From patchwork Tue Jul 21 15:41:47 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Markus Armbruster X-Patchwork-Id: 277654 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=-9.8 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY, SPF_HELO_NONE, SPF_PASS autolearn=unavailable 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 A26D2C433E5 for ; Tue, 21 Jul 2020 15:45:17 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 2D5C32064B for ; Tue, 21 Jul 2020 15:45:17 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="JKq3Ugrr" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 2D5C32064B Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:58766 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1jxuSC-0002uP-2d for qemu-devel@archiver.kernel.org; Tue, 21 Jul 2020 11:45:16 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:56634) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1jxuOz-0006uS-8B for qemu-devel@nongnu.org; Tue, 21 Jul 2020 11:41:57 -0400 Received: from us-smtp-delivery-1.mimecast.com ([207.211.31.120]:42404 helo=us-smtp-1.mimecast.com) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_CBC_SHA1:256) (Exim 4.90_1) (envelope-from ) id 1jxuOv-0000Kt-A0 for qemu-devel@nongnu.org; Tue, 21 Jul 2020 11:41:56 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1595346112; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=AP+cHZ9p9v1kaib6ijpzj845c5fWdLTq624R6eiDzv0=; b=JKq3UgrrGsaF/zilDuB7/+5AUYHysqvNgqvMD5j9NH6wZP5n/wjQ81PSGHT15bkVQ7Vo1k HmtbknZyYDIcAFIX5uj6U9owEYDqb4XGVCWbsWeAwuDT0bk5AmCDwDw6iod56axd8E4RGN 4g1kZ8qrAsetC/hpuzDF3qmot2LJk0c= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-343-2JzC0WMHP2mYKuXflB8RTQ-1; Tue, 21 Jul 2020 11:41:50 -0400 X-MC-Unique: 2JzC0WMHP2mYKuXflB8RTQ-1 Received: from smtp.corp.redhat.com (int-mx05.intmail.prod.int.phx2.redhat.com [10.5.11.15]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id E130658; Tue, 21 Jul 2020 15:41:48 +0000 (UTC) Received: from blackfin.pond.sub.org (ovpn-112-143.ams2.redhat.com [10.36.112.143]) by smtp.corp.redhat.com (Postfix) with ESMTPS id B01F172680; Tue, 21 Jul 2020 15:41:48 +0000 (UTC) Received: by blackfin.pond.sub.org (Postfix, from userid 1000) id 6B986107F756; Tue, 21 Jul 2020 17:41:47 +0200 (CEST) From: Markus Armbruster To: qemu-devel@nongnu.org Subject: [PULL 3/3] qom: Make info qom-tree sort children more efficiently Date: Tue, 21 Jul 2020 17:41:47 +0200 Message-Id: <20200721154147.1657100-4-armbru@redhat.com> In-Reply-To: <20200721154147.1657100-1-armbru@redhat.com> References: <20200721154147.1657100-1-armbru@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.15 X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Received-SPF: pass client-ip=207.211.31.120; envelope-from=armbru@redhat.com; helo=us-smtp-1.mimecast.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/07/21 10:20:34 X-ACL-Warn: Detected OS = Linux 2.2.x-3.x [generic] [fuzzy] X-Spam_score_int: -30 X-Spam_score: -3.1 X-Spam_bar: --- X-Spam_report: (-3.1 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-1, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H4=-0.01, RCVD_IN_MSPIKE_WL=-0.01, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: peter.maydell@linaro.org, berrange@redhat.com, ehabkost@redhat.com, "Dr . David Alan Gilbert" , pbonzini@redhat.com Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" Commit e8c9e65816 "qom: Make "info qom-tree" show children sorted" sorts children the simple, stupid, quadratic way. I thought the number of children would be small enough for this not to matter. I was wrong: there are outliers with several hundred children, e.g ARM machines nuri and smdkc210 each have a node with 513 children. While n^2 sorting isn't noticeable in normal, human usage even for n=513, it can be quite noticeable in certain automated tests. In particular, the sort made device-introspect-test even slower. Commit 3e7b80f84d "tests: improve performance of device-introspect-test" just fixed that by cutting back its excessive use of "info qom-tree". Sorting more efficiently makes sense regardless, so do it. Signed-off-by: Markus Armbruster Message-Id: <20200714160202.3121879-6-armbru@redhat.com> Reviewed-by: Dr. David Alan Gilbert --- qom/qom-hmp-cmds.c | 25 +++++++++++++------------ 1 file changed, 13 insertions(+), 12 deletions(-) diff --git a/qom/qom-hmp-cmds.c b/qom/qom-hmp-cmds.c index 4032c96089..8861a109d5 100644 --- a/qom/qom-hmp-cmds.c +++ b/qom/qom-hmp-cmds.c @@ -94,25 +94,23 @@ typedef struct QOMCompositionState { static void print_qom_composition(Monitor *mon, Object *obj, int indent); -static int qom_composition_compare(const void *a, const void *b, void *ignore) +static int qom_composition_compare(const void *a, const void *b) { - return g_strcmp0(object_get_canonical_path_component(a), - object_get_canonical_path_component(b)); + return g_strcmp0(object_get_canonical_path_component(*(Object **)a), + object_get_canonical_path_component(*(Object **)b)); } static int insert_qom_composition_child(Object *obj, void *opaque) { - GQueue *children = opaque; - - g_queue_insert_sorted(children, obj, qom_composition_compare, NULL); + g_array_append_val(opaque, obj); return 0; } static void print_qom_composition(Monitor *mon, Object *obj, int indent) { + GArray *children = g_array_new(false, false, sizeof(Object *)); const char *name; - GQueue children; - Object *child; + int i; if (obj == object_get_root()) { name = ""; @@ -122,11 +120,14 @@ static void print_qom_composition(Monitor *mon, Object *obj, int indent) monitor_printf(mon, "%*s/%s (%s)\n", indent, "", name, object_get_typename(obj)); - g_queue_init(&children); - object_child_foreach(obj, insert_qom_composition_child, &children); - while ((child = g_queue_pop_head(&children))) { - print_qom_composition(mon, child, indent + 2); + object_child_foreach(obj, insert_qom_composition_child, children); + g_array_sort(children, qom_composition_compare); + + for (i = 0; i < children->len; i++) { + print_qom_composition(mon, g_array_index(children, Object *, i), + indent + 2); } + g_array_free(children, TRUE); } void hmp_info_qom_tree(Monitor *mon, const QDict *dict)