From mboxrd@z Thu Jan 1 00:00:00 1970 From: Rob Gardner Subject: Re: help with horrible network failures Date: Wed, 02 Mar 2005 11:10:40 -0700 Message-ID: <422601A0.3000108@hp.com> References: Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit In-Reply-To: Sender: xen-devel-admin@lists.sourceforge.net Errors-To: xen-devel-admin@lists.sourceforge.net List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , List-Archive: Cc: xen-devel List-Id: xen-devel@lists.xenproject.org Ian Pratt wrote: > > Rob Gardner wrote: >>I've got two machines running identical versions of xen & >>linux. One of >>them constantly has problems under high network loads >>(70-100% httperf >>loads). This is using xen-unstable checked out on or about >>Feb 13. Any >>clues? See below for details. > One machine exhibits the bug, the other doesn't? How similar is the h/w? The machine with the problem: Intel e100 nic 1.7 Ghz Xeon The machine that does not exhibit the problem: Tigon3 nic 2.6Ghz P4 > > Can you reproduce with a single high-rate TCP stream? No. The problem seems to stem from the creation or use of lots of multiple streams. > Can you reproduce with an older version of Xen? We have not seen this problem before using countless older versions of xen. > Do you have any of > the iptables/netfilter connection tracking stuff in your kernel? We're using vanilla xen-unstable, haven't changed any parameters at all: # # IP: Virtual Server Configuration # # CONFIG_IP_VS is not set # CONFIG_IPV6 is not set CONFIG_NETFILTER=y # CONFIG_NETFILTER_DEBUG is not set CONFIG_BRIDGE_NETFILTER=y # # IP: Netfilter Configuration # CONFIG_IP_NF_CONNTRACK=m CONFIG_IP_NF_CT_ACCT=y # CONFIG_IP_NF_CONNTRACK_MARK is not set # CONFIG_IP_NF_CT_PROTO_SCTP is not set CONFIG_IP_NF_FTP=m # CONFIG_IP_NF_IRC is not set # CONFIG_IP_NF_TFTP is not set # CONFIG_IP_NF_AMANDA is not set # CONFIG_IP_NF_QUEUE is not set CONFIG_IP_NF_IPTABLES=m # CONFIG_IP_NF_MATCH_LIMIT is not set CONFIG_IP_NF_MATCH_IPRANGE=m # CONFIG_IP_NF_MATCH_MAC is not set # CONFIG_IP_NF_MATCH_PKTTYPE is not set # CONFIG_IP_NF_MATCH_MARK is not set # CONFIG_IP_NF_MATCH_MULTIPORT is not set # CONFIG_IP_NF_MATCH_TOS is not set # CONFIG_IP_NF_MATCH_RECENT is not set # CONFIG_IP_NF_MATCH_ECN is not set # CONFIG_IP_NF_MATCH_DSCP is not set # CONFIG_IP_NF_MATCH_AH_ESP is not set # CONFIG_IP_NF_MATCH_LENGTH is not set # CONFIG_IP_NF_MATCH_TTL is not set # CONFIG_IP_NF_MATCH_TCPMSS is not set # CONFIG_IP_NF_MATCH_HELPER is not set # CONFIG_IP_NF_MATCH_STATE is not set # CONFIG_IP_NF_MATCH_CONNTRACK is not set # CONFIG_IP_NF_MATCH_OWNER is not set # CONFIG_IP_NF_MATCH_PHYSDEV is not set # CONFIG_IP_NF_MATCH_ADDRTYPE is not set # CONFIG_IP_NF_MATCH_REALM is not set # CONFIG_IP_NF_MATCH_SCTP is not set # CONFIG_IP_NF_MATCH_COMMENT is not set # CONFIG_IP_NF_MATCH_HASHLIMIT is not set CONFIG_IP_NF_FILTER=m CONFIG_IP_NF_TARGET_REJECT=m # CONFIG_IP_NF_TARGET_LOG is not set # CONFIG_IP_NF_TARGET_ULOG is not set # CONFIG_IP_NF_TARGET_TCPMSS is not set CONFIG_IP_NF_NAT=m CONFIG_IP_NF_NAT_NEEDED=y CONFIG_IP_NF_TARGET_MASQUERADE=m # CONFIG_IP_NF_TARGET_REDIRECT is not set # CONFIG_IP_NF_TARGET_NETMAP is not set # CONFIG_IP_NF_TARGET_SAME is not set # CONFIG_IP_NF_NAT_LOCAL is not set # CONFIG_IP_NF_NAT_SNMP_BASIC is not set CONFIG_IP_NF_NAT_FTP=m # CONFIG_IP_NF_MANGLE is not set # CONFIG_IP_NF_RAW is not set # CONFIG_IP_NF_ARPTABLES is not set # CONFIG_IP_NF_COMPAT_IPCHAINS is not set # CONFIG_IP_NF_COMPAT_IPFWADM is not set # # Bridge: Netfilter Configuration # # CONFIG_BRIDGE_NF_EBTABLES is not set ------------------------------------------------------- SF email is sponsored by - The IT Product Guide Read honest & candid reviews on hundreds of IT Products from real users. Discover which products truly live up to the hype. Start reading now. http://ads.osdn.com/?ad_id=6595&alloc_id=14396&op=click