From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-10.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 25164ECE58D for ; Fri, 11 Oct 2019 20:12:09 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id DEA24206CD for ; Fri, 11 Oct 2019 20:12:08 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1570824729; bh=agsyZn+ES1JZTA8JfcuFgPSKqI240swWPRPUbd18kHc=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=xNdrzcxN060mnMNqmTjuYpE7lOS9D8wJox11MAn8JvZCGIArv8sn6b7BlA10/LKH5 5koXamDcXnZBiQp1U1EJILiod10cbAXxNgCAQLIHitmGuVIHe65nZGSzXIXt6fzMXS 6UVD25jyYTngZqcLPVlr0QC80E+CpEqJz2HsdAFE= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729922AbfJKUMH (ORCPT ); Fri, 11 Oct 2019 16:12:07 -0400 Received: from mail.kernel.org ([198.145.29.99]:47672 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729421AbfJKULd (ORCPT ); Fri, 11 Oct 2019 16:11:33 -0400 Received: from quaco.ghostprotocols.net (189-94-137-67.3g.claro.net.br [189.94.137.67]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 4321E2246B; Fri, 11 Oct 2019 20:11:28 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1570824691; bh=agsyZn+ES1JZTA8JfcuFgPSKqI240swWPRPUbd18kHc=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=luGdbaWwFF2aKWPLZShCf/ovEdizLNAengL7KMbgcdkUrhf1QTGQpRlrr8bB0+iq6 dUQzbzTB2x0eK5GGs/YzKNB3T+0qzTijz4mTCfupQu1Lx0dXH8bp8k7uVy6lPuPmn0 eW2gUh4FcZa/T+0ntmEUYrFGm6PjBB7ETu99ssvI= From: Arnaldo Carvalho de Melo To: Ingo Molnar , Thomas Gleixner Cc: Jiri Olsa , Namhyung Kim , Clark Williams , linux-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org, Alexander Shishkin , Michael Petlan , Peter Zijlstra , Arnaldo Carvalho de Melo Subject: [PATCH 62/69] perf evlist: Switch to libperf's mmap interface Date: Fri, 11 Oct 2019 17:05:52 -0300 Message-Id: <20191011200559.7156-63-acme@kernel.org> X-Mailer: git-send-email 2.21.0 In-Reply-To: <20191011200559.7156-1-acme@kernel.org> References: <20191011200559.7156-1-acme@kernel.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Jiri Olsa Switch to the libperf mmap interface by calling directly perf_evlist__mmap_ops() and removing perf's evlist__mmap_per_* functions. By switching to libperf perf_evlist__mmap() we need to operate over 'struct perf_mmap' in evlist__add_pollfd, so make the related changes there. Signed-off-by: Jiri Olsa Cc: Alexander Shishkin Cc: Michael Petlan Cc: Namhyung Kim Cc: Peter Zijlstra Link: http://lore.kernel.org/lkml/20191007125344.14268-22-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo --- tools/perf/util/evlist.c | 179 +-------------------------------------- 1 file changed, 4 insertions(+), 175 deletions(-) diff --git a/tools/perf/util/evlist.c b/tools/perf/util/evlist.c index d57b684b4b7b..3f4f11f27b94 100644 --- a/tools/perf/util/evlist.c +++ b/tools/perf/util/evlist.c @@ -431,10 +431,10 @@ int evlist__add_pollfd(struct evlist *evlist, int fd) static void perf_evlist__munmap_filtered(struct fdarray *fda, int fd, void *arg __maybe_unused) { - struct mmap *map = fda->priv[fd].ptr; + struct perf_mmap *map = fda->priv[fd].ptr; if (map) - perf_mmap__put(&map->core); + perf_mmap__put(map); } int evlist__filter_pollfd(struct evlist *evlist, short revents_and_mask) @@ -448,22 +448,6 @@ int evlist__poll(struct evlist *evlist, int timeout) return perf_evlist__poll(&evlist->core, timeout); } -static void perf_evlist__set_sid_idx(struct evlist *evlist, - struct evsel *evsel, int idx, int cpu, - int thread) -{ - struct perf_sample_id *sid = SID(evsel, cpu, thread); - sid->idx = idx; - if (evlist->core.cpus && cpu >= 0) - sid->cpu = evlist->core.cpus->map[cpu]; - else - sid->cpu = -1; - if (!evsel->core.system_wide && evlist->core.threads && thread >= 0) - sid->tid = perf_thread_map__pid(evlist->core.threads, thread); - else - sid->tid = -1; -} - struct perf_sample_id *perf_evlist__id2sid(struct evlist *evlist, u64 id) { struct hlist_head *head; @@ -652,93 +636,6 @@ static struct mmap *evlist__alloc_mmap(struct evlist *evlist, return map; } -static bool -perf_evlist__should_poll(struct evlist *evlist __maybe_unused, - struct evsel *evsel) -{ - if (evsel->core.attr.write_backward) - return false; - return true; -} - -static int evlist__mmap_per_evsel(struct evlist *evlist, int idx, - struct mmap_params *mp, int cpu_idx, - int thread, int *_output, int *_output_overwrite) -{ - struct evsel *evsel; - int revent; - int evlist_cpu = cpu_map__cpu(evlist->core.cpus, cpu_idx); - - evlist__for_each_entry(evlist, evsel) { - struct mmap *maps = evlist->mmap; - int *output = _output; - int fd; - int cpu; - - mp->core.prot = PROT_READ | PROT_WRITE; - if (evsel->core.attr.write_backward) { - output = _output_overwrite; - maps = evlist->overwrite_mmap; - - if (!maps) { - maps = evlist__alloc_mmap(evlist, true); - if (!maps) - return -1; - evlist->overwrite_mmap = maps; - if (evlist->bkw_mmap_state == BKW_MMAP_NOTREADY) - perf_evlist__toggle_bkw_mmap(evlist, BKW_MMAP_RUNNING); - } - mp->core.prot &= ~PROT_WRITE; - } - - if (evsel->core.system_wide && thread) - continue; - - cpu = perf_cpu_map__idx(evsel->core.cpus, evlist_cpu); - if (cpu == -1) - continue; - - fd = FD(evsel, cpu, thread); - - if (*output == -1) { - *output = fd; - - if (mmap__mmap(&maps[idx], mp, *output, evlist_cpu) < 0) - return -1; - } else { - if (ioctl(fd, PERF_EVENT_IOC_SET_OUTPUT, *output) != 0) - return -1; - - perf_mmap__get(&maps[idx].core); - } - - revent = perf_evlist__should_poll(evlist, evsel) ? POLLIN : 0; - - /* - * The system_wide flag causes a selected event to be opened - * always without a pid. Consequently it will never get a - * POLLHUP, but it is used for tracking in combination with - * other events, so it should not need to be polled anyway. - * Therefore don't add it for polling. - */ - if (!evsel->core.system_wide && - perf_evlist__add_pollfd(&evlist->core, fd, &maps[idx], revent) < 0) { - perf_mmap__put(&maps[idx].core); - return -1; - } - - if (evsel->core.attr.read_format & PERF_FORMAT_ID) { - if (perf_evlist__id_add_fd(&evlist->core, &evsel->core, cpu, thread, - fd) < 0) - return -1; - perf_evlist__set_sid_idx(evlist, evsel, idx, cpu, - thread); - } - } - - return 0; -} - static void perf_evlist__mmap_cb_idx(struct perf_evlist *_evlist, struct perf_mmap_param *_mp, @@ -783,61 +680,6 @@ perf_evlist__mmap_cb_mmap(struct perf_mmap *_map, struct perf_mmap_param *_mp, return mmap__mmap(map, mp, output, cpu); } -static int evlist__mmap_per_cpu(struct evlist *evlist, - struct mmap_params *mp) -{ - int cpu, thread; - int nr_cpus = perf_cpu_map__nr(evlist->core.cpus); - int nr_threads = perf_thread_map__nr(evlist->core.threads); - - pr_debug2("perf event ring buffer mmapped per cpu\n"); - for (cpu = 0; cpu < nr_cpus; cpu++) { - int output = -1; - int output_overwrite = -1; - - auxtrace_mmap_params__set_idx(&mp->auxtrace_mp, evlist, cpu, - true); - - for (thread = 0; thread < nr_threads; thread++) { - if (evlist__mmap_per_evsel(evlist, cpu, mp, cpu, - thread, &output, &output_overwrite)) - goto out_unmap; - } - } - - return 0; - -out_unmap: - evlist__munmap_nofree(evlist); - return -1; -} - -static int evlist__mmap_per_thread(struct evlist *evlist, - struct mmap_params *mp) -{ - int thread; - int nr_threads = perf_thread_map__nr(evlist->core.threads); - - pr_debug2("perf event ring buffer mmapped per thread\n"); - for (thread = 0; thread < nr_threads; thread++) { - int output = -1; - int output_overwrite = -1; - - auxtrace_mmap_params__set_idx(&mp->auxtrace_mp, evlist, thread, - false); - - if (evlist__mmap_per_evsel(evlist, thread, mp, 0, thread, - &output, &output_overwrite)) - goto out_unmap; - } - - return 0; - -out_unmap: - evlist__munmap_nofree(evlist); - return -1; -} - unsigned long perf_event_mlock_kb_in_pages(void) { unsigned long pages; @@ -965,9 +807,6 @@ int evlist__mmap_ex(struct evlist *evlist, unsigned int pages, bool auxtrace_overwrite, int nr_cblocks, int affinity, int flush, int comp_level) { - struct evsel *evsel; - const struct perf_cpu_map *cpus = evlist->core.cpus; - const struct perf_thread_map *threads = evlist->core.threads; /* * Delay setting mp.prot: set it before calling perf_mmap__mmap. * Its value is decided by evsel's write_backward. @@ -979,7 +818,7 @@ int evlist__mmap_ex(struct evlist *evlist, unsigned int pages, .flush = flush, .comp_level = comp_level }; - struct perf_evlist_mmap_ops ops __maybe_unused = { + struct perf_evlist_mmap_ops ops = { .idx = perf_evlist__mmap_cb_idx, .get = perf_evlist__mmap_cb_get, .mmap = perf_evlist__mmap_cb_mmap, @@ -1000,17 +839,7 @@ int evlist__mmap_ex(struct evlist *evlist, unsigned int pages, auxtrace_mmap_params__init(&mp.auxtrace_mp, evlist->core.mmap_len, auxtrace_pages, auxtrace_overwrite); - evlist__for_each_entry(evlist, evsel) { - if ((evsel->core.attr.read_format & PERF_FORMAT_ID) && - evsel->core.sample_id == NULL && - perf_evsel__alloc_id(&evsel->core, perf_cpu_map__nr(cpus), threads->nr) < 0) - return -ENOMEM; - } - - if (perf_cpu_map__empty(cpus)) - return evlist__mmap_per_thread(evlist, &mp); - - return evlist__mmap_per_cpu(evlist, &mp); + return perf_evlist__mmap_ops(&evlist->core, &ops, &mp.core); } int evlist__mmap(struct evlist *evlist, unsigned int pages) -- 2.21.0