From patchwork Wed Oct 18 17:05:44 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jim Cromie X-Patchwork-Id: 13427458 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 175D5CDB482 for ; Wed, 18 Oct 2023 17:06:30 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id DBD4610E411; Wed, 18 Oct 2023 17:06:19 +0000 (UTC) Received: from mail-io1-xd2c.google.com (mail-io1-xd2c.google.com [IPv6:2607:f8b0:4864:20::d2c]) by gabe.freedesktop.org (Postfix) with ESMTPS id 3D87010E402; Wed, 18 Oct 2023 17:06:15 +0000 (UTC) Received: by mail-io1-xd2c.google.com with SMTP id ca18e2360f4ac-7a66b5f7ea7so44319639f.2; Wed, 18 Oct 2023 10:06:15 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1697648774; x=1698253574; darn=lists.freedesktop.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=ozAe5gpJ31ZrBM/LVU4xoKo5OnQQtUx8zWJXyt9x1yU=; b=PNQcklzFBuvSAeJJzK6IvAtJvZje7b9Rv8QlTiSlyBb1CjikA4CswFZ9UymYt1ZZFx SaKw/nbo9Nrrc2IE5n3rtT1fq9938Dz903GuIpWNSX5D7J6eOJW8NYOPc4kWuIl2Ud3Z NtLtmLAVSHCBNTFdXnksBq1k7tsNxZmJB8sBm0yLge/kBawqrMKnK0jkVgVdlzHaI4Mf G5oSx1yDp00aFxo71c1W3hJLDp6MQL8Nig5H856VoWVl5x4pDzP76T2MqK5IdpV4kFZb K/AZZcjZqj2x87lzhc5a5GOQMQjO5RLKqRtEwEGFvmjy0Gp5/lQaCzHCs/qVbOO90iuW Dnkg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1697648774; x=1698253574; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=ozAe5gpJ31ZrBM/LVU4xoKo5OnQQtUx8zWJXyt9x1yU=; b=IcCjRDngj4+0ImLyldOaPW69LKUZqRKVKlPY5LL4x6mjCDZ6WUhb1s6q94EQiaNn5G rssaTT+nDUjhhvUmWuVrFQ4AbGdd8m8i3tHXimXHsacvpe6KDURpkBy13rOi4N9XPy2u VYIJkrJYUbNDLhH6rsX8Z6LTdM3cazQw6+CHNHLi7jpHI5XAo0t0OpoQm2Si+hoNWfnP 0PkSbKfVLDwUXR5mOJhm9SFcfDtnPjRcnArXaZ+ymCgSXiKWTTYg/OS7QLUsufVNfra+ RSFrS8aIBXjhEcxTiAyz1wR0tHLGxunK4CDEjyMAYZCn4tQv1mYgdfFBTel7yzt0qiU1 8QJg== X-Gm-Message-State: AOJu0Yyjm2sVKDDyvcPYiu1kuyfmuo23kMp7+Mngoishc6Qw1lWbCKW4 pUU+27Oey71YLgT11uz4E5A= X-Google-Smtp-Source: AGHT+IH3G+iubg3vLHpE7zJYGwfCScWtC5/ymAEINrZo3kyMhhFXed9+aE6N1q4H1T1bwHRAcpQWJg== X-Received: by 2002:a05:6602:2acb:b0:791:280:839e with SMTP id m11-20020a0566022acb00b007910280839emr6376663iov.16.1697648774389; Wed, 18 Oct 2023 10:06:14 -0700 (PDT) Received: from frodo.. (c-73-78-62-130.hsd1.co.comcast.net. [73.78.62.130]) by smtp.googlemail.com with ESMTPSA id n4-20020a5d8244000000b0079fa1a7cd36sm1228944ioo.30.2023.10.18.10.06.13 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 18 Oct 2023 10:06:13 -0700 (PDT) From: Jim Cromie To: linux-kernel@vger.kernel.org, jbaron@akamai.com, gregkh@linuxfoundation.org, dri-devel@lists.freedesktop.org, amd-gfx@lists.freedesktop.org, intel-gvt-dev@lists.freedesktop.org, intel-gfx@lists.freedesktop.org Subject: [PATCH v7c 04/24] dyndbg: replace classmap list with a vector Date: Wed, 18 Oct 2023 11:05:44 -0600 Message-ID: <20231018170604.569042-5-jim.cromie@gmail.com> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20231018170604.569042-1-jim.cromie@gmail.com> References: <20231018170604.569042-1-jim.cromie@gmail.com> MIME-Version: 1.0 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: lb@semihalf.com, groeck@google.com, linux-doc@vger.kernel.org, jani.nikula@intel.com, daniel.vetter@ffwll.ch, linux@rasmusvillemoes.dk, rostedt@goodmis.org, mcgrof@kernel.org, seanpaul@chromium.org, joe@perches.com, bleung@google.com, yanivt@google.com Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" Classmaps are stored/linked in a section/array, but are each added to the module's ddebug_table.maps list-head. This is unnecessary; even when ddebug_attach_classmap() is handling the builtin section (with classmaps for multiple builtin modules), its contents are ordered, so a module's possibly multiple classmaps will be consecutive in the section, and could be treated as a vector/block, since both start-addy and subrange length are in the ddebug_info arg. So this changes: struct ddebug_class_map drops list-head link. struct ddebug_table drops the list-head maps, and gets: classes & num_classes for the start-addy and num_classes, placed to improve struct packing. The loading: in ddebug_attach_module_classes(), replace the for-the-modname list-add loop, with a forloop that finds the module's subrange (start,length) of matching classmaps within the possibly builtin classmaps vector, and saves those to the ddebug_table. The reading/using: change list-foreach loops in ddebug_class_name() & ddebug_find_valid_class() to walk the array from start to length. Also: Move #define __outvar up, above an added use in a fn-prototype. Simplify ddebug_attach_module_classes args, ref has both addy,len. no functional changes Signed-off-by: Jim Cromie --- include/linux/dynamic_debug.h | 1 - lib/dynamic_debug.c | 61 ++++++++++++++++++----------------- 2 files changed, 32 insertions(+), 30 deletions(-) diff --git a/include/linux/dynamic_debug.h b/include/linux/dynamic_debug.h index 5231aaf361c4..b53217e4b711 100644 --- a/include/linux/dynamic_debug.h +++ b/include/linux/dynamic_debug.h @@ -83,7 +83,6 @@ enum class_map_type { }; struct ddebug_class_map { - struct list_head link; struct module *mod; const char *mod_name; /* needed for builtins */ const char **class_names; diff --git a/lib/dynamic_debug.c b/lib/dynamic_debug.c index b984ce338921..a3be2e7c8c84 100644 --- a/lib/dynamic_debug.c +++ b/lib/dynamic_debug.c @@ -45,10 +45,11 @@ extern struct ddebug_class_map __start___dyndbg_classes[]; extern struct ddebug_class_map __stop___dyndbg_classes[]; struct ddebug_table { - struct list_head link, maps; + struct list_head link; const char *mod_name; - unsigned int num_ddebugs; struct _ddebug *ddebugs; + struct ddebug_class_map *classes; + unsigned int num_ddebugs, num_classes; }; struct ddebug_query { @@ -147,13 +148,15 @@ static void vpr_info_dq(const struct ddebug_query *query, const char *msg) query->first_lineno, query->last_lineno, query->class_string); } +#define __outvar /* filled by callee */ static struct ddebug_class_map *ddebug_find_valid_class(struct ddebug_table const *dt, - const char *class_string, int *class_id) + const char *class_string, + __outvar int *class_id) { struct ddebug_class_map *map; - int idx; + int i, idx; - list_for_each_entry(map, &dt->maps, link) { + for (map = dt->classes, i = 0; i < dt->num_classes; i++, map++) { idx = match_string(map->class_names, map->length, class_string); if (idx >= 0) { *class_id = idx + map->base; @@ -164,7 +167,6 @@ static struct ddebug_class_map *ddebug_find_valid_class(struct ddebug_table cons return NULL; } -#define __outvar /* filled by callee */ /* * Search the tables for _ddebug's which match the given `query' and * apply the `flags' and `mask' to them. Returns number of matching @@ -1111,9 +1113,10 @@ static void *ddebug_proc_next(struct seq_file *m, void *p, loff_t *pos) static const char *ddebug_class_name(struct ddebug_iter *iter, struct _ddebug *dp) { - struct ddebug_class_map *map; + struct ddebug_class_map *map = iter->table->classes; + int i, nc = iter->table->num_classes; - list_for_each_entry(map, &iter->table->maps, link) + for (i = 0; i < nc; i++, map++) if (class_in_range(dp->class_id, map)) return map->class_names[dp->class_id - map->base]; @@ -1197,30 +1200,31 @@ static const struct proc_ops proc_fops = { .proc_write = ddebug_proc_write }; -static void ddebug_attach_module_classes(struct ddebug_table *dt, - struct ddebug_class_map *classes, - int num_classes) +static void ddebug_attach_module_classes(struct ddebug_table *dt, struct _ddebug_info *di) { struct ddebug_class_map *cm; - int i, j, ct = 0; + int i, nc = 0; - for (cm = classes, i = 0; i < num_classes; i++, cm++) { + /* + * Find this module's classmaps in a subrange/wholerange of + * the builtin/modular classmap vector/section. Save the start + * and length of the subrange at its edges. + */ + for (cm = di->classes, i = 0; i < di->num_classes; i++, cm++) { if (!strcmp(cm->mod_name, dt->mod_name)) { - - v2pr_info("class[%d]: module:%s base:%d len:%d ty:%d\n", i, - cm->mod_name, cm->base, cm->length, cm->map_type); - - for (j = 0; j < cm->length; j++) - v3pr_info(" %d: %d %s\n", j + cm->base, j, - cm->class_names[j]); - - list_add(&cm->link, &dt->maps); - ct++; + if (!nc) { + v2pr_info("start subrange, class[%d]: module:%s base:%d len:%d ty:%d\n", + i, cm->mod_name, cm->base, cm->length, cm->map_type); + dt->classes = cm; + } + nc++; } } - if (ct) - vpr_info("module:%s attached %d classes\n", dt->mod_name, ct); + if (nc) { + dt->num_classes = nc; + vpr_info("module:%s attached %d classes\n", dt->mod_name, nc); + } } /* @@ -1253,10 +1257,9 @@ static int ddebug_add_module(struct _ddebug_info *di, const char *modname) dt->num_ddebugs = di->num_descs; INIT_LIST_HEAD(&dt->link); - INIT_LIST_HEAD(&dt->maps); if (di->classes && di->num_classes) - ddebug_attach_module_classes(dt, di->classes, di->num_classes); + ddebug_attach_module_classes(dt, di); mutex_lock(&ddebug_lock); list_add_tail(&dt->link, &ddebug_tables); @@ -1369,8 +1372,8 @@ static void ddebug_remove_all_tables(void) mutex_lock(&ddebug_lock); while (!list_empty(&ddebug_tables)) { struct ddebug_table *dt = list_entry(ddebug_tables.next, - struct ddebug_table, - link); + struct ddebug_table, + link); ddebug_table_free(dt); } mutex_unlock(&ddebug_lock);