool backward) { - struct perf_mmap *md = &evlist->mmap[idx]; u64 head = perf_mmap__read_head(md); u64 old = md->prev; u64 end = head, start = old; @@ -143,8 +143,8 @@ static int record__mmap_read(struct record *rec, struct perf_evlist *evlist, int void *buf; int rc = 0; - if (rb_find_range(evlist, data, md->mask, head, - old, &start, &end)) + if (rb_find_range(data, md->mask, head, + old, &start, &end, backward)) return -1; if (start == end) @@ -157,7 +157,7 @@ static int record__mmap_read(struct record *rec, struct perf_evlist *evlist, int WARN_ONCE(1, "failed to keep up with mmap data. (warn only once)\n"); md->prev = head; - perf_evlist__mmap_consume(evlist, idx); + perf_mmap__consume(md, overwrite || backward); return 0; } @@ -182,7 +182,7 @@ static int record__mmap_read(struct record *rec, struct perf_evlist *evlist, int } md->prev = head; - perf_evlist__mmap_consume(evlist, idx); + perf_mmap__consume(md, overwrite || backward); out: return rc; } @@ -498,20 +498,27 @@ static struct perf_event_header finished_round_event = { .type = PERF_RECORD_FINISHED_ROUND, }; -static int record__mmap_read_evlist(struct record *rec, struct perf_evlist *evlist) +static int record__mmap_read_evlist(struct record *rec, struct perf_evlist *evlist, + bool backward) { u64 bytes_written = rec->bytes_written; int i; int rc = 0; + struct perf_mmap *maps; if (!evlist) return 0; + maps = evlist->mmap; + if (!maps) + return 0; + for (i = 0; i < evlist->nr_mmaps; i++) { - struct auxtrace_mmap *mm = &evlist->mmap[i].auxtrace_mmap; + struct auxtrace_mmap *mm = &maps[i].auxtrace_mmap; - if (evlist->mmap[i].base) { - if (record__mmap_read(rec, evlist, i) != 0) { + if (maps[i].base) { + if (record__mmap_read(rec, &maps[i], + evlist->overwrite, backward) != 0) { rc = -1; goto out; } @@ -539,7 +546,7 @@ static int record__mmap_read_all(struct record *rec) { int err; - err = record__mmap_read_evlist(rec, rec->evlist); + err = record__mmap_read_evlist(rec, rec->evlist, false); if (err) return err;