About TODO Blog RSS Old blog Projects Gallery Notes

Sat, 14 Jun 2008

New userspace network stack release.

Fixed bug found by Salvatore Del Popolo (delpopolo_dit.unitn.it) in TCP implementation, when system checked sending window and determined, that packet was not allowed to be sent and nevertheless tried to do so in some cases.

Userspace network stack is a very fast (if working on top of netchannels, also supported packet socket) and very small network stack (TCP/UDP/IP/ethernet) implemeneted entirely in userspace. Because of it lives near the very the end of the peer (i.e. very close or even embedded into application), it allows much faster processing of some workloads, namely small packet sending and receiving, where it outperforms vanilla Linux TCP/IP stack 3 times in performance and 4 times CPU usage (sending and receiving vary).



Comapre netchannels+unetstack versus Linux sockets (2006 year numbers).

It is not about problems in the Linux stack, but overhead of syscalls, which are in turn results of too separate data sending and reply processing in the existing model.

/devel/networking/unetstack :: Link / Comments (0)

Fri, 14 Dec 2007

New release of the userspace network stack.

Changed data reading function, now it does not copy TCP header into user's buffer, only data, and forced packet socket reading path to limit maximum number of packets to be read, which do not match created netchannel.
As usual, new release is available from project homepage.

/devel/networking/unetstack :: Link / Comments (0)

Tue, 06 Nov 2007

New release of the userspace network stack.

It is based on patches by Holger Schurig (holgerschurig_gmx.de).
Short changelog for this unetstack release:

• added netchannel.h, which allows to compile userspace network stack without netchannels support in the kernel
• killed warnings about unused wariables

/devel/networking/unetstack :: Link / Comments (0)