hi guys! well, i changed my motherboard and CPU from the asus a7v8x+amd 2000+ xp to the abit be7 + p4 2.4 (533fsb) and the packet loss fell down from 8% to 2%, but still have loss... loss coming when i have load.. i guess it decreased because of the bigger resources. still waiting for tipps, hints, everything :)
----- Original Message ----- From: Jin Guojun [VFFS] To: Arne Woerner Cc: Gary Thorpe ; freebsd-performance@freebsd.org ; [EMAIL PROTECTED] Sent: Wednesday, March 22, 2006 6:23 PM Subject: Re: packet drop with intel gigabit / marwell gigabit Arne Woerner wrote: --- "Jin Guojun [VFFS]" <[EMAIL PROTECTED]> wrote: In you example: Now your 1.6 GB/s reduced to 16MB/s or even worse just based on this factor. What did we show by this <<dd if=/dev/zero ...>> test? I thought that would prove the memory bandwidth is about 8Gbit/sec (1GByte/sec; 2 * <dd's bytes/sec number>/2^30). It depends on how you use /dev/zero. dd of=/dev/null if=/dev/zero bs=4k count=100k tests cache speed dd of=/dev/null if=/dev/zero bs=4m count=100 tests memory bandwidth if your cache is less than 2 MB Now you may give me the real memory bandwidth on your system :-) I would expect something around 500. Notice that your memory copy speed will be one half of it. /dev/null device really does nothing beside throwing away data. That is, it can be counted as a cost for system call. -Jin _______________________________________________ freebsd-performance@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-performance To unsubscribe, send any mail to "[EMAIL PROTECTED]"