Card benchmark - what's the optimal write buffer size?

[KMA_WWC]

Just finished the 5h+ test (until full charged battery died). I used Hoodman Steel 1000x 64gb card. Writing speed 95% of the time was over 100mb/s. It dropped under 100mb/s only when the screen went to sleep, but when I got it back, speed returned back to over 100mb/s. Not sure why it happened.

Here are the file/results:
https://www.dropbox.com/s/qr3kpxh3xtleukl/BENCH.LOG

Please do let me know if that helps or if you need any other tests. I would love to help as much as I can.

[a1ex]

Wow, it overlaps perfectly with the other Lexar from Jason Montalvo.

[KMA_WWC]

Wow, it overlaps perfectly with the other Lexar from Jason Montalvo.

Glad to hear that I will be getting 4 more 64gb Hoodman cards pretty soon. I can test those to see if there is any significant difference in writing speed between same cards. I know for sure that hoodman quality control/check is top notch, so I expect them to have relatively same speed with not much difference.

The only issue I see is that I still can't record continues 1920x1280 even though card tops out up to 116mb/s writing speed, and 1920x1280 requires only 98mb/s. I think it's comes more to firmware tweaking and getting max out of it or as much as possible. Basically, optimization.

[a1ex]

CF shootout:


SD shootout:


I've only used the log files created outside LiveView, so the results should be comparable.

[Jackie]

About an hour long test Sandisk Extreme 32GB CF + 5D3

Code: [Select]

Random buffer size experiment
ML v2.3.NEXT.2013May18.5D3113, 425a8abeb7ef+ (unified) tip
Mode: movie 1920x1080 25p, Global Draw: OFF
CF SanDisk SanDisk SDCFX-032G                     
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[Yomommassis]

nice to see the information out on the chart
im noticing that my two transcend benchmarks have a difference of about 10MB/s but by doing the partition alignment

Ill go ahead and rerun the benchmarks with different alignments to see how the results vary

[Yomommassis]

So I'm finding that the 5D Mark 2 and 5D Mark 3 with the built in formatting will format CF cards to FAT32 with an offset of 31K and I believe an allocation of 16K

31K of course making the CF card not aligned..aligning the partition with an offset of 32K with an allocation of 16K appears to be giving me a ~10MB/s read speed increase but a ~10MB/s write decrease

FAT32 seems to be easier for me to troubleshoot myself seeing as there are way less options
I'll keep messing with it

550D
SanDiskExtreme 32GB 45MB/s - exFAT 1024 Offset - 64k Alloc - 1 hour
http://pastebin.com/Dj7KjrfU

5D Mark 3
KomputerBay 32GB 1000x - exFAT 1024 Offset - 64K Alloc - 1 hour
http://pastebin.com/whfv5k2v

with these tests I was reading a forum that was saying a 1024 offset was a good start point and a 64K allocation would give performance increases, curious as to how these benchmarks compare to my last benchmark

[JackDaniel412]

5D2 - SanDisk Extreme Pro 16GB 90 MB/s.

Code: [Select]

Buffer size experiment
ML v2.3.NEXT.2013May17.5D2212, 33e2dcdef271 (unified) tip
Mode: movie 1920x1080 24p, Global Draw: OFF
10312704 569
15885312 572
80896 123
8949760 463
28661760 585
16264192 573
24521728 580
16424960 521
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13968384 570
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27503616 580
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28731392 538
2458624 470


[1%]

What if you align to 4096.

[Yomommassis]

What if you align to 4096.

Yeeeeah I'll do that and then fall asleep

[Vegandelight]

I wonder if the person submitting 64gb komputerbay had it in lv-mode or just playback.

cause LV Photo maxes out at around 98mb/s
playback mode 121mb/s

A1ex what mode are we suppose to try in? so people are clear on that.

[a1ex]

You can check from logs. I've selected only the tests that were ran outside LiveView.

[Mayo]

6D Transcend Ultimate 64GB 90MBs  (exFAT 4096)

Code: [Select]

Buffer size experiment
ML v2.3.NEXT.2013May18.6D113, 25d36d43a82c (unified) tip
Mode: playback, Global Draw: OFF
10312704 249
15885312 288
80896 82
8949760 302
28661760 304
16264192 299
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16424960 300
13148160 300
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21841920 300
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27988992 310
20073472 298
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30233600 310
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2406400 288
28059648 308
2145280 270
27503616 303


[Colemar]

for the graph a1ex: http://pastebin.com/974H86ey -- 2+hrs on 5DmkIII Delkin Devices 64GB 1000x UDMA7 CompactFlash card

[xaled]

Buffer size experiment
ML v2.3.NEXT.2013May19.600D102, 69ecc405167a tip
Mode: idk, Global Draw: ON
10312704 212
15885312 214
80896 104
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28661760 215
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13148160 214
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41984 70
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[Jackie]

Some more data from me still using 5D3 + Sandisk Extreme 32GB

Code: [Select]

