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[73.78.62.130]) by smtp.googlemail.com with ESMTPSA id c5-20020a928e05000000b002f611806ae9sm1113457ild.60.2022.11.11.14.17.31 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 11 Nov 2022 14:17:31 -0800 (PST) From: Jim Cromie To: 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, linux-kernel@vger.kernel.org Cc: daniel.vetter@ffwll.ch, seanpaul@chromium.org, robdclark@gmail.com, linux@rasmusvillemoes.dk, joe@perches.com, Jim Cromie Subject: [PATCH 7/7] dyndbg: replace classmap list with a vector Date: Fri, 11 Nov 2022 15:17:15 -0700 Message-Id: <20221111221715.563020-8-jim.cromie@gmail.com> X-Mailer: git-send-email 2.38.1 In-Reply-To: <20221111221715.563020-1-jim.cromie@gmail.com> References: <20220912052852.1123868-1-jim.cromie@gmail.com> <20221111221715.563020-1-jim.cromie@gmail.com> MIME-Version: 1.0 X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,FREEMAIL_FROM, RCVD_IN_DNSWL_NONE,SPF_HELO_NONE,SPF_PASS autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1749239955900381148?= X-GMAIL-MSGID: =?utf-8?q?1749239955900381148?= 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_table gets: classes for the start-addy, num_classes for the length (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. Signed-off-by: Jim Cromie --- lib/dynamic_debug.c | 61 ++++++++++++++++++++++++--------------------- 1 file changed, 32 insertions(+), 29 deletions(-) diff --git a/lib/dynamic_debug.c b/lib/dynamic_debug.c index 48ca1387a409..fd5296dbb40f 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 { @@ -146,13 +147,15 @@ 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; @@ -163,7 +166,6 @@ 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 @@ -1109,9 +1111,10 @@ 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]; @@ -1195,30 +1198,31 @@ 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); + } } /* @@ -1252,10 +1256,9 @@ static int __ddebug_add_module(struct _ddebug_info *di, unsigned int base, 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); @@ -1344,8 +1347,8 @@ 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);