Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753131AbXI0D7D (ORCPT ); Wed, 26 Sep 2007 23:59:03 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751695AbXI0D6u (ORCPT ); Wed, 26 Sep 2007 23:58:50 -0400 Received: from mail-gw17.credit-suisse.com ([198.240.130.182]:36732 "EHLO nys17a-3002.corpny.csfb.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1751657AbXI0D6t (ORCPT ); Wed, 26 Sep 2007 23:58:49 -0400 X-Server-Uuid: 4EAC7D12-E00D-46D7-91F2-2C1B0FAC6618 X-Server-Uuid: 08F52AA2-166F-476D-B0A0-AD41BF62CDCC Message-ID: From: "Majumder, Rajib" To: "'netdev@vger.kernel.org'" , "'linux-kernel@vger.kernel.org'" Subject: TCP Spike Date: Thu, 27 Sep 2007 11:58:01 +0800 MIME-Version: 1.0 X-Mailer: Internet Mail Service (5.5.2655.55) X-WSS-ID: 6AE5F5C52I01951142-01-01 X-WSS-ID: 6AE5F5D43WO54487-01-05 Content-Type: text/plain Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 959 Lines: 27 Hi, We have observed 40ms latency spikes in TCP connections in "burst" type of traffic. This affects regular TCP sockets. We observed this issue in kernels of 2.4.21 and kernel 2.6.5. Aparently, this seems to be fixed in 2.6.19. Can someone throw some light on this? Is this a congestion control/avoidance issue? What congestion control algorithm is used before 2.6.8? Thanks Rajib ============================================================================== Please access the attached hyperlink for an important electronic communications disclaimer: http://www.credit-suisse.com/legal/en/disclaimer_email_ib.html ============================================================================== - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/