Re: [PATCH] tcp: Fix RFC reference in comment

2015-01-13 Thread John Heffner
On Tue, Jan 13, 2015 at 4:42 PM, Banerjee, Debabrata wrote: > On 1/13/15, 4:36 PM, "Yuchung Cheng" wrote: > >>On Tue, Jan 13, 2015 at 1:10 PM, Debabrata Banerjee >>wrote: >>> >>> -/* RFC2861. Reset CWND after idle period longer RTO to "restart >>>window". >>> +/* RFC2581 4.1. Reset CWND after id

Re: A call to revise sockets behaviour

2013-07-29 Thread John Heffner
On Mon, Jul 29, 2013 at 2:02 PM, Artem S. Tashkinov wrote: > Jul 29, 2013 11:43:00 PM, Eric wrote: > On Mon, 2013-07-29 at 15:47 +, Artem S. Tashkinov wrote: >> >>> A wine developer clearly showed that this option simply doesn't work. >>> >>> http://bugs.winehq.org/show_bug.cgi?id=26031#c21 >>

Re: UDP packets loss

2006-11-16 Thread John Heffner
[EMAIL PROTECTED] wrote: Hi, I am running a client/server test app over IPOIB in which the client sends a certain amount of data to the server. When the transmittion ends, the server prints the bandwidth and how much data it received. I can see that the server reports it received about 60% that t

Re: Possible BUG in IPv4 TCP window handling, all recent 2.4.x/2.6.x kernels

2005-09-02 Thread John Heffner
On Sep 2, 2005, at 10:33 AM, [EMAIL PROTECTED] wrote: On Fri, 2 Sep 2005, John Heffner wrote: Have you tried increasing the size of the receive buffer yet? Actually, I just did. I changed rmem_max and rmem_default to 4MB and tcp_rmem to "64k 4MB 4MB". It did seem to help, but I&#

Re: Possible BUG in IPv4 TCP window handling, all recent 2.4.x/2.6.x kernels

2005-09-02 Thread John Heffner
On Sep 2, 2005, at 9:48 AM, Alexey Kuznetsov wrote: Hello! If you overflow the socket's memory bound, it ends up calling tcp_clamp_window(). (I'm not sure this is really the right thing to do here before trying to collapse the queue.) Collapsing is too expensive procedure, it is rather an

Re: Possible BUG in IPv4 TCP window handling, all recent 2.4.x/2.6.x kernels

2005-09-02 Thread John Heffner
On Sep 2, 2005, at 9:52 AM, Alexey Kuznetsov wrote: Hello! I experienced the very same problem but with window size going all the way down to just a few bytes (14 bytes). dump files available upon requests :) I do request. TCP is not allowed to reduce window to a value less than 2*MSS no m

Re: Possible BUG in IPv4 TCP window handling, all recent 2.4.x/2.6.x kernels

2005-09-02 Thread John Heffner
On Sep 2, 2005, at 10:05 AM, [EMAIL PROTECTED] wrote: This particular Win2k sender sends _only_ real-time data, it's not capable of rewinding. So it's always sending small packets, from start to finish, yet the problem still occurs. Note that even real-time data can end up generating a stream

Re: Possible BUG in IPv4 TCP window handling, all recent 2.4.x/2.6.x kernels

2005-09-01 Thread John Heffner
On Sep 1, 2005, at 6:53 PM, Ion Badulescu wrote: A few minutes later it has finally caught up to present time and it starts receiving smaller packets containing real-time data. The TCP window is still 16534 at this point. [tcpdump output removed] This is where things start going bad. The wi

Re: [PATCH] TCP-Hybla proposal

2005-02-22 Thread John Heffner
On Tue, 22 Feb 2005, Stephen Hemminger wrote: > On Tue, 22 Feb 2005 15:34:42 +0100 > Daniele Lacamera <[EMAIL PROTECTED]> wrote: > > > One last note: IMHO we really need a better way to select congestion > > avoidance scheme between those available, instead of switching each one > > on and off. I.

Re: BUG in 2.4.0: dd if=/dev/random of=out.txt bs=10000 count=100

2001-01-12 Thread John Heffner
> dd says it completes happily even when copying from > random. 0+100 records in, 0+100 records out. It This means that dd completed 100 reads, and none of them were of the requested length (1 bytes). > takes about thirty seconds to finish on the dual > gigahertz processor intel box I'm us

Re: Network Performance?

2001-01-09 Thread John Heffner
On Tue, 9 Jan 2001, Tim Sailer wrote: > Here is some more data: > > Inbound = 99.66 kB/s > Outbound= 151 kB/s > > > > ports:/home/ftp# sysctl -a | fgrep net/core > net/core/optmem_max = 10240 > net/core/message_burst = 50 > net/core/

Re: Network Performance?

2001-01-08 Thread John Heffner
On Mon, 8 Jan 2001, Tim Sailer wrote: > > What is the round-trip time on the WAN? > > > > Packet loss? > > 101 packets transmitted, 101 packets received, 0% packet loss > round-trip min/avg/max = 109.6/110.3/112.2 ms Packet loss and RTT can be greatly affected by how much data you're sending t