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#apertus IRC Channel Logs

2019/04/13

Timezone: UTC


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comradekingu
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06:30
Bertl_oO
off to bed now ... have a good one everyone!
06:31
Bertl_oO
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06:40
BAndiT1983|away
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mithro
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11:54
rohan_
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11:55
rohan_
hey BAndiT11983
11:58
rohan_
why are the function in Adapter/IAdapter.h defined as pure virtual functions?
11:59
rohan_
would we not be declaring them at all in the future?
12:02
se6astian|away
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12:04
rohan_
hey se6astian
12:10
BAndiT1983
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12:11
rohan_
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se6astian
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13:42
se6astian|away
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14:22
Bertl_zZ
changed nick to: Bertl
14:22
Bertl
morning folks!
14:56
anuejn
morning :)
15:11
se6astian
great to see progress on firmware usb front!
15:11
se6astian
well done
15:13
se6astian
beside gabe the community effort wasn't that great after the call to action via email unfortunately...
15:16
anuejn
well there was someone contributing a patch
15:16
Bertl
probably related to the fact that there are not many developers among the Early Beta owners
15:16
anuejn
yup
15:16
vup2
the guys contributing fixing the path's are gsoc's studendts
15:16
vup2
*people
15:16
se6astian
gsoc helped a bit definitely, great to see activity from students!
15:17
anuejn
but i can see a trend of people slowly starting to contribute small things
15:17
anuejn
which is nice
15:19
vup2
yes i think putting the issues and the current development stuff on github help a bit
15:23
anuejn
we might also want to host the builds of the other branches somewhere
15:24
anuejn
so that people could easily test these for us
15:25
Bertl
btw, any clues about the slow SD card yet?
15:25
anuejn
something like https://builds.magiclantern.fm/experiments.html
15:26
anuejn
i havent looked into it yet... vup?
15:26
vup2
not yet
15:26
vup2
i'll try to take a look today
15:26
Bertl
great! thanks!
15:26
vup2
however i don't know for certain if i have a fast enough sdcard available to properly testit
15:28
comradekingu
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15:31
Bertl
any UHS 1 or class 10 SD card should have fast enough read speeds to go over the current limit
15:32
vup2
well at the moment i am using a class 6 SD card ;)
15:32
vup2
but i have some more lying around
15:44
futarisIRCcloud
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15:59
vup2
Bertl: what read speeds were you getting?
16:00
vup2
and expecting?
16:01
vup2
btw irc log are broken for https
16:02
Bertl
consistently half of the expected maximum ... and yes, IRC logs are from a time when https was an emerging technology :)
16:03
vup2
ok found it in the logs
16:03
vup2
so i am getting about 19-20 MB/s
16:04
Bertl
that would be an improvement
16:04
vup2
which is a bit lower then maximum (and what i am getting with the same SD card on my laptop: 24 MB/s)
16:04
vup2
but the thing is i didn't change anything
16:04
Bertl
very strange
16:04
Bertl
how do you test?
16:04
vup2
also at that speed dd is taking about 50% cpu time
16:05
vup2
just dd if=/dev/mmcblk0 of=/dev/null status=progress
16:05
Bertl
did you flush the caches before?
16:05
Bertl
alternatively use direct I/O
16:06
vup2
yes did flush caches before
16:07
Bertl
so that is with the latest SD image?
16:08
vup2
somewhat latest
16:08
vup2
ok so with direct io i am getting a consistent 17.3 MB/s
16:09
vup2
not sure why that is lower then with dropping caches and normal io
16:09
vup2
also that matches what a simple ` pv /dev/mmcblk0 > /dev/null` gets
16:26
vup2
Bertl: ok so i definitely found the may to change the frequency and it is definitely is at 50MHz
16:27
vup2
that gets about 16.5 to 17 MB/s
16:29
vup2
(not sure if that would be better with a better SD card, but this SD card gets >23MB/s with my laptop)
16:30
Bertl
well, it looks definitely better than my tests
16:30
vup2
and not using direct io (but dropping caches before a test) gets about 19 to 20MB/s which matches what xilinx found in their benchmarks
16:30
vup2
on which kernel version are you on?
16:31
vup2
some time ago we updated to 4.20 (that was together with fixing QSPI)
16:31
Bertl
ah, that was probably after my testing
16:32
vup2
ok maybe try a newer version then
17:01
Bertl
will do, care to paste a link to the latest version?
17:23
vup2
you can find them here https://github.com/apertus-open-source-cinema/axiom-beta-firmware/releases
17:23
vup2
the newest one being https://github.com/apertus-open-source-cinema/axiom-beta-firmware/releases/download/nightly%2F1d7e001d/axiom-beta-1d7e001d.img.xz
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lexano
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Bertl
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Bertl
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Spirit532
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BAndiT1983|away
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comradekingu
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20:48
BAndiT1983
rohan_, this class is an interface and pure virtual functions are used, as there is no keyword in C++ for, like in C# or Java
20:49
BAndiT1983
every interface class has I as prefix for the name
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BAndiT1983
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se6astian
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22:52
Bertl
off to bed now ... have a good one everyone!
22:52
Bertl
changed nick to: Bertl_zZ