Re: TG3: very high CPU usage

[Andreas Hartmann]

Mark Williams (MWP) wrote:
[...]
> However, when using Apache or any FTP client/daemon, the TG3 driver appears to be VERY slow maxing out CPU usage at 100% while only transfering at around 12MB/sec.
> This applies for both incoming or outgoing data.

[...]

> Ive tried other NICs, etc and confirmed that it is a problem with the TG3 driver.

I saw the same problem with the bcm-driver (Kernel 2.4.x) shipped with
SuSE 9 / SLES 8. Testcase was the initial mirror of a 10 GB partition on a
raid5 serveraid / XSeries 235 (2 way) to the same hardware on the remote
machine using both times the onboard NIC (Broadcom GBit Ethernet) via drbd:
100% CPU usage, 12 MB/s, machine is nearly death.


Regards,
Andreas Hartmann
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