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Setting CPU freq to 1GHz

posted in Uncategorized
Monday, June 27 2011, 10:20 PM
biga
biga
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Hi! I am using IGEPv2 RC 1GHz board but currently CPU is running at 799.29 according to /proc/cpuinfo Installed kernel: 2.6.35-1010-linaro-omap #17 My question is how can I increase the CPU freq to 1GHz? I installed u-boot fw_setenv as described in [url=http://labs.igep.es/index.php/How_to_modify_the_uboot_environment_from_userspace:25iz0jbn]http://labs.igep.es/index.php/How_to_modify_the_uboot_environment_from_userspace[/url], but fw_printenv shows nothing. What is the best method to set CPU freq with this kernel? Thanks for your answer. bigA.
Responses (8)
  • Accepted Answer

    mcaro
    mcaro
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    Tuesday, June 28 2011, 10:19 AM - #permalink
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    Maybe the better way it\\\'s upgrade Xloader & uboot or replace it with IGEP Xloader. Cheers Manel
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  • Accepted Answer

    Tuesday, July 19 2011, 06:22 PM - #permalink
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    Is there a precompiled version of the latest igep x-loader (SD card ver.) available for download somewhere? Do both uboot and x-loader need to be replaced for 1GHz to work or is x-loader enough?
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  • Accepted Answer

    mcaro
    mcaro
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    Tuesday, July 19 2011, 06:34 PM - #permalink
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    Hi, IGEP xloader it\\\'s the same for microsd card or Flash memory. You only need the IGEP xloader. You can download the latest precompiled binaries from here: [url=http://downloads.igep.es/files/IGEP_xloader/igep-x-loader-2.1.0-2.tar.bz2]http://downloads.igep.es/files/IGEP_xlo ... -2.tar.bz2[/url] Cheers Manel
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  • Accepted Answer

    Tuesday, July 19 2011, 11:07 PM - #permalink
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    Ok, I copied the x-load.bin.ift file to the boot partition and renamed it to MLO. I edited the igep.ini file for IGEPv2 board and pointed the kernel image and initrd parameters to uImage and uInitrd (Linaro original kernel and initrd). Xloader boots and comes to \\\"XLoader: IGEPv2 kernel boot...\\\" but nothing happens after. Am I trying to do something impossible? I.e. trying to boot the original Linaro kernel? I used \\\"file\\\" on the kernel file and it says it\\\'s a u-boot image (wrong type for xloader?). Also, the original Linaro image load addresses for the kernel and initrd are different than the ones specified in the igep.ini (where it says do not change). What to do? Thanks, Nite
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  • Accepted Answer

    mcaro
    mcaro
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    Wednesday, July 20 2011, 08:19 AM - #permalink
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    Hi Nite, IGEP xloader only boot standard kernel images such zImage, bzImge... You are trying to boot a uImage kernel that it\\\'s not a standard image in fact this image it\\\'s modified for boot use the uboot. Replace the uImage for the zImage ... Manel
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  • Accepted Answer

    Friday, August 05 2011, 11:38 AM - #permalink
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    Hi, I\\\'m using the linaro distro with the Kernel linux-omap-2.6.35.13-2 and the IGEP Xloader on IGEPV2 Rev RC5 1)When i set mpurate=500 in the igep.ini, i\\\'ve got 480 Mbips with cat /proc/cpuinfo. and when i use mpurate=1000 i\\\'ve got 867 Mbips. My question is, what else can i try to set my cpu at 1 GHz ? 2)I found linaro-desktop very slow (i\\\'m running it at display 720p), what can i do for that ? Thanks in advance !
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  • Accepted Answer

    Friday, August 05 2011, 01:26 PM - #permalink
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    Hi, The mpurate feature is partially implemented and untested in kernel 2.6.35. So i think is not working well. This should be solved in next kernel version. I don\\\'t think the problem is the cpu speed, I\\\'m running a linaro with OMAP3530 at 720MHz an is running well. I guess the problem is related to the SD card type, what type class is your SD card ? A higher SD card class can increase the performance.
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  • Accepted Answer

    Friday, August 05 2011, 07:10 PM - #permalink
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    Thank you for your quick answer ! My Sd card class is 4 (4mb/s). Which class card are you using ? Do you think it\\\'s quickier to use the ethernet 100mb/s(nfs) instead of Sd card !? Good to know for the Kernel, just for the info, which \\\"last\\\" kernel do we need to use to obtain the 1GHz ?
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