: :OK Matt, that last patch did the trick. : :I am now getting 68 and 69Mb/s between my Linux system and the FreeBSD :system.
Excellent! :I have also tried the loopback interface, and I am getting 371Mb/s for 1 process, :dropping to about 320Mb/s for 5. Excellent! :This seems like it is close to the limit for the machine I am using, as :CPU hits 100% when I ran the above tbench runs. : :I will have to try it with Gigabit Ethernet, but won't be able to do so :until next week or the week after (after I get to the US). Here's what I get over a gigabit ethernet link between two DELL2550's: ./tbench 1 10.1.0.1 Throughput 7.72693 MB/sec (NB=9.65866 MB/sec 77.2693 MBit/sec) 1 procs ./tbench 2 10.1.0.1 Throughput 17.1535 MB/sec (NB=21.4418 MB/sec 171.535 MBit/sec) 2 procs ./tbench 3 10.1.0.1 Throughput 23.185 MB/sec (NB=28.9813 MB/sec 231.85 MBit/sec) 3 procs ./tbench 4 10.1.0.1 Throughput 24.041 MB/sec (NB=30.0512 MB/sec 240.41 MBit/sec) 4 procs ./tbench 6 10.1.0.1 Throughput 33.8823 MB/sec (NB=42.3528 MB/sec 338.823 MBit/sec) 6 procs ./tbench 8 10.1.0.1 Throughput 40.9986 MB/sec (NB=51.2482 MB/sec 409.986 MBit/sec) 8 procs ./tbench 10 10.1.0.1 Throughput 43.8519 MB/sec (NB=54.8149 MB/sec 438.519 MBit/sec) 10 procs ./tbench 15 10.1.0.1 Throughput 46.8878 MB/sec (NB=58.6098 MB/sec 468.878 MBit/sec) 15 procs ./tbench 20 10.1.0.1 Throughput 47.2446 MB/sec (NB=59.0558 MB/sec 472.446 MBit/sec) 20 procs It seems to max-out at around 75,000 packets per second (input + output). I doubt these results could be duplicated on anything but a DELL2550. It dedicates an entire internal 64 bit 66MHz PCI bus just to the on-board gigabit ethernet. test1:/home/dillon/dbench> netstat -in 1 input (Total) output packets errs bytes packets errs bytes colls 38680 0 37237815 36340 0 20079011 0 41770 0 45968686 33317 0 13029493 0 33282 0 17257495 38002 0 29369102 0 ... :Does the FreeBSD tcp stack do zero copy (page flip the data to :userspace)? In the localhost case, it seems like there are two copies :to/from userspace there. : :-- :Richard Sharpe, [EMAIL PROTECTED], LPIC-1 There are zero-copy patches floating around but I haven't looked at them to determine how messy they might be. -Matt Matthew Dillon <[EMAIL PROTECTED]> To Unsubscribe: send mail to [EMAIL PROTECTED] with "unsubscribe freebsd-hackers" in the body of the message