From patchwork Thu Mar 16 09:21:15 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?Marc-Andr=C3=A9_Lureau?= X-Patchwork-Id: 9627729 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 5AA9B60244 for ; Thu, 16 Mar 2017 09:25:34 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 4865928356 for ; Thu, 16 Mar 2017 09:25:34 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 3D13628673; Thu, 16 Mar 2017 09:25:34 +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=-6.9 required=2.0 tests=BAYES_00,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id C9A6128356 for ; Thu, 16 Mar 2017 09:25:33 +0000 (UTC) Received: from localhost ([::1]:41812 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1coRf2-0007Xq-Ra for patchwork-qemu-devel@patchwork.kernel.org; Thu, 16 Mar 2017 05:25:32 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:47330) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1coRc8-0004og-C4 for qemu-devel@nongnu.org; Thu, 16 Mar 2017 05:22:33 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1coRc7-0000b4-2B for qemu-devel@nongnu.org; Thu, 16 Mar 2017 05:22:32 -0400 Received: from mx1.redhat.com ([209.132.183.28]:43810) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1coRc6-0000ah-Rr for qemu-devel@nongnu.org; Thu, 16 Mar 2017 05:22:30 -0400 Received: from smtp.corp.redhat.com (int-mx06.intmail.prod.int.phx2.redhat.com [10.5.11.16]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id DD382C04BD53 for ; Thu, 16 Mar 2017 09:22:30 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mx1.redhat.com DD382C04BD53 Authentication-Results: ext-mx07.extmail.prod.ext.phx2.redhat.com; dmarc=none (p=none dis=none) header.from=redhat.com Authentication-Results: ext-mx07.extmail.prod.ext.phx2.redhat.com; spf=pass smtp.mailfrom=marcandre.lureau@redhat.com DKIM-Filter: OpenDKIM Filter v2.11.0 mx1.redhat.com DD382C04BD53 Received: from localhost (ovpn-117-78.phx2.redhat.com [10.3.117.78]) by smtp.corp.redhat.com (Postfix) with ESMTP id 116995C3FA; Thu, 16 Mar 2017 09:22:29 +0000 (UTC) From: =?UTF-8?q?Marc-Andr=C3=A9=20Lureau?= To: qemu-devel@nongnu.org Date: Thu, 16 Mar 2017 13:21:15 +0400 Message-Id: <20170316092121.25672-16-marcandre.lureau@redhat.com> In-Reply-To: <20170316092121.25672-1-marcandre.lureau@redhat.com> References: <20170316092121.25672-1-marcandre.lureau@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.16 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.31]); Thu, 16 Mar 2017 09:22:31 +0000 (UTC) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 209.132.183.28 Subject: [Qemu-devel] [PATCH v3 15/21] char-udp: flush as much buffer as possible X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: pbonzini@redhat.com, =?UTF-8?q?Marc-Andr=C3=A9=20Lureau?= Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" X-Virus-Scanned: ClamAV using ClamSMTP Instead of flushing the buffer byte by byte, call qemu_chr_be_write() with as much byte possible accepted by the front-end. Factor out buffer flushing in a common function udp_chr_flush_buffer(). Signed-off-by: Marc-André Lureau Reviewed-by: Philippe Mathieu-Daudé --- chardev/char-udp.c | 26 +++++++++++++++----------- 1 file changed, 15 insertions(+), 11 deletions(-) diff --git a/chardev/char-udp.c b/chardev/char-udp.c index 804bd22efa..1958c36de4 100644 --- a/chardev/char-udp.c +++ b/chardev/char-udp.c @@ -51,6 +51,18 @@ static int udp_chr_write(Chardev *chr, const uint8_t *buf, int len) s->ioc, (const char *)buf, len, NULL); } +static void udp_chr_flush_buffer(UdpChardev *s) +{ + Chardev *chr = CHARDEV(s); + + while (s->max_size > 0 && s->bufptr < s->bufcnt) { + int n = MIN(s->max_size, s->bufcnt - s->bufptr); + qemu_chr_be_write(chr, &s->buf[s->bufptr], n); + s->bufptr += n; + s->max_size = qemu_chr_be_can_write(chr); + } +} + static int udp_chr_read_poll(void *opaque) { Chardev *chr = CHARDEV(opaque); @@ -61,11 +73,8 @@ static int udp_chr_read_poll(void *opaque) /* If there were any stray characters in the queue process them * first */ - while (s->max_size > 0 && s->bufptr < s->bufcnt) { - qemu_chr_be_write(chr, &s->buf[s->bufptr], 1); - s->bufptr++; - s->max_size = qemu_chr_be_can_write(chr); - } + udp_chr_flush_buffer(s); + return s->max_size; } @@ -85,13 +94,8 @@ static gboolean udp_chr_read(QIOChannel *chan, GIOCondition cond, void *opaque) return FALSE; } s->bufcnt = ret; - s->bufptr = 0; - while (s->max_size > 0 && s->bufptr < s->bufcnt) { - qemu_chr_be_write(chr, &s->buf[s->bufptr], 1); - s->bufptr++; - s->max_size = qemu_chr_be_can_write(chr); - } + udp_chr_flush_buffer(s); return TRUE; }