Random buffer size experiment
ML v2.3.NEXT.2013May18.5D3113, 425a8abeb7ef+ (unified) tip
Mode: playback, Global Draw: ON
CF SanDisk SanDisk SDCFX-032G                     
19658678 605
18380800 650
17340928 586
23952298 616
21052573 590
20265691 629
18969258 566
19429444 617
22568362 596
20948187 643
17175491 647
16087461 645
23347456 604
24939613 567
18817297 611
18395204 584
18984413 615
19555805 621
21178368 650
19641480 582
20759000 649
20418706 607
18059605 602
21330707 504
18270958 650
17141696 610
19293320 587
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18394658 631
24481450 576
21150798 579
23969706 586
19360841 613
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17413481 613
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20650934 645
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16797824 645
19026875 621
17474048 625
17203264 653
14795398 606
21735660 618
21743852 552
19922797 647
18626013 594
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22444740 638
20778062 578
17028096 616
19742993 558
18191291 618
19221913 610
20663374 599
18904200 616
20999010 565
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21149459 613
17845632 647
19305198 579
21612307 609
19029742 560
23326720 648
18633386 640
14747540 630
25976087 646
18128622 632
19395072 610
20776960 594
17463424 642
18005879 618
21166552 575
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16282864 612
15077432 577
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20769161 617
24568273 587
21910449 602
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21254582 585
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20131620 579
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20451766 628
18724454 585
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22495783 622
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20046921 569
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22243091 616
15968918 610
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15818482 606
23411456 611
21061266 521
19677622 626
22889898 621
19544576 584
21162614 648
23141802 623
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18915259 579
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20713984 617
20790665 573
18624238 617
18064861 575
21608999 604
18475076 632
18569147 611
23193856 581
22112413 651
17626944 575
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20239652 648
17803904 603
18139477 649
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20475904 619
17766208 619
19824713 650
16231303 581
19139925 624
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21314638 627
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20438381 652
21758582 573
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15306296 648
21115588 607
18152925 486
21690368 614
23190101 551
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21252315 587
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18885290 583
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17718528 627
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25004404 615
21377417 573
22925627 611
19173785 636
17936998 482
15662592 618
19498788 601
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17937681 653
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21147175 633
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19698980 650
16414900 584
21483812 623
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19573321 611
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18290112 652
18457122 569
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15119473 638
24935330 606
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14819112 584
23563946 617
20734829 580
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19712614 621
20437577 603
19392989 626
20168265 592
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18708821 601
21627746 587
24138837 626
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18577339 612
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19533165 614
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19999963 612
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18736832 585
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23348053 650
17940548 564
16791104 616
16659215 555
22553941 644
15092035 596
20633600 609
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17952358 495
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22183384 555
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22975409 606
16925876 627
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17964800 561
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18213751 572
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21306761 655
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21213105 598
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[squig]

Just got the Toshiba 1066x 64Gb card.  Here's the real world sustained test results with the 18/5 build. I got bored shooting my foot after 9Gb.

1928x1180 24p @ 90MB/s
1440x672 48p @ 77MB/s
1120x640 60p @70MB/s dropped frame @ 2300 frames.

I'll run the new benchmark test this arvo.

[Yomommassis]

Wanted to see how differently cards performed on different cameras
The cards were setup to have default formatting
by default I mean I took the card, formatted it in the camera, loaded magic lantern onto the card, and then ran the benchmark..no tricks


5D Mark 2 - Komputer Bay 64 GB 1000x - DEFAULT - +1Hour
http://pastebin.com/bSHZnmC8

5D Mark 3 - Amazon Basics 32 GB Class 10 - DEFAULT - +1Hour
http://pastebin.com/k1pmqURu

550D Amazon Basics 32 GB Class 10 - DEFAULT - +1Hour
http://pastebin.com/90D0rbFD

For some reason it seemed like the 5D Mark 3 was having slower speeds with the SD vs the 550D

[jos_tm]

I have tested the Toshiba 1066x 32 GB card with the build 19th.may on the Mark III. This is the log of the buffer size benchmark:

Buffer size experiment
ML v2.3.NEXT.2013May19.5D3113,
Mode: movie 1920x1080 25p, Global Draw: OFF
CF TOSHIBA THNCF TOSHIBA THNCF032GS                     
10312704 927
15885312 946
80896 249
8949760 935
28661760 945
16264192 955
24521728 937
16424960 945
13148160 930
15619072 954
1658880 814
21001216 938
8548352 938
19760128 944
5965824 920
24906752 934
13968384 930
16770048 928
4542464 905
13063168 932
33263616 963
30312448 942
16713728 956
3887104 886
21841920 961
12846080 927
16192512 927
3333120 875
6719488 912
17313792 889
23374848 866
2865152 785

[bronson]

Tested with 5d mark2 (19th may) build
CF : Transcend 32GB 1000x  (30mn)

https://docs.google.com/file/d/0Bzajleby_hYZSm9reXN4QmZtSlU/edit?usp=sharing

Formated with fat32format with 64K Cluster size
http://www.ridgecrop.demon.co.uk/index.htm?fat32format.htm

[squig]

Toshiba 1066x 64Gb ex-fat

http://pastebin.com/qAzt8kh3

[mauerfuchs]

Toshiba 1066x 64Gb ex-fat

http://pastebin.com/qAzt8kh3

Why is yours so fast? Because you're in playback mode?
Mine only makes between 82-95

[Kabuto1138]

Mauer

Why is yours so fast? Because you're in playback mode?
Mine only makes between 82-95

They mauerfuchs, are you also using the 64gb?

[mauerfuchs]

Mauer
They mauerfuchs, are you also using the 64gb?

Yes i do. Mine came in FAT32 and i tryed to format it exFAT on MAC and PC. It didn't made it faster anyway...
http://www.magiclantern.fm/forum/index.php?topic=5513.0

There is one thing i still don't understand about the write buffer thing...is it possible to define the write buffersize somewhere in Magic Lantern? How and where?

[AndreasK]

How are you running the benchmark?

In photomode i get ~15mb/sec more then in videomode (that opens in liveview)...