Hping/Ping

[Dave Raven]

Ingo, you are a lifesaver!

intr_queue_drops was rising very quickly, after changing queue_maxlen to 500
(from 50) the problems all went away. What's a reasonable value for that for
a high load box (5000+ interrupts a second) ?

Also, while over a 1000 pings have gone through fine now, a minute or two
after I made the change I saw this --

64 bytes from x.x.x.x: icmp_seq=25 ttl=255 time=0.465 ms
ping: sendto: No buffer space available
ping: sendto: No buffer space available
ping: sendto: No buffer space available
ping: sendto: No buffer space available
ping: sendto: No buffer space available
ping: sendto: No buffer space available
ping: sendto: No buffer space available
64 bytes from x.x.x.x: icmp_seq=35 ttl=255 time=0.294 ms

It hasn't happened again (and I hope it doesn't) - but is that something I
should look for?

Thank you again - very much
Dave


-----Original Message-----
From: Ingo Flaschberger [mailto:if at xip.at] 
Sent: Tuesday, February 26, 2008 9:28 PM
To: Dave Raven
Cc: freebsd-net at freebsd.org
Subject: RE: Hping/Ping

Dear Dave,

some more ideas:

sysctl -a | fgrep ip.intr_qu

Kind regards,
  	Ingo Flaschberger