From patchwork Tue Feb 6 17:44:57 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: John Garry X-Patchwork-Id: 10203497 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 7A58760247 for ; Tue, 6 Feb 2018 16:57:12 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 518AE28173 for ; Tue, 6 Feb 2018 16:57:12 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 455D9289B3; Tue, 6 Feb 2018 16:57:12 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-4.2 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,RCVD_IN_DNSWL_MED autolearn=ham version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [65.50.211.133]) (using TLSv1.2 with cipher AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id AD7E828173 for ; Tue, 6 Feb 2018 16:57:11 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-ID:Date:Subject:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=CVfegr9qJ7tQD+5Uyp9V3dnfuMU9g7Hy5IwDmeY9zgw=; b=LMszqsv80ai/44 Qlre5sxv+BxJ9ohNv+vsUp35T0TZyz6xfHtbJURSAIIFmiC20z9MPlkiXRteXNRrcgW7R+LOuuaE0 kHyJs4rZ0fk9y/EXQcjeQOBCghi2PEgKg6iqjgP64QzQAA4nea5p3xehNFn7yVQhCq/RyAlnR0iiR 9B/9Yv+6fiI4poo++HuDKOWvTkTYNOg3OjZ9y1ETfA9yYdqPaj9KhYfY/zumGxtVjmenxCTMRTrV9 AFigA0pbG03bJuKMgKACq6N1OQOpUigo008wKjF6eXRlRcoJBu+WZg+SLE+kmvifZbiBxw1QOmaY0 jLQEiYDA37iRpQyhmI3g==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.89 #1 (Red Hat Linux)) id 1ej6YP-0006zB-Vr; Tue, 06 Feb 2018 16:57:09 +0000 Received: from [45.249.212.35] (helo=huawei.com) by bombadil.infradead.org with esmtps (Exim 4.89 #1 (Red Hat Linux)) id 1ej6Xc-00067J-Rg for linux-arm-kernel@lists.infradead.org; Tue, 06 Feb 2018 16:56:23 +0000 Received: from DGGEMS413-HUB.china.huawei.com (unknown [172.30.72.59]) by Forcepoint Email with ESMTP id 4E74111ECF883; Wed, 7 Feb 2018 00:55:58 +0800 (CST) Received: from localhost.localdomain (10.67.212.75) by DGGEMS413-HUB.china.huawei.com (10.3.19.213) with Microsoft SMTP Server id 14.3.361.1; Wed, 7 Feb 2018 00:55:51 +0800 From: John Garry To: , , , , , , , , , Subject: [PATCH 2/9] perf utils: add support for pmu events vendor sub-directory Date: Wed, 7 Feb 2018 01:44:57 +0800 Message-ID: <1517939104-230881-3-git-send-email-john.garry@huawei.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1517939104-230881-1-git-send-email-john.garry@huawei.com> References: <1517939104-230881-1-git-send-email-john.garry@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.67.212.75] X-CFilter-Loop: Reflected X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: zhangshaokun@hisilicon.com, John Garry , linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linuxarm@huawei.com Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP For some architectures (like arm), it is required to support a vendor sub-directory and not locate all the JSONs for a specific vendor in the same folder. This is because all the events for the same vendor will be placed in the same pmu events table, which may cause conflict. This conflict would be in the instance that a vendor's custom implemented events do have the same meaning on different platforms, so events in the pmu table would conflict. In addition, per list command may show events which are not even supported for a given platform. This patch adds support for a arch/vendor/platform directory hierarchy, while maintaining backwards-compatibility for existing arch/platform structure. In this, each platform would always have its own pmu events table. In generated file pmu_events.c, each platform table name is in the format pme{_vendor}_platform, like this: struct pmu_events_map pmu_events_map[] = { { .cpuid = "0x00000000420f5160", .version = "v1", .type = "core", .table = pme_cavium_thunderx2 }, { .cpuid = 0, .version = 0, .type = 0, .table = 