[ltp] cpu load on PCMCIA usage

[Dan Sawyer]

I did the same experiment between a Linksys on a 600e and a generic 2000 
on a 500 mhz deskside.

The results were the same:

    the 600e pegged at between 80% and 90% while the deskside idled at 
less the 10%.

Are there Linux performance tools?

Thanks,
Dan

Dean L. Hedin wrote:

>You might want to try irqtune.  It's intended use is to switch
>irq priorities to enhance serial modem performance.  But it
>might work with the ethernet.  Not sure if it will work with
>recent kernels though...
>
>On Sunday 10 November 2002 06:02 pm, Maik Musall wrote:
>  
>
>>Hello all,
>>
>>I've been using Linux with kernels from 2.4.4 to 2.4.19 on my 600X for
>>years now, and everything's working, but all those years there's one thing
>>that still annoys me.
>>
>>I have five different pcmcia network devices in use.
>>1. Lucent Wireless LAN, 11 MBit
>>2. Linksys 10/100 MBit+Modem
>>3. D-Link 10 MBit
>>4. 3com 3c589, 10 MBit
>>5. Silicom 10 MBit
>>
>>All do work basically, but when transferring at about 1 MByte/s (10 MBit),
>>the cpu load is always at almost 100% system time. As a consequence,
>>I did not manage to transfer more than 1.4 MByte/s over the 100MBit
>>Linksys card instead of 7-9 MByte/s. The cpu is the bottleneck.
>>
>>When I transfer a large file to my K6-233 with Intel EtherExpressPro-100,
>>that machine idles around at 5% load, while my PIII-500 600X Thinkpad
>>sticks at 100% cpu, limiting the transfer rate.
>>
>>Protocol does not matter, occurs with ftp as with rcp or nfs or even
>>a simple netcat from /dev/zero on one to /dev/null on the other side.
>>Also, direction of transfer does not matter.
>>
>>Is that normal? Are there parameters for the i82365 that I don't know
>>of that may improve this? Or any other hint where to look?
>>
>>Here's part of my config.opts:
>>------- snip
>>include port 0x100-0x4ff, port 0x800-0x8ff, port 0xc00-0xcff
>>include memory 0xc0000-0xfffff
>>include memory 0xa0000000-0xa0ffffff, memory 0x60000000-0x60ffffff
>>include port 0xa00-0xaff
>>exclude irq 4
>>exclude irq 3
>>exclude irq 7
>>------- snap
>>
>>Thanks and regards
>>    
>>