Slow networkperformance in current?

[Kip Macy]

10 GigE cards are doing line rate - over time the cpu usage required
to do so is going down. Your experience is probably due to NIC issues.
What kind of NIC are you using? And have you changed any configuration
or settings?

 -Kip

On 7/16/07, Ståle Kristoffersen <staale at kristoffersen.ws> wrote:
> A few months ago I tested my local network speed with iperf and got around
> 900Mbits/s. But with a newer current I get around 300Mbits/s, (using 100%
> cpu usage), and to localhost: 162 Mbits/sec.
>
> I'm running iperf -s in one terminal and iperf -c localhost on another.
>
> FreeBSD 7.0-CURRENT #9: Mon Jul  9 13:18:23 CEST
> 2007     root at fs:/usr/obj/usr/src/sys/FS  i386
>
> Stock kernel, but removed debuging and witness, and using SCHED_ULE.
>
> Not knowing where to look I tried to update.
> Recompiled with updated source and with SCHED_4BSD:
> FreeBSD 7.0-CURRENT #9: Mon Jul  9 13:18:23 CEST
> 2007     root at fs:/usr/obj/usr/src/sys/FS  i386
>
> Same problem, am I missing something obvious here? This does not look like
> the correct numbers:
> [  4] local 127.0.0.1 port 5001 connected with 127.0.0.1 port 58497
> [  4]  0.0-10.5 sec    172 MBytes    137 Mbits/sec
>
>
> CPU: Intel(R) Pentium(R) D CPU 2.80GHz (2856.02-MHz 686-class CPU)
>   Origin = "GenuineIntel"  Id = 0xf47  Stepping = 7
>   Features=0xbfebfbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CLFLUSH,DTS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,PBE>
>   Features2=0x641d<SSE3,RSVD2,MON,DS_CPL,CNXT-ID,CX16,xTPR>
>   AMD Features=0x20100000<NX,LM>
>   AMD Features2=0x1<LAHF>
>   Cores per package: 2
> real memory  = 1072562176 (1022 MB)
> avail memory = 1036025856 (988 MB)
> FreeBSD/SMP: Multiprocessor System Detected: 2 CPUs
>
> --
> Ståle Kristoffersen
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