[Flashbench] Corsair Voyager 3.0 16GB
Michael Monnerie
michael.monnerie at is.it-management.at
Thu Jun 2 09:00:00 UTC 2011
On Dienstag, 31. Mai 2011 Arnd Bergmann wrote:
> Try larger values for --open-au-nr=X. You are on the right track, the
> erasesize is obviously 8 MB, and the number of open AUs is most
> likely more than 6.
>
> For both linear and --random, you can pass --open-au-nr=32 just for
> fun, to see what happens (the performance should be horrible, no
> need to let it run to the end in that case), then start with smaller
> values (8, 12, 16, 20) to see where the cutoff is. Find the largest
> fast one and the smallest slow one for linear and random modes.
>
> With the --open-au tests, just use --blocksize=512 as a start. The
> number only defines when the test stops.
I thought that already with "--open-au-nr=5 --erasesize=$[8 * 1024 * 1024] /dev/sdd --random"
it was slow. What is your definition of slow? For me, the first test that
goes below 20MB/s would have been slow, so "--open-au-nr=5 --erasesize=$[8 * 1024 * 1024] /dev/sdd --blocksize=$[256 * 1024]"
But you seem to mean something else.
Here some results.
# ./flashbench --open-au --open-au-nr=7 --erasesize=$[8 * 1024 * 1024] /dev/sdd --blocksize=$[256 * 1024]
8MiB 21.5M/s
4MiB 13.8M/s
2MiB 11.6M/s
1MiB 10.8M/s
512KiB 10.4M/s
256KiB 10M/s
# ./flashbench --open-au --open-au-nr=8 --erasesize=$[8 * 1024 * 1024] /dev/sdd --blocksize=$[256 * 1024]
8MiB 21.4M/s
4MiB 13M/s
2MiB 10.8M/s
1MiB 9.93M/s
512KiB 9.49M/s
256KiB 7.17M/s
# ./flashbench --open-au --open-au-nr=10 --erasesize=$[8 * 1024 * 1024] /dev/sdd --blocksize=$[256 * 1024]
8MiB 21.3M/s
4MiB 11.9M/s
2MiB 9.75M/s
1MiB 8.03M/s
512KiB 5.6M/s
256KiB 5.14M/s
# ./flashbench --open-au --open-au-nr=12 --erasesize=$[8 * 1024 * 1024] /dev/sdd --blocksize=$[256 * 1024]
8MiB 21.2M/s
4MiB 11.4M/s
2MiB 9.2M/s
1MiB 4.98M/s
512KiB 4.84M/s
256KiB 7.79M/s
Results with small Blocksize. Run by a script which outputs the start time of the test, so you can see how
long it was running.
Unforunately, I only saw that I used "8*512*1024" for the erasesize, which is 4MB
instead of the wanted 8MB. Does that matter?
@12:03:52 # ./flashbench --open-au --open-au-nr=1 --erasesize=$[8 * 512 * 1024] /dev/sdd --blocksize=512
4MiB 22M/s
2MiB 5.99M/s
1MiB 21.2M/s
512KiB 5.98M/s
256KiB 20.9M/s
128KiB 5.92M/s
64KiB 21.2M/s
32KiB 5.99M/s
16KiB 18.3M/s
8KiB 4.79M/s
4KiB 6.97M/s
2KiB 3.96M/s
1KiB 2.03M/s
512B 1.03M/s
