Re: Heavy I/O blocks FreeBSD box for several seconds

On Wed, Jul 6, 2011 at 10:55 PM, Hartmann, O. wrote: > On 07/07/11 06:29, Arnaud Lacombe wrote: >> >> Hi, >> >> On Wed, Jul 6, 2011 at 5:00 PM, Hartmann, O. >>  wrote: >>> >>> On 07/06/11 21:36, Steve Kargl wrote: On Wed, Jul 06, 2011 at 03:18:35PM -0400, Arnaud Lacombe wrote: > >>>

7.2-RELEASE performance of em + 9k MTU + tso on ESB2 chipset

While investigating a performance issue on a 7.2-RELEASE system I noticed iperf performance on systems with an ESB2 chipset (supermicro X7DBU onboard em) is worse when TSO is enabled at 9000 MTU: em0: flags=8843 metric 0 mtu 9000 options=19b ether 00:30:48:33:43:4e inet 10.