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maemo.org - Talk (https://talk.maemo.org/index.php)
-   Maemo 5 / Fremantle (https://talk.maemo.org/forumdisplay.php?f=40)
-   -   [ANNOUNCE] CSSU-thumb thread - stable Thumb2 on N900 (https://talk.maemo.org/showthread.php?t=84829)

freemangordon 2012-06-12 11:02
Re: [ANNOUNCE] CSSU-thumb thread - stable Thumb2 on N900
 
Quote:
Originally Posted by lma (Post 1220849)
An analogy, not a direct comparison :-) A lot of the same underlying issues apply, ie you won't see much of the potential performance improvement until you have converted most of the software stack.
Agree.

Quote:
Well, if you have a thumb2 binary issuing calls to the standard (non-thumb) libc etc, there's going to be switching. Or am I missing something?
If you use VFP then there is no difference whether it is pure ARM, ot thumb2, in either case you have a penalty if the code is not well optimized. The major difference between thumb and thumb2 is that thumb2 is almost as fast as ARM, and AFAIK there is no penalty for mixing ARM/thumb2 code.

don_falcone 2012-06-12 11:09
Re: [ANNOUNCE] CSSU-thumb thread - stable Thumb2 on N900
 
Info: with 2.9M available rootfs, i still have to move '/usr/share/themes/beta' (7.1M) and '/usr/share/nokia-maps' (8.1M) back. This is after removal of kernel-power.

mankir 2012-06-12 11:34
Re: [ANNOUNCE] CSSU-thumb thread - stable Thumb2 on N900
 
Some observations:
-2.6.28.10-cssu1 is running on 850 Mhz
-you have to install kernel-cssu-flasher
-cat /proc/cpuinfo doesn't show thumb2
-kernel too old to chroot into ubuntu 12.04

praveenchand 2012-06-12 11:40
Re: [ANNOUNCE] CSSU-thumb thread - stable Thumb2 on N900
 
after installing N900 is hanging after a while, also i cannot use terminal, when i open it get freeze

freemangordon 2012-06-12 11:54
Re: [ANNOUNCE] CSSU-thumb thread - stable Thumb2 on N900
 
Quote:
Originally Posted by praveenchand (Post 1220872)
after installing N900 is hanging after a while, also i cannot use terminal, when i open it get freeze
Which kernel boots? it MUST be -cssu1

freemangordon 2012-06-12 11:57
Re: [ANNOUNCE] CSSU-thumb thread - stable Thumb2 on N900
 
Quote:
Originally Posted by mankir (Post 1220871)
Some observations:
-2.6.28.10-cssu1 is running on 850 Mhz
-you have to install kernel-cssu-flasher
-cat /proc/cpuinfo doesn't show thumb2
-kernel too old to chroot into ubuntu 12.04
But of course, it is the same old KP50 with some modification, read the OP.

You only have to install kernel-cssu-flasher if you did not update in HAM/did not do apt-get update, so an older version of mp-fremantle-community-pr is used

praveenchand 2012-06-12 12:02
Re: [ANNOUNCE] CSSU-thumb thread - stable Thumb2 on N900
 
Quote:
Originally Posted by freemangordon (Post 1220880)
Which kernel boots? it MUST be -cssu1
i have installed CSSU testing.....booting into power kernel

//Edit: I did apt-upgrade, not via HAM

Hurrian 2012-06-12 12:05
Re: [ANNOUNCE] CSSU-thumb thread - stable Thumb2 on N900
 
Quote:
Originally Posted by praveenchand (Post 1220884)
i have installed CSSU testing.....booting into power kernel

//Edit: I did apt-upgrade, not via HAM
You need to boot into the CSSU kernel, using CSSU thumb.

(Side note: this is incredibly promising. Wish both of these get merged into CSSU-main and KP.)

freemangordon 2012-06-12 12:07
Re: [ANNOUNCE] CSSU-thumb thread - stable Thumb2 on N900
 
Quote:
Originally Posted by praveenchand (Post 1220884)
i have installed CSSU testing.....booting into power kernel

//Edit: I did apt-upgrade, not via HAM
Well, again, you MUST have kernel-cssu flashed (or kernel-cssu-bootimg booted via u-boot) in order to have stable thumb2, there is just no other way.

You could try a full power cycle, sometimes the device does not cleanly reboot and SGX driver almost freezes the system

freemangordon 2012-06-12 12:08
Re: [ANNOUNCE] CSSU-thumb thread - stable Thumb2 on N900
 
Quote:
Originally Posted by Hurrian (Post 1220886)
You need to boot into the CSSU kernel, using CSSU thumb.

(Side note: this is incredibly promising. Wish both of these get merged into CSSU-main and KP.)
Thumb2 support is going in next KP for sure. While for CSSU-main, well, you'd better ask the maintainers :P


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