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| 02:00.10 | arrrghhh | jonpry, did you see glemsom made a .39 autobuild? |
| 02:00.16 | arrrghhh | just for fun evidently, the sick bastard. |
| 02:05.08 | arrrghhh | but his poop has build logs, commits... all that fancy stuff already. |
| 02:21.06 | jonpry | oO |
| 02:21.45 | jonpry | very nice |
| 02:23.12 | arrrghhh | hopefully wistilt2 isn't PO'd :P |
| 02:23.23 | arrrghhh | i'm hoping he'll just be happy that he doesn't have to do that crap lol |
| 02:23.45 | arrrghhh | but, here she lies |
| 02:23.46 | arrrghhh | http://glemsom.users.anapnea.net/android2/htc-msm-linux-2.6.39/ |
| 02:26.35 | jonpry | no votes! |
| 02:27.31 | jonpry | is it wrong that the first vote is fmbm? |
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| 02:43.11 | arrrghhh | meh |
| 02:43.13 | arrrghhh | do it |
| 02:43.19 | arrrghhh | i don't think anyone has the link :P |
| 02:50.00 | jonpry | somehow writing to a ext4 file is faster than writing to the raw device |
| 02:54.18 | arrrghhh | lol |
| 02:54.42 | arrrghhh | g2g.... |
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| 03:56.01 | jonpry | hi Detule |
| 03:56.59 | Detule | hey jonpry |
| 03:57.25 | Detule | oh ext4 |
| 03:57.27 | jonpry | i've been doing some strange experiments |
| 03:58.05 | jonpry | i have a laptop with a pci mmc controller so i figure as long as we are doing synthetic benchmarks, i can mess with that |
| 03:58.24 | Detule | sure |
| 03:59.15 | jonpry | so dd of data to the mmcblk is like 4.7MB on my setup |
| 03:59.22 | jonpry | read is like 10.6 |
| 03:59.30 | jonpry | er 4.7MB/sec |
| 03:59.44 | Detule | with what fs |
| 03:59.52 | jonpry | no fs |
| 04:00.00 | Detule | k |
| 04:00.14 | jonpry | 4.6MB with vfat |
| 04:01.17 | jonpry | somehow ext4 says 6.5 but i think that is not possible |
| 04:01.42 | Detule | is it syncing |
| 04:01.53 | jonpry | conv=fsync |
| 04:02.29 | Detule | i would try it with time dd if= of= && time sync see if that gives you anything different |
| 04:02.44 | Detule | not sure about that conv flag |
| 04:03.03 | jonpry | without conv is comes out to 1.1GB/sec so something is happening |
| 04:03.04 | Detule | while it seems to have made a difference on the loop device i have mixed feelings about it on the partition setup |
| 04:03.08 | Detule | oh |
| 04:03.26 | jonpry | 4.5MB on ext2 |
| 04:04.56 | jonpry | <PROTECTED> |
| 04:05.37 | jonpry | so when there is lots of free space and low fragmentation, a write to a file is pretty much just a write to the raw device |
| 04:06.07 | Detule | that still wouldn't explain 6.5 |
| 04:06.17 | jonpry | no it wouldn't |
| 04:06.56 | Detule | i was thinking about trying out btrfs |
| 04:06.56 | jonpry | so maybe the key is mondo partitions |
| 04:07.26 | jonpry | me too |
| 04:08.17 | Detule | supposedly it has that ssd optimized flag |
| 04:08.23 | jonpry | i think we are kind of screwed with this benchmark |
| 04:08.55 | jonpry | linux won't mount any vfat partitions with big sectors |
| 04:09.18 | Detule | bummer |
| 04:09.34 | Detule | i like what i saw here http://www.blah-blah.ch/Mra/Nilfs2performance |
| 04:09.56 | Detule | but for every writeup i see claiming one fs is better i find another one claiming something completely else |
| 04:10.19 | Detule | i wonder if these controllers they put in sd cards vary vastly from one manufacturer to another |
| 04:10.56 | jonpry | pretty sure they do |
| 04:12.19 | Detule | then probably there is no one solution that works best/would make a difference across the board |
| 04:12.23 | Detule | all this is pretty academic |
| 04:13.22 | jonpry | somehow ext4 is still faster than the raw write. && sync doesn't show much difference |
| 04:13.58 | Detule | what you passing for bs and count in dd |
| 04:15.04 | Detule | if that article is any indication, ext4 should lag in writing a large quantity of small files |
| 04:15.04 | jonpry | changing bs has no effect on anything. i was hoping it would |
| 04:15.19 | jonpry | ouch, nilfs2 3.5mb/sec |
| 04:16.17 | jonpry | using bs=4k count=16k |
| 04:17.23 | jonpry | most of the slowness in sd is similar to hdd. so i figure anything that can be done might already be |
| 04:18.45 | Detule | that's pretty bad |
| 04:18.55 | Detule | at least compared to those other numbers you are seeing |
| 04:19.14 | Detule | i wish the busybox dd reported transfer speed |
| 04:19.48 | jonpry | chroot :) |
| 04:20.05 | Detule | cross compiling unix-utils might be simpler for me |
| 04:20.06 | Detule | :) |
| 04:21.41 | Detule | well last night i tested with a 50mb folder and a 500mb folder of small files, in both cases the nilfs2 slowest time was significantly better than the ext2 fastest time |
| 04:22.35 | jonpry | btrfs is about the same as ext4, with its ftl drive |
| 04:22.46 | Detule | though, that was with the daemon turned off, i should run those numbers again with the service on, though with 200mb between the min_clean and max_clean value i hope not to see it engaging more than once every few days |
| 04:23.43 | Detule | that too better than the raw write values |
| 04:24.22 | jonpry | yeah |
| 04:26.53 | Detule | well damn, maybe ext4 is worth giving a closer look too |
| 04:30.06 | Detule | http://www.phoronix.com/scan.php?page=article&item=linux_3_filesystems&num=1 |
| 04:31.54 | jonpry | i'm not sure those are terribly relevant to sd |
| 04:34.30 | jonpry | at some point its asking how fast is the fs code on this machine with massive ram caches |
| 04:35.14 | jonpry | or how lucky was the fs to have allocated all these blocks in places where seek times were low |
| 04:40.52 | Detule | getting debootstrap |
| 04:41.46 | jonpry | for btrfs? |
| 04:42.10 | Detule | chroot |
| 04:42.23 | jonpry | i'd kind of like to make a build with good integration of android and chroot |
| 04:43.15 | Detule | not going to lie |
| 04:43.50 | Detule | 6 months ago i would never have dreamt about running linux natively on the phone |
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| 04:44.13 | Detule | that's pretty cool |
| 04:44.34 | jonpry | rhobuntu has been around for a bit |
| 04:45.50 | Detule | alright i am out i'll play around with this some more tomorrow good night |
| 04:46.01 | jonpry | k, gnight |
| 04:49.00 | jonpry | kernel tree copy results: ext4 3:06, btrfs 2:46,5:11 nilfs2 |
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| 06:42.16 | jonpry | looks like it will require btrfs tools to even be able to mount the filesystems |
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