06-11-2012, 06:57 PM | #61 | |
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Quote:
Code:
[root@kindle test]# ./test-neon 2.200002 2.200001 5 ans = 9.705820 5539 loop/msec [root@kindle test]# ./test 2.200002 2.200001 5 ans = 9.705820 1478 loop/msec |
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06-11-2012, 07:16 PM | #62 | |
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Can you post test-neon binary somewhere I can grab it (PM if needed). My bad - I misread the output. Hardware is about 4x faster. That should make a difference to mpeg123 or any other media application. Last edited by knc1; 06-11-2012 at 07:22 PM. |
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06-11-2012, 07:25 PM | #63 | |
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test test-neon test-vfpv3 Edit: read your edit too late Last edited by baf; 06-11-2012 at 07:29 PM. Reason: Edit: ok, just read your edit :) |
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06-11-2012, 07:27 PM | #64 |
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06-11-2012, 08:10 PM | #65 | |
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https://www.mobileread.com/forums/sho...0&postcount=59 for you. Last edited by knc1; 06-11-2012 at 08:14 PM. |
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06-12-2012, 04:43 AM | #66 |
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Thanks. I updated linked post with additional info.
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06-12-2012, 06:33 AM | #67 |
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That particular combination of -mcpu= -mtune= -march= is redundant
but it does no harm. Leave it just the way you have written it. My own personal practice is to do as you have done: put all the options right on the command line where the user can read them rather than expect the user to know the internals of the gcc option setting(s). Translation: We who write the advice get to RTFM, end-users get to cut&paste. Ref: http://gcc.gnu.org/onlinedocs/gcc-4....ml#ARM-Options |
06-12-2012, 10:47 AM | #68 |
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Here is mplayer built with the above options (using neon fpu) if somebody wants to test.
Funny thing I didn't know is you can start movie out of the box, using X11 output: Code:
./mplayer -vo x11 -title "L:A_N:application_ID:mplayer" test.mpg |
06-12-2012, 10:51 AM | #69 | |
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X11 does not know how to dither. Grayscale video IS horrible... To see what dithering can do, check this out: https://www.mobileread.com/forums/sho...d.php?t=177455 |
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06-12-2012, 05:08 PM | #70 |
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@geekmaster
Thanks for the info. That's really impressive. I have to read and try all this stuff. |
06-14-2012, 12:36 AM | #71 |
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A word of warning on the hardfloat front:
I've just updated my TC to use GCC 4.7-Linaro-2012.06, configured to default to the hardf ABI, and, well, don't: It now generates binaries that'll call ld-linux-hardf instead of ld-linux (probably to avoid ABI mismatch between soft/hardf libraries). |
06-14-2012, 01:11 AM | #72 | |
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They have multi-lib'd the toolchain (and provide both run-times now). The run-times are in another archive, alongside of the toolchain archive. Since 2012.06 is a daily build on the repository trunk (it doesn't release until the end of the month), you might want to stay with the old 2012.05. The release page is indexed: https://wiki.mobileread.com/wiki/Tool...ode_References The 2012.05 (both compiler and runtime) is also mirrored at: http://drpbox.knetconnect.com/KeK Maybe it was in the "Changes" or "Milestones" documentation: Introduced in 2012.04, optional in 2012.05, adopted 2012.06 As I recall (but my memory may be wrong). Last edited by knc1; 06-14-2012 at 05:00 AM. |
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06-14-2012, 12:13 PM | #73 |
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@knc1: .06 was released yesterday .
But, yeah, I'll check the previous release notes, I was using 4.6-2012.03 before that... EDIT: Yup: * Uses the new /lib/ld-linux-armhf.so.3 loader for hard float binaries |
06-14-2012, 12:30 PM | #74 | |
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This Linaro project does not let grass grow under their feet, nor wait for gnu-gcc project to release something. Of course, they have a fairly large corporation with deep pockets footing the bill - these are mostly paid professionals running at max. throttle. |
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06-29-2012, 09:02 AM | #75 |
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would be nice to get all these compilation titbits on one thread. the wiki section on cx-comp perhaps. makes notes... thanks for the tips
Last edited by twobob; 06-29-2012 at 09:03 AM. Reason: because I can't spell. blatantly |
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