@12:04:05 # ./flashbench --open-au --open-au-nr=2 --erasesize=$[8 * 512 * 1024] /dev/sdd --blocksize=512
4MiB 21.9M/s
2MiB 5.91M/s
1MiB 21.7M/s
512KiB 5.87M/s
256KiB 20.9M/s
128KiB 5.71M/s
64KiB 18.2M/s
32KiB 5.13M/s
16KiB 9.5M/s
8KiB 2.04M/s
4KiB 863K/s
2KiB 502K/s
1KiB 244K/s
512B 125K/s
@12:06:26 # ./flashbench --open-au --open-au-nr=3 --erasesize=$[8 * 512 * 1024] /dev/sdd --blocksize=512
4MiB 8.22M/s
2MiB 5.84M/s
1MiB 21.6M/s
512KiB 5.84M/s
256KiB 20.8M/s
128KiB 5.68M/s
64KiB 18.2M/s
32KiB 5.09M/s
16KiB 9.5M/s
8KiB 1.61M/s
4KiB 636K/s
2KiB 359K/s
1KiB 188K/s
512B 91.5K/s
@12:11:07 # ./flashbench --open-au --open-au-nr=4 --erasesize=$[8 * 512 * 1024] /dev/sdd --blocksize=512
4MiB 13.1M/s
2MiB 7.14M/s
1MiB 9.19M/s
512KiB 9.13M/s
256KiB 9.03M/s
128KiB 8.79M/s
64KiB 8.37M/s
32KiB 7.62M/s
16KiB 3.17M/s
8KiB 1.08M/s
4KiB 620K/s
2KiB 301K/s
1KiB 151K/s
512B 76K/s
@12:18:38 # ./flashbench --open-au --open-au-nr=5 --erasesize=$[8 * 512 * 1024] /dev/sdd --blocksize=512
4MiB 10.5M/s
2MiB 8.24M/s
1MiB 5.8M/s
512KiB 7.85M/s
256KiB 8.09M/s
128KiB 6.26M/s
64KiB 6.02M/s
32KiB 8.47M/s
16KiB 3.34M/s
8KiB 1.04M/s
4KiB 481K/s
2KiB 246K/s
1KiB 123K/s
512B 62.1K/s
@12:30:05 # ./flashbench --open-au --open-au-nr=6 --erasesize=$[8 * 512 * 1024] /dev/sdd --blocksize=512
4MiB 9.32M/s
2MiB 7.18M/s
1MiB 5.57M/s
512KiB 4.93M/s
256KiB 5.94M/s
128KiB 6.55M/s
64KiB 5.05M/s
32KiB 2.11M/s
16KiB 2.74M/s
8KiB 887K/s
4KiB 421K/s
2KiB 204K/s
1KiB 102K/s
512B 51.7K/s
@12:46:41 # ./flashbench --open-au --open-au-nr=8 --erasesize=$[8 * 512 * 1024] /dev/sdd --blocksize=512
4MiB 8.12M/s
2MiB 6.15M/s
1MiB 5.36M/s
512KiB 4.35M/s
256KiB 3.95M/s
128KiB 2.97M/s
64KiB 4.2M/s
32KiB 3M/s
16KiB 1.99M/s
8KiB 649K/s
4KiB 326K/s
2KiB 167K/s
1KiB 83.9K/s
512B 42K/s
@13:13:55 # ./flashbench --open-au --open-au-nr=10 --erasesize=$[8 * 512 * 1024] /dev/sdd --blocksize=512
4MiB 7.57M/s
2MiB 5.69M/s
1MiB 5.24M/s
512KiB 5.03M/s
256KiB 3.12M/s
128KiB 4.31M/s
64KiB 4.43M/s
32KiB 2.04M/s
16KiB 1.3M/s
8KiB 553K/s
4KiB 265K/s
2KiB 131K/s
1KiB 65.4K/s
512B 33K/s
@13:56:57 # ./flashbench --open-au --open-au-nr=12 --erasesize=$[8 * 512 * 1024] /dev/sdd --blocksize=512
4MiB 7.37M/s
2MiB 5.52M/s
1MiB 4.64M/s
512KiB 4.33M/s
256KiB 2.33M/s
128KiB 3.76M/s
64KiB 2.02M/s
32KiB 1.63M/s
16KiB 892K/s
8KiB 433K/s
4KiB 156K/s
2KiB 69.7K/s
1KiB 44.5K/s
512B 19.6K/s
@15:21:05 # ./flashbench --open-au --open-au-nr=16 --erasesize=$[8 * 512 * 1024] /dev/sdd --blocksize=512
4MiB 6.9M/s
