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---- Thread: OpenELEC Testbuilds for RaspberryPi Part 2 (/showthread.php?tid=184866)



RE: OpenELEC Testbuilds for RaspberryPi Part 2 - popcornmix - 2013-12-19

(2013-12-19, 19:43)xbs08 Wrote: Can this be right??

It's a bit quick. About 5MB/s is not impossible, but considering you are reading and writing the same device, and doing so with thousands of small files, that seems pretty high.

Perhaps this is fairer:
time sh -c "cp -r /storage/.xbmc/userdata/Thumbnails/* /storage/downloads/Thumbnails && sync"

The sync will ensure the files have actually been written, rather than still sitting in a cache.


RE: OpenELEC Testbuilds for RaspberryPi Part 2 - allan87 - 2013-12-19

Rebuilding a large database would probably be a good test for disk access. Lots of small reads and writes.


RE: OpenELEC Testbuilds for RaspberryPi Part 2 - xbs08 - 2013-12-19

Code:
OpenELEC:~ # time sh -c "cp -r /storage/.xbmc/userdata/Thumbnails/* /storage/downloads/Thumbnails && sync"
real    0m 38.67s
user    0m 0.20s
sys     0m 4.03s

OpenELEC:~ # time sh -c "cp -r /storage/.xbmc/userdata/Thumbnails/* /storage/downloads/Thumbnails && sync"
real    0m 36.25s
user    0m 0.20s
sys     0m 4.46s

OpenELEC:~ # time sh -c "cp -r /storage/.xbmc/userdata/Thumbnails/* /storage/downloads/Thumbnails && sync"
real    0m 38.76s
user    0m 0.23s
sys     0m 4.56s

OpenELEC:~ # du -csh /storage/.xbmc/userdata/Thumbnails
151.8M  /storage/.xbmc/userdata/Thumbnails
151.8M  total



RE: OpenELEC Testbuilds for RaspberryPi Part 2 - popcornmix - 2013-12-19

(2013-12-19, 20:03)xbs08 Wrote: OpenELEC:~ # time sh -c "cp -r /storage/.xbmc/userdata/Thumbnails/* /storage/downloads/Thumbnails && sync"
real 0m 38.67s
user 0m 0.20s
sys 0m 4.03s

I get similar (high) results:

Code:
OpenELEC:~ # du -csh /storage/.xbmc/userdata/Thumbnails
416.2M  /storage/.xbmc/userdata/Thumbnails
416.2M  total
OpenELEC:~ # time sh -c "cp -r /storage/.xbmc/userdata/Thumbnails/* /storage/downloads/Thumbnails && sync"
real    0m 49.86s
user    0m 0.41s
sys     0m 8.89s

This is with f2fs my fast Sandisk Extreme USB flash drive.


RE: OpenELEC Testbuilds for RaspberryPi Part 2 - allan87 - 2013-12-19

Do we have baseline results with ext4 for comparison?


RE: OpenELEC Testbuilds for RaspberryPi Part 2 - xbs08 - 2013-12-19

With Patriot USB 3.0 F2FS

Code:
OpenELEC:~ # time sh -c "cp -r /storage/.xbmc/userdata/Thumbnails/* /storage/downloads/Thumbnails && sync"
real    0m 27.92s
user    0m 0.19s
sys     0m 3.71s
OpenELEC:~ # time rm -rf /storage/downloads/Thumbnails
real    0m 0.41s
user    0m 0.04s
sys     0m 0.28s



RE: OpenELEC Testbuilds for RaspberryPi Part 2 - popcornmix - 2013-12-19

(2013-12-19, 21:22)allan87 Wrote: Do we have baseline results with ext4 for comparison?

That's what we need. Should have made two partition on USB drive - one f2fs and one ext4 which would have made this easier.


RE: OpenELEC Testbuilds for RaspberryPi Part 2 - xbs08 - 2013-12-19

I'll try doing some EXT4 test asap.


RE: OpenELEC Testbuilds for RaspberryPi Part 2 - xbs08 - 2013-12-19

Silicon -power USB 2.0 4GB - EXT4 vs. F2FS

EXT4
Code:
OpenELEC:~ # time sh -c "cp -r /storage/.xbmc/userdata/Thumbnails/* /storage/downloads/Thumbnails && sync"
real    5m 46.35s
user    0m 0.19s
sys     0m 5.80s

OpenELEC:~ # time sh -c "cp -r /storage/.xbmc/userdata/Thumbnails/* /storage/downloads/Thumbnails && sync"
real    2m 19.73s
user    0m 0.18s
sys     0m 5.70s

OpenELEC:~ # time sh -c "cp -r /storage/.xbmc/userdata/Thumbnails/* /storage/downloads/Thumbnails && sync"
real    4m 40.97s
user    0m 0.21s
sys     0m 5.92s

F2FS
(2013-12-19, 20:03)xbs08 Wrote:
Code:
OpenELEC:~ # time sh -c "cp -r /storage/.xbmc/userdata/Thumbnails/* /storage/downloads/Thumbnails && sync"
real    0m 38.67s
user    0m 0.20s
sys     0m 4.03s

OpenELEC:~ # time sh -c "cp -r /storage/.xbmc/userdata/Thumbnails/* /storage/downloads/Thumbnails && sync"
real    0m 36.25s
user    0m 0.20s
sys     0m 4.46s

OpenELEC:~ # time sh -c "cp -r /storage/.xbmc/userdata/Thumbnails/* /storage/downloads/Thumbnails && sync"
real    0m 38.76s
user    0m 0.23s
sys     0m 4.56s

OpenELEC:~ # du -csh /storage/.xbmc/userdata/Thumbnails
151.8M  /storage/.xbmc/userdata/Thumbnails
151.8M  total

Silicon -power USB 2.0 EXT4 format performs better in library (worse in general UI tasks) in relation to Patriot USB 3.0 but with F2FS format Patriot performs better in library and UI.


