[freetds] FreeBSD 5.0 performance problems with TCP_NOPUSH
Peter Deacon
peterd at iea-software.com
Tue Mar 15 03:35:19 EST 2005
On Tue, 15 Mar 2005, ZIGLIO, Frediano, VF-IT wrote:
> I don't have FreeBSD to test with. What I did is to search on internet
> an option similar to TCP_CORK. Some mails (4 year ago!!) reported that
> newer behavior of TCP_NO_PUSH was equal to TCP_CORK. Today I tried to
> search again and I found a patch that add support for TCP_CORK even to
> FreeBSD... I don't know if this patch has been committed.
> You tested that TCP_NOPUSH under FreeBSD 5.0 do not work correctly so
> would be so kind to try with
> /* Try to use TCP_CORK on *BSD */
> #elif (defined(__FreeBSD__) || defined(__GNU_FreeBSD__) ||
> defined(__OpenBSD__)) && defined(TCP_CORK)
> #define USE_CORK 1
Hi Freddy,
That works fine on my FreeBSD 5.0 system.
FWIW here are the avaliable options from tcp.h
#define TCP_NODELAY 0x01 /* don't delay send to coalesce packets */
#if __BSD_VISIBLE
#define TCP_MAXSEG 0x02 /* set maximum segment size */
#define TCP_NOPUSH 0x04 /* don't push last block of write */
#define TCP_NOOPT 0x08 /* don't use TCP options */
#endif
Have Fun!
Peter
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