Part 2.3: adapters' performance with dynamically changed data packets (NetPIPE), average retail prices, conclusions
In this case the graphs show the adapter's stability (speed invariability) in the whole range from minimum to maximum data blocks. If the graph line is smooth, then it's all right, gaps indicate that the adapter has a performance problem at this particular block size.
Throughput dependence on the transmitted packet size for each adapter, NetPIPE, Linux
Both embedded gigabit chips from Intel demonstrate somewhat "twitched" graphs, though all the gaps are insignificant.
No anomalies were detected in 3Com 3C996B-T.
We managed to test CNet ProG2000L only with giga-frames disabled, but even in this case there is something wrong with this adapter (or its drivers). It shows performance falls with some packet sizes.
Hardlink HA-64G is also doing all right.
TRENDnet TEG-PCISXM2, based on a Marvell Yukon 88E8010 chip, shows performance falls with Jumbo frames below 9000 bytes. The smaller is MTU size, the more gaps appear. The situation abruptly changes only with 9 KB frames gaps disappear.
ZyXEL Omni Lan PCI G1 is OK.
I have united all adapters from SysKonnect in one group, because they all demonstrate the same gaps in performance graphs, similar to TRENDnet TEG-PCISXM2. And again like in TEG-PCISXM2, the gaps disappear with 9 KB frames. As all these adapters (SysKonnect and TRENDnet) were tested using the same driver, it's most likely the driver's fault.
That's why, though adapters from SysKonect demonstrated excellent performance, the bug with speed drops with certain packet sizes is irritating.
Throughput dependence on the transmitted packet size for each adapter, grouped by MTU.
Besides performance and CPU load, any adapter is characterized by its price. It is not taken into consideration in the index formula, it is just displayed below in the form of a table. Unfortunately, this table does not include cards from Intel, as we tested only embedded solutions. All the adapters reviewed can be bought in Moscow, except for the cards from SysKonnect, at least we didn't manage to find them in price.ru.
Average retail price of gigabit adapters for the present moment:
|TRENDnet TEG-PCISXM2||$156(ha 20.05.04)|
|ZyXEL Omni Lan PCI G1||$36(41)|
|SysKonnect SK-9843 v2.0||n/a(0)|
|SysKonnect SK-9821 v2.0||n/a(0)|
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