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 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 smtp.lore.kernel.org (Postfix) with ESMTPS id B84B6C47DD9 for ; Mon, 22 Jan 2024 15:34:15 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1rRwJD-0003Iv-Lv; Mon, 22 Jan 2024 10:33:59 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1rRwJB-0003HU-NA for qemu-devel@nongnu.org; Mon, 22 Jan 2024 10:33:57 -0500 Received: from us-smtp-delivery-124.mimecast.com ([170.10.133.124]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1rRwJA-0007LJ-61 for qemu-devel@nongnu.org; Mon, 22 Jan 2024 10:33:57 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1705937635; 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; bh=LRdW7EioD3mIsQpRjt1TCNE7qSACJFjDUt0MKhTIlsc=; b=SPLmAvfvvggVzqDpjklWV6EvvQJ/ggDzUcbRg03c/weiVCA+TL7NR7ORXcjeCat5ufEFSw +b1UQTjdHF50dgWaRRLEPO5jk7WHGvsWBBJgO4BswweqsCx1zRnTDT1obiPpqrbVLHDDqI Va6X8a5MQGlw9IFX/oCxkXz/DZ7lwwU= Received: from mimecast-mx02.redhat.com (mimecast-mx02.redhat.com [66.187.233.88]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-14-EbVfNEVtOCS9x6YPNeENCQ-1; Mon, 22 Jan 2024 10:33:53 -0500 X-MC-Unique: EbVfNEVtOCS9x6YPNeENCQ-1 Received: from smtp.corp.redhat.com (int-mx08.intmail.prod.int.rdu2.redhat.com [10.11.54.8]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id 8C0CE85A589; Mon, 22 Jan 2024 15:33:52 +0000 (UTC) Received: from thuth-p1g4.redhat.com (unknown [10.39.193.179]) by smtp.corp.redhat.com (Postfix) with ESMTP id B5FC0C259DD; Mon, 22 Jan 2024 15:33:48 +0000 (UTC) From: Thomas Huth To: qemu-devel@nongnu.org Cc: =?UTF-8?q?Daniel=20P=20=2E=20Berrang=C3=A9?= , =?UTF-8?q?Alex=20Benn=C3=A9e?= , Peter Maydell , Reinoud Zandijk , Ryo ONODERA , Brad Smith Subject: [PATCH] tests/unit/test-iov: Fix timeout problem on NetBSD and OpenBSD Date: Mon, 22 Jan 2024 16:33:47 +0100 Message-ID: <20240122153347.71654-1-thuth@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-Scanned-By: MIMEDefang 3.4.1 on 10.11.54.8 Received-SPF: pass client-ip=170.10.133.124; envelope-from=thuth@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -33 X-Spam_score: -3.4 X-Spam_bar: --- X-Spam_report: (-3.4 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-1.289, 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_H3=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org The test-iov code uses usleep() with small values (<= 30) in some nested loops with many iterations. This causes a small delay on OSes like Linux that have a precise sleeping mechanism, but on systems like NetBSD and OpenBSD, each usleep() call takes multiple microseconds, which then sum up in a total test time of multiple minutes! Looking at the code, the usleep() does not really seem to be necessary here - if not enough data could be send, we should simply always use select() to wait 'til we can send more. Thus remove the usleep() and re-arrange the code a little bit to make it more clear what is going on here. Suggested-by: Daniel P. Berrangé Signed-off-by: Thomas Huth --- tests/unit/test-iov.c | 20 +++++++++++--------- 1 file changed, 11 insertions(+), 9 deletions(-) diff --git a/tests/unit/test-iov.c b/tests/unit/test-iov.c index 6f7623d310..75bc3be005 100644 --- a/tests/unit/test-iov.c +++ b/tests/unit/test-iov.c @@ -197,15 +197,17 @@ static void test_io(void) s = g_test_rand_int_range(0, j - k + 1); r = iov_send(sv[1], iov, niov, k, s); g_assert(memcmp(iov, siov, sizeof(*iov)*niov) == 0); - if (r >= 0) { - k += r; - usleep(g_test_rand_int_range(0, 30)); - } else if (errno == EAGAIN) { - select(sv[1]+1, NULL, &fds, NULL, NULL); - continue; - } else { - perror("send"); - exit(1); + if (r < 0) { + if (errno == EAGAIN) { + r = 0; + } else { + perror("send"); + exit(1); + } + } + k += r; + if (k < j) { + select(sv[1] + 1, NULL, &fds, NULL, NULL); } } while(k < j); } -- 2.43.0