Artyom Viklenko wrote:
Cristian KLEIN wrote:
Thank you all for your replies.
Kirill Ponazdyr wrote:
Hi list,
A few days ago I tested whether a FreeBSD 7 box is able to handle
Gigabit
Can anybody point me what the bottleneck of this configuration is?
CPU was
mostly idle and PCIe 1x should carry way more. Or is the experiment
perhaps
fundamentally flawed?
ICMP is not a good way to perform such tests as many have mentioned,
better use iperf.
I used this test, because it proved perfect when, almost a decade ago,
gigabit
appeared. There wasn't anything at that time that could fill 1 Gbps,
so we used
the routers themselves to do the job. Also, I used this setup to avoid
TCPs
congestion control mecachnism and sub-maximum bandwidth.
Of course, when I said "ping -f", I didn't mean a single "ping -f",
but rather
enough ping -f so that the looping packets would saturate the link.
You can use option -i instead of -f:
ping -nqs 1472 -i 0.00001 1.2.3.4
will generate large enougth amount of 1500 bytes packets.
Even more, use size more than 1472 and number of packets
will be increased. Value of -i parameter can be increased too.
But remember about sysctl variable net.inet.ip.maxfragsperpacket.
By default, in FreeBSD 6.x it's value is 16.
We have a FreeBSD 6.2 / pf box handling 2Gbps of traffic, real
traffic, it
will probably handle more, we just had no capacities or need to test.
Hardware is a Single 2.4 Ghz Xeon with 2 x Intel Quad Pro 1000MT PCI-X
Controllers on separate PCI-X Busses.
Could you tell me, is there any difference between 1000PT and 1000MT,
except the
slot type? Also, is there any difference between Intel Desktop and
Intel Server
adaptors, or are these just marketing buzzwords?
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you can use the netgraph source node that is an in-kernel packet source.
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