RE: OpenELEC Testbuilds for RaspberryPi Part 2 - vbaros - 2013-12-19

That is amazing. I also have Patriot 3.0 16GB and I'm eager to switch to F2FS. Is it enough to format and rsync the contents of the Storage partition?


RE: OpenELEC Testbuilds for RaspberryPi Part 2 - xbs08 - 2013-12-19

I made a backup of .xbmc, format to F2FS, restored .xbmc and reboot.
You'll need GParted 0.16 or up to format to F2FS.

BTW copying .xbmc folder to EXT4 took a lot longer than it did to F2FS Wink

F2FS - Patriot USB 3.0 16 GB - 151MB Thumbnails
Code:
OpenELEC:~ # time sh -c "cp -r /storage/.xbmc/userdata/Thumbnails/* /storage/downloads/Thumbnails && sync"
real    0m 27.48s
user    0m 0.21s
sys     0m 4.01s

OpenELEC:~ # time sh -c "cp -r /storage/.xbmc/userdata/Thumbnails/* /storage/downloads/Thumbnails && sync"
real    0m 27.49s
user    0m 0.16s
sys     0m 4.01s

OpenELEC:~ # time sh -c "cp -r /storage/.xbmc/userdata/Thumbnails/* /storage/downloads/Thumbnails && sync"
real    0m 27.84s
user    0m 0.21s
sys     0m 3.96s

If you can, please do the same tests so we can compare results.
Thanks.


RE: OpenELEC Testbuilds for RaspberryPi Part 2 - Reddog999 - 2013-12-20

(2013-12-19, 21:14)popcornmix Wrote:
(2013-12-19, 20:03)xbs08 Wrote: OpenELEC:~ # time sh -c "cp -r /storage/.xbmc/userdata/Thumbnails/* /storage/downloads/Thumbnails && sync"
real 0m 38.67s
user 0m 0.20s
sys 0m 4.03s

I get similar (high) results:

I guess I must have a really slow usb stick. However, I cannot repeat the 9 minutes odd with ext4 storage - the only thing I can think of for the discrepancy is that I've been working with image files for each of the ext4 and f2fs storage (which also explains the difference in thumbnail files sizes since there were 2 days between me making the images) and it might have got corrupted when I re-imaged the usb stick or there might have been something running in the background (not sure what though).

Anyway re-did the tests (deleting the /downloads/thumbnails folder between each test):

3 tests with ext4 (4GB Sandisk Cruzer):
Code:
openelec:~ # du -csh /storage/.xbmc/userdata/Thumbnails
247.5M  /storage/.xbmc/userdata/Thumbnails
247.5M  total
openelec:~ # time sh -c "cp -r /storage/.xbmc/userdata/Thumbnails/* /storage/downloads/Thumbnails && sync"
real    3m 40.32s best 3m 47.21s worst (1.12MB/s, 1.09MB/s)
user    0m 0.81s
sys     0m 14.17s

3 tests with f2fs (4GB Sandisk Cruzer):
Code:
openelec:~ # du -csh /storage/.xbmc/userdata/Thumbnails
301.0M  /storage/.xbmc/userdata/Thumbnails
301.0M  total
openelec:~ # time sh -c "cp -r /storage/.xbmc/userdata/Thumbnails/* /storage/downloads/Thumbnails && sync"
real    2m 15.49s best 2m 28.96 worst (2.22MB/s, 2.02MB/s)
user    0m 0.76s
sys     0m 10.40s

This still represents approx. 90% increase in performance so I guess I'm going to stick with f2fs.
Quote:What might be interesting is installing a new add-on or skin. I think the write speed would be significant in that.
I seem to remember Aeon Nox took a couple of minutes to install. Installing from a zip file would avoid internet download speed being the bottleneck.

Installing Aeon Nox 4.0.9 from a zip file took 1m 43s for ext4 and 1m 6s for f2fs - I couldn't get texturecache to work (something about JSON-RPC server not running), so I gave up.


RE: OpenELEC Testbuilds for RaspberryPi Part 2 - Trickname - 2013-12-20

here is mine:

f2fs

83.0M /storage/.xbmc/userdata/Thumbnails/
83.0M total
OpenELEC:~ # time sh -c "cp -r /storage/.xbmc/userdata/Thumbnails/* /storage/ &&
sync"
real 0m 31.08s
user 0m 0.25s
sys 0m 3.63s

using Intenso Speed Line 8 GB USB-Stick USB 3.0

copying .xbmc folder is much faster
OE feels a little quicker for me


RE: OpenELEC Testbuilds for RaspberryPi Part 2 - xbs08 - 2013-12-20

I'm gonna stick with f2fs too. It's not an overwhelming increase in performance but it's noticeable.


RE: OpenELEC Testbuilds for RaspberryPi Part 2 - allan87 - 2013-12-20

I hesitate to use file system that has not reached its first stable release. It seems imprudent. Anyone know enough about it to say that there are no serious concerns about file corruption, data loss, etc.?

It would also be interesting to see benchmarks that would reflect functions that are used on an everyday basis.


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