2MiB 5.14M/s
1MiB 4.65M/s
512KiB 1.63M/s
256KiB 4.06M/s
128KiB 1.73M/s
64KiB 1.64M/s
32KiB 1.02M/s
16KiB 471K/s
8KiB 238K/s
4KiB 111K/s
2KiB 57.4K/s
1KiB 28.6K/s
512B 14.4K/s
@17:58:45 # ./flashbench --open-au --open-au-nr=20 --erasesize=$[8 * 512 * 1024] /dev/sdd --blocksize=512
4MiB 4.54M/s
2MiB 4.98M/s
1MiB 1.21M/s
512KiB 947K/s
256KiB 491K/s
128KiB 285K/s
64KiB 109K/s
32KiB 73.6K/s
16KiB 29.9K/s
8KiB 13.5K/s
4KiB 6.77K/s
2KiB 3.4K/s
Terminated (was running from 1800 overnight until 1042, so I killed it)
@10:42:10 # ./flashbench --open-au --open-au-nr=24 --erasesize=$[8 * 512 * 1024] /dev/sdd --blocksize=512
4MiB 5.96M/s
2MiB 3.83M/s
1MiB 1.13M/s
512KiB 614K/s
Terminated
@10:50:35 # ./flashbench --open-au --open-au-nr=32 --erasesize=$[8 * 512 * 1024] /dev/sdd --blocksize=512
4MiB 5.53M/s
2MiB 3.41M/s
1MiB 1.11M/s
Terminated
Now the tests with "--random" and correct 8MB erasesize:
@10:58:54 # ./flashbench --open-au --open-au-nr=1 --erasesize=$[8 * 1024 * 1024] /dev/sdd --blocksize=512 --random
8MiB 7.11M/s
4MiB 21.9M/s
2MiB 13.2M/s
1MiB 8.37M/s
512KiB 7.02M/s
256KiB 6.48M/s
128KiB 6.15M/s
64KiB 5.86M/s
32KiB 5.45M/s
16KiB 4.1M/s
8KiB 1.75M/s
4KiB 1.22M/s
2KiB 512K/s
1KiB 266K/s
512B 136K/s
@11:01:07 # ./flashbench --open-au --open-au-nr=2 --erasesize=$[8 * 1024 * 1024] /dev/sdd --blocksize=512 --random
8MiB 22.6M/s
4MiB 13.6M/s
2MiB 9.66M/s
1MiB 7.53M/s
512KiB 6.75M/s
256KiB 6.38M/s
128KiB 6.13M/s
64KiB 5.69M/s
32KiB 5.38M/s
16KiB 3.17M/s
8KiB 1.95M/s
4KiB 894K/s
2KiB 462K/s
1KiB 232K/s
512B 116K/s
@11:06:14 # ./flashbench --open-au --open-au-nr=3 --erasesize=$[8 * 1024 * 1024] /dev/sdd --blocksize=512 --random
8MiB 22.1M/s
4MiB 9.89M/s
2MiB 6.99M/s
1MiB 5.7M/s
512KiB 5.16M/s
256KiB 4.79M/s
128KiB 4.72M/s
64KiB 4.54M/s
32KiB 3.21M/s
16KiB 2.55M/s
8KiB 1.63M/s
4KiB 693K/s
2KiB 354K/s
1KiB 177K/s
512B 90.2K/s
@11:16:09 # ./flashbench --open-au --open-au-nr=4 --erasesize=$[8 * 1024 * 1024] /dev/sdd --blocksize=512 --random
8MiB 22M/s
4MiB 9.25M/s
2MiB 6.69M/s
1MiB 5.59M/s
512KiB 3.5M/s
256KiB 4.91M/s
128KiB 4.77M/s
64KiB 4.57M/s
32KiB 3.08M/s
16KiB 2.27M/s
8KiB 1.37M/s
4KiB 573K/s
2KiB 295K/s
1KiB 150K/s
512B 74.9K/s
@11:31:51 # ./flashbench --open-au --open-au-nr=5 --erasesize=$[8 * 1024 * 1024] /dev/sdd --blocksize=512 --random
8MiB 22.4M/s
4MiB 10.9M/s
2MiB 8.28M/s
1MiB 7.07M/s
512KiB 6.42M/s
256KiB 6.32M/s
128KiB 6.02M/s
64KiB 5.86M/s
32KiB 3.54M/s
16KiB 1.93M/s
8KiB 1.07M/s
4KiB 490K/s
2KiB 242K/s
