On Wed, Feb 29, 2012 at 01:46:03PM +0400, Slawa Olhovchenkov wrote: > On Wed, Feb 29, 2012 at 10:51:26AM +0100, Luigi Rizzo wrote: > > > On Wed, Feb 29, 2012 at 01:14:33PM +0400, Slawa Olhovchenkov wrote: > > > On Tue, Feb 28, 2012 at 10:58:56PM +0100, Luigi Rizzo wrote: > > > > > > > On Wed, Feb 29, 2012 at 12:35:23AM +0400, Slawa Olhovchenkov wrote: > > > > ... > > > > > > > > ?3. The two changes above unfortunately require an API change, > > > > > > > > so while > > > > > > > > ? ? at it add a version field and some spares to the ioctl() > > > > > > > > argument > > > > > > > > ? ? to help detect mismatches. > > > > > > > > > > > > > > Is it worth bumping __FreeBSD_version? > > > > > > > > > > > > I don't think it is necessary. > > > > > > There is basically no code that uses the netmap API except for > > > > > > the examples in tools/tools/netmap, and i now have a NETMAP_API > > > > > > macro > > > > > > > > > > no code in *FreeBSD base system*, yes? > > > > > because I am write tools uses the netmap API now. > > > > > > > > i am glad to hear that, and the NETMAP_API will serve you well > > > > because you can use the same also on the Linux version of netmap > > > > > > Can you explain some detail about netmap? > > > > > > 1. What is order of send packets from different rings? > > > 2. What is time packets sent? I am need sustain desired value of > > > transfer rate. > > > > Same as with the standard API: > > > > 1. it is the hardware that decides that. You can make no assumptions. > > 2. once again, once you have issued the system call, > > it is the hardware that decides when it will send packets out. > > Realy? I don't do any system call now and see transmited packets > (in dev.ix.0.mac_stats.tx_frames_XXX stats).
you MUST issue system calls (ioctl() or poll()) ) to have packets sent out. Please re-read the manpage. > 3. Jumbo frames support only throw tunable hw.netmap.buf_size? yes but in practice forget jumbo frames. There is no guarantees that the code works for buf_size > 4096 . Unless you want to use them to support NFS and 8K filesystem blocks (in which case there is a point - you have no fragmentation), jumbo frames are only useful with low-performance drivers. With netmap you have no such an issue. cheers luigi _______________________________________________ svn-src-head@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/svn-src-head To unsubscribe, send any mail to "svn-src-head-unsubscr...@freebsd.org"