0, }, }; Signed-off-by: John Garry Acked-by: Jiri Olsa --- tools/perf/pmu-events/README | 4 +++ tools/perf/pmu-events/jevents.c | 70 ++++++++++++++++++++++++++++++++++++++--- 2 files changed, 70 insertions(+), 4 deletions(-) diff --git a/tools/perf/pmu-events/README b/tools/perf/pmu-events/README index 2407abc..655286f 100644 --- a/tools/perf/pmu-events/README +++ b/tools/perf/pmu-events/README @@ -28,6 +28,10 @@ sub directory. Thus for the Silvermont X86 CPU: Cache.json Memory.json Virtual-Memory.json Frontend.json Pipeline.json +The JSONs folder for a CPU model/family may be placed in the root arch +folder, or may be placed in a vendor sub-folder under the arch folder +for instances where the arch and vendor are not the same. + Using the JSON files and the mapfile, 'jevents' generates the C source file, 'pmu-events.c', which encodes the two sets of tables: diff --git a/tools/perf/pmu-events/jevents.c b/tools/perf/pmu-events/jevents.c index 9e0a21e..eb183b1 100644 --- a/tools/perf/pmu-events/jevents.c +++ b/tools/perf/pmu-events/jevents.c @@ -588,7 +588,7 @@ static char *file_name_to_table_name(char *fname) * Derive rest of table name from basename of the JSON file, * replacing hyphens and stripping out .json suffix. */ - n = asprintf(&tblname, "pme_%s", basename(fname)); + n = asprintf(&tblname, "pme_%s", fname); if (n < 0) { pr_info("%s: asprintf() error %s for file %s\n", prog, strerror(errno), fname); @@ -598,7 +598,7 @@ static char *file_name_to_table_name(char *fname) for (i = 0; i < strlen(tblname); i++) { c = tblname[i]; - if (c == '-') + if (c == '-' || c == '/') tblname[i] = '_'; else if (c == '.') { tblname[i] = '\0'; @@ -755,15 +755,65 @@ static int get_maxfds(void) static FILE *eventsfp; static char *mapfile; +static int is_leaf_dir(const char *fpath) +{ + DIR *d; + struct dirent *dir; + int res = 1; + + d = opendir(fpath); + if (!d) + return 0; + + while ((dir = readdir(d)) != NULL) { + if (dir->d_type == DT_DIR && dir->d_name[0] != '.') { + res = 0; + break; + } else if (dir->d_type == DT_UNKNOWN) { + char path[PATH_MAX]; + struct stat st; + + sprintf(path, "%s/%s", fpath, dir->d_name); + if (stat(path, &st)) + break; + + if (S_ISDIR(st.st_mode)) { + res = 0; + break; + } + } + } + + closedir(d); + + return res; +} + static int process_one_file(const char *fpath, const struct stat *sb, int typeflag, struct FTW *ftwbuf) { - char *tblname, *bname = (char *) fpath + ftwbuf->base; + char *tblname, *bname; int is_dir = typeflag == FTW_D; int is_file = typeflag == FTW_F; int level = ftwbuf->level; int err = 0; + if (level == 2 && is_dir) { + /* + * For level 2 directory, bname will include parent name, + * like vendor/platform. So search back from platform dir + * to find this. + */ + bname = (char *) fpath + ftwbuf->base - 2; + for (;;) { + if (*bname == '/') + break; + bname--; + } + bname++; + } else + bname = (char *) fpath + ftwbuf->base; + pr_debug("%s %d %7jd %-20s %s\n", is_file ? "f" : is_dir ? "d" : "x", level, sb->st_size, bname, fpath); @@ -773,7 +823,7 @@ static int process_one_file(const char *fpath, const struct stat *sb, return 0; /* model directory, reset topic */ - if (level == 1 && is_dir) { + if (level == 1 && is_dir && is_leaf_dir(fpath)) { if (close_table) print_events_table_suffix(eventsfp); @@ -791,6 +841,18 @@ static int process_one_file(const char *fpath, const struct stat *sb, print_events_table_prefix(eventsfp, tblname); return 0; + } else if (level == 2 && is_dir) { + if (close_table) + print_events_table_suffix(eventsfp); + + tblname = file_name_to_table_name(bname); + if (!tblname) { + pr_info("%s: Error determining table name for %s, exiting\n", + prog, bname); + return -1; + } + + print_events_table_prefix(eventsfp, tblname); } /*