1KiB 124K/s
512B 61.2K/s
@11:55:11 # ./flashbench --open-au --open-au-nr=6 --erasesize=$[8 * 1024 * 1024] /dev/sdd --blocksize=512 --random
8MiB 16.3M/s
4MiB 9.93M/s
2MiB 7M/s
1MiB 3.9M/s
512KiB 5.13M/s
256KiB 3.46M/s
128KiB 4.58M/s
64KiB 2.85M/s
32KiB 2.82M/s
16KiB 1.8M/s
8KiB 944K/s
4KiB 399K/s
2KiB 219K/s
1KiB 103K/s
512B 51.8K/s
@12:28:27 # ./flashbench --open-au --open-au-nr=8 --erasesize=$[8 * 1024 * 1024] /dev/sdd --blocksize=512 --random
8MiB 22.3M/s
4MiB 11.3M/s
2MiB 8.45M/s
1MiB 6.88M/s
512KiB 4.15M/s
256KiB 6.31M/s
128KiB 5.54M/s
64KiB 3.83M/s
32KiB 2.54M/s
16KiB 1.46M/s
8KiB 714K/s
4KiB 344K/s
2KiB 167K/s
1KiB 86.2K/s
512B 42.4K/s
@13:21:57 # ./flashbench --open-au --open-au-nr=10 --erasesize=$[8 * 1024 * 1024] /dev/sdd --blocksize=512 --random
8MiB 22M/s
4MiB 10.8M/s
2MiB 7.43M/s
1MiB 6.82M/s
512KiB 5.23M/s
256KiB 3.92M/s
128KiB 3.85M/s
64KiB 2.6M/s
32KiB 1.64M/s
16KiB 1.17M/s
8KiB 568K/s
4KiB 266K/s
2KiB 136K/s
1KiB 66.1K/s
512B 33.4K/s
@14:47:08 # ./flashbench --open-au --open-au-nr=12 --erasesize=$[8 * 1024 * 1024] /dev/sdd --blocksize=512 --random
8MiB 22.2M/s
4MiB 10.6M/s
2MiB 4.1M/s
1MiB 4.48M/s
512KiB 3.27M/s
256KiB 2.95M/s
128KiB 3M/s
64KiB 2.04M/s
32KiB 1.15M/s
16KiB 685K/s
8KiB 446K/s
4KiB 193K/s
2KiB 84.5K/s
1KiB 38.6K/s
512B 20.2K/s
@17:33:20 # ./flashbench --open-au --open-au-nr=16 --erasesize=$[8 * 1024 * 1024] /dev/sdd --blocksize=512 --random
8MiB 22.2M/s
4MiB 10.4M/s
2MiB 3.28M/s
1MiB 3.02M/s
512KiB 2.94M/s
256KiB 2.34M/s
128KiB 2.48M/s
64KiB 1.07M/s
32KiB 911K/s
16KiB 397K/s
8KiB 240K/s
4KiB 115K/s
2KiB 58K/s
1KiB 29K/s
512B 14.5K/s
@22:46:38 # ./flashbench --open-au --open-au-nr=20 --erasesize=$[8 * 1024 * 1024] /dev/sdd --blocksize=512 --random
8MiB 22.2M/s
4MiB 6.6M/s
2MiB 2.46M/s
1MiB 1.14M/s
512KiB 540K/s
256KiB 362K/s
128KiB 200K/s
64KiB 103K/s
32KiB 52.9K/s
16KiB 27.2K/s
8KiB 13.7K/s
Terminated
@10:43:54 # ./flashbench --open-au --open-au-nr=24 --erasesize=$[8 * 1024 * 1024] /dev/sdd --blocksize=512 --random
8MiB 10.2M/s
4MiB 5.3M/s
2MiB 2.28M/s
1MiB 1.1M/s
Terminated
@10:52:08 # ./flashbench --open-au --open-au-nr=32 --erasesize=$[8 * 1024 * 1024] /dev/sdd --blocksize=512 --random
8MiB 13.5M/s
4MiB 5.01M/s
2MiB 2.23M/s
Terminated
What next?
--
mit freundlichen Grüssen,
Michael Monnerie, Ing. BSc
it-management Internet Services: Protéger
http://proteger.at [gesprochen: Prot-e-schee]
Tel: +43 660 / 415 6531
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