Date: Thu, 07 Feb 2008 22:59:26 -0200 From: =?ISO-8859-1?Q?Daniel_Dias_Gon=E7alves?= <daniel@dgnetwork.com.br> To: freebsd-net@freebsd.org Subject: DEVICE_POLLING IF_EM CPU usage Message-ID: <47ABA96E.4020800@dgnetwork.com.br>
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Hi,
I activated polling in 8 interfaces em0... em7 (ifconfig em* polling) to
carry through performance tests, when activating, it had a significant
reduction of CPU usage, load average measured of "0,50, 0,69, 0,52" for
"0,43, 0,39, 0,21" and the CPU usage (SNMP Graphic) measured of 35% for
5%. Passed some hours I disactivated polling (ifconfig em* - polling)
and CPU usage continues low.
Somebody could explain this to me?
Some information:
FreeBSD 6.3-RELEASE
CPU: Intel(R) Xeon(TM) CPU 3.20GHz (3200.13-MHz 686-class CPU)
Logical CPUs per core: 2
FreeBSD/SMP: Multiprocessor System Detected: 2 CPUs
SMP: AP CPU #1 Launched!
Interfaces if_em:
vendor = 'Intel Corporation'
device = '82546EB Dual Port Gigabit Ethernet Controller'
Thanks.
Daniel
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