From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Fri, 25 May 2001 17:50:35 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Fri, 25 May 2001 17:50:25 -0400 Received: from dewey.mindlink.net ([204.174.16.4]:63749 "EHLO dewey.paralynx.net") by vger.kernel.org with ESMTP id ; Fri, 25 May 2001 17:50:12 -0400 Subject: PROBLEM: Alpha SMP Low Outbound Bandwidth From: Jay Thorne To: linux-kernel@vger.kernel.org Content-Type: text/plain X-Mailer: Evolution/0.10 (Preview Release) Date: 25 May 2001 14:50:07 -0700 Message-Id: <990827407.27355.2.camel@gracie.userfriendly.org> Mime-Version: 1.0 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org [1.] One line summary of the problem: Kernel 2.4.4 ac15 Tested with several cards and pieces of software, the outbound bandwidth on a quad cpu alpha is 2 megabytes a second or less on a 100 mbit switched ethernet network. Other machines on same switch do 10 or more megabytes per second. Switch is DLink 3624, 24 port, only 12 ports in use. [2.] Full description of the problem/report: Using a quad 400Mhz Dodge/Rawhide machine with Tulip or VIARhine cards, on wuFTP, the outbound bandwidth tops out at 2 megabytes per second and the inbound at 6 megabytes per second. Also noticeable are apparent slowdowns or console lockups/sluggishness during the transfer. [3.] Keywords (i.e., modules, networking, kernel): networking, alpha, tulip, via_rhine [4.] Kernel version (from /proc/version): Linux version 2.4.4-ac15 (root@lister) (gcc version 2.96 20000731 (SuSE Linux 7.1/Alpha)) #1 SMP Thu May 24 18:41:13 PDT 2001 [5.] Output of Oops.. message (if applicable) with symbolic information resolved (see Documentation/oops-tracing.txt) [6.] A small shell script or example program which triggers the problem (if possible) Problem machine: ncftp /tmp > put foo foo: 34.38 MB 5.16 MB/s ncftp /tmp > get -z foo baz baz: 34.38 MB 1.16 MB/s other machine on same switch to same ftp server. ncftp /home/jay > get foo foo: 34.38 MB 10.12 MB/s ncftp /home/jay > put -z foo baz foo: 34.38 MB 9.93 MB/s [7.] Environment [7.1.] Software (add the output of the ver_linux script here) Linux lister 2.4.4-ac15 #1 SMP Thu May 24 18:41:13 PDT 2001 alpha unknown Gnu C 2.96 Gnu make 3.79.1 binutils 2.10.0.33 util-linux 2.10q mount 2.10q modutils 2.4.2 e2fsprogs 1.19 pcmcia-cs 3.1.22 PPP 2.4.0 isdn4k-utils 3.1pre1a Linux C Library so.6.1 Dynamic linker (ldd) 2.2 Procps 2.0.7 Net-tools 1.57 Kbd 1.02 Sh-utils 2.0 Modules Loaded tulip via-rhine [7.2.] Processor information (from /proc/cpuinfo): lister:/usr/src/linux # cat /proc/cpuinfo cpu : Alpha cpu model : EV56 cpu variation : 7 cpu revision : 0 cpu serial number : system type : Rawhide system variation : Dodge system revision : 0 system serial number : NI70904KB0 cycle frequency [Hz] : 400000000 timer frequency [Hz] : 1200.00 page size [bytes] : 8192 phys. address bits : 40 max. addr. space # : 127 BogoMIPS : 738.12 kernel unaligned acc : 1646246 (pc=fffffc000042a3d8,va=fffffc005d9b784e) user unaligned acc : 0 (pc=0,va=0) platform string : AlphaServer 4100 5/400 4MB cpus detected : 4 cpus active : 4 cpu active mask : 000000000000000f [7.3.] Module information (from /proc/modules): lister:/usr/src/linux # cat /proc/modules tulip 59296 1 via-rhine 16464 0 (autoclean) [7.4.] Loaded driver and hardware information (/proc/ioports, /proc/iomem) lister:/usr/src/linux # cat /proc/ioports 00000000-0000ffff : PCI IO bus 0 00000000-0000001f : dma1 00000020-0000003f : pic1 00000040-0000005f : timer 00000060-0000006f : keyboard 00000070-00000080 : rtc 00000070-0000007f : rtc 000000a0-000000bf : pic2 000000c0-000000df : dma2 000002f8-000002ff : serial(auto) 000003f8-000003ff : serial(auto) 00008000-000080ff : VIA Technologies, Inc. Ethernet Controller 00008000-000080ff : via-rhine 00008400-0000847f : Digital Equipment Corporation DECchip 21140 [FasterNet] 00008400-0000847f : tulip 200000000-20000ffff : PCI IO bus 1 200008000-2000080ff : Symbios Logic Inc. (formerly NCR) 53c810 200008000-20000807f : ncr53c8xx 200009000-2000090fe : qlogicisp lister:/usr/src/linux # cat /proc/iomem 00000000-ffffffff : PCI mem bus 0 00000000-07ffffff : HAE0 02200000-0223ffff : Digital Equipment Corporation DECchip 21140 [FasterNet] 02240000-0224ffff : S3 Inc. 86c764/765 [Trio32/64/64V+] 02250000-0225ffff : VIA Technologies, Inc. Ethernet Controller 02260000-022600ff : VIA Technologies, Inc. Ethernet Controller 02260000-022600ff : via-rhine 02261000-0226107f : Digital Equipment Corporation DECchip 21140 [FasterNet] 02261000-0226107f : tulip 200000000-2ffffffff : PCI mem bus 1 200000000-207ffffff : HAE0 202200000-2022000ff : Symbios Logic Inc. (formerly NCR) 53c810 [7.5.] PCI information ('lspci -vvv' as root) lister:/usr/src/linux # lspci -vvv 00:01.0 Non-VGA unclassified device: Intel Corporation 82375EB (rev 05) Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- Status: Cap- 66Mhz- UDF- FastB2B- ParErr- DEVSEL=medium >TAbort- SERR- TAbort- SERR- TAbort- SERR- TAbort- SERR- TAbort- SERR- TAbort- SERR- Reset- FastB2B- 02:00.0 SCSI storage controller: Q Logic ISP1020 (rev 02) Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr+ Stepping- SERR+ FastB2B- Status: Cap- 66Mhz- UDF- FastB2B- ParErr- DEVSEL=medium >TAbort- SERR-