Addonics SIS3124 Controller and T

[jamengual]

After a lot of time doing some stuff here are the results on the sis
controller and a interna supermicro controller I don't know why the internal
supermicro controller is so fast.

Here are the results:

The following results are from testing from the drives connected via port
multiplier to the RAID DSA3GPX8-4E controller. Note ada0, ada1, ada2, ada3
and ada4 did not have the SATA2 jumpers, while the rest of the drives did.

[root at superstorage ~]# ./read_disk_cache_speed /dev/ada0 65536 10000
10009639 us, 114.472891 MB/s
[root at superstorage ~]# ./read_disk_cache_speed /dev/ada1 65536 10000
5713195 us, 114.709895 MB/s
[root at superstorage ~]# ./read_disk_cache_speed /dev/ada2 65536 10000
5702896 us, 114.917053 MB/s
[root at superstorage ~]# ./read_disk_cache_speed /dev/ada3 65536 10000
5719617 us, 114.581099 MB/s
[root at superstorage ~]# ./read_disk_cache_speed /dev/ada4 65536 10000
5720035 us, 114.572726 MB/s
[root at superstorage ~]# ./read_disk_cache_speed /dev/ada5 65536 10000
3435868 us, 190.740739 MB/s
[root at superstorage ~]# ./read_disk_cache_speed /dev/ada6 65536 10000
3593060 us, 182.396064 MB/s
[root at superstorage ~]# ./read_disk_cache_speed /dev/ada7 65536 10000
3490376 us, 187.762006 MB/s
[root at superstorage ~]# ./read_disk_cache_speed /dev/ada8 65536 10000
3491744 us, 187.688445 MB/s
[root at superstorage ~]# ./read_disk_cache_speed /dev/ada9 65536 10000
3491041 us, 187.726240 MB/s

Direct connection from the drive to the card yielded the same results as
above.

====================================================================

These results were from the SuperMicro SMC AOC-USAS-S8iR controller. With
read cache disabled, the speed is 7.89 MB/s while read cache enabled allows
speeds at around 600MB/s

root at superstorage ~]# arcconf setcache 1 logicaldrive 1  roff
Controllers found: 1

Command completed successfully.
[root at superstorage ~]# ./read_disk_cache_speed /dev/aacd1 65536 10000
83328224 us, 7.864802 MB/s

[root at superstorage ~]# arcconf setcache 1 logicaldrive 1  ron
Controllers found: 1

Command completed successfully.
[root at superstorage ~]# ./read_disk_cache_speed /dev/aacd1 65536 10000
1107666 us, 591.658496 MB/s
[root at superstorage ~]# ./read_disk_cache_speed /dev/aacd1 65536 10000
1048647 us, 624.957684 MB/s
[root at superstorage ~]# ./read_disk_cache_speed /dev/aacd1 65536 10000
1048619 us, 624.974371 MB/s

I'm suspecting that the supermicro controller has a bigger cache memory
therefore the performance increase.

I need to thank Sum my "helper" on getting this testing done for me.

Thanks.

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