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Thread: What is it doing when it becomes unresponsive?

  1. #1
    Soundwave
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    What is it doing when it becomes unresponsive?

    Is there any way to find out what is slowing things down? I have tried a couple of system monitors but they do not make sense as they never show a high enough CPU or RAM usages to explain the slugishness.

  2. #2
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    I always do a cold boot when mine gets sluggish.

  3. #3
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    If you have just turned it on it isn't the CPU or the RAM. When you bring your TF700 out of sleep it does some WiFi checks, mail and any other live widgets and the result is disk activity, (not RAM, NAND). The NAND in the TF700 is relatively slow.

    If it is an all the time thing then follow Mike's suggestion

  4. #4
    Soundwave
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    I guess the nand flash is plausible as it's not always sluggish

    It certainly is infuriating they would hobble this device with a slow SSD but they did the same thing on the Eeepc netbooks.

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    Bumblebee
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    Quote Originally Posted by qwertinsky View Post
    I guess the nand flash is plausible as it's not always sluggish

    It certainly is infuriating they would hobble this device with a slow SSD but they did the same thing on the Eeepc netbooks.
    Well, I'm sure they were trying to work within a budget. Remember that ssd is still relatively expensive.
    Gtanner00 likes this.
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  6. #6
    Ratchet
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    For me the sluggishness started after the update before the last one (forgot the number). Factory reset, cold boot etc made no difference. Mine had been running great, better than it ever did in fact. I've been hoping a new update would fix it. I don't think it's the fault of the memory. I think it's bad code and if I could revert to 4.1 it would run great, just like before.

  7. #7
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    I've looked a bit into the filesystem handling recently.. my TF700T (Android 4.1.1) does things a bit differently than stock Android on large-eMMC devices. The out-of-the-box way is to have the larger part of the NAND/eMMC as a FAT32 partition. This is presumably to make it really easy for vendors to provide the user/data section (set up as 'internal' SD card) as a mass-storage device for easy transfer to PCs etc.

    Asus, however, mounts the internal large partition (56GB on my TF700T) as a FUSE filesystem (File system in UsEr space). On 4.1.1 it's a single FUSE filesystem, on 4.2.1 there are at least four of them, mounted in various ways. Now, a FUSE filesystem is a great way to give a filesystem exactly the features you need, and something better than FAT32 can easily be provided (and until recently Android would not support larger than 32GB as FAT32 anyway). But a FUSE filesystem is implemented via a user-level application, it's not directly handled by the kernel. When some app does a filesystem operation the kernel will catch that operation (e.g. open, read, write..) and then feed the operation to the user-level program (application) which does the actual job. The problem with this, compared to a 'native' filesystem like ext4 (or even FAT32) is that it's slower, and, worse, the user-level application is affected by the same context switches, priorities, waits etc. that every other process is. If something prevents the user-level FUSE handler to run properly you could get stuttering and delays. To analyze if this is what really happens you would need to do some root-level serial shell-level monitoring I think. In any case there's no reason to believe you can easily compare with other Android devices. Another device with the exact same apps can be problem-free even if an app misbehaves, the symptoms on an Asus tablet can be very different because its filesystem handler(s) run(s) in user space.

    -Tor
    droidbound and Gtanner00 like this.

  8. #8
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    This would explain why Sbdags has gotten great results with his cache2sd and data2sd mods (have not tried either) in his rom. They reliy on only one file system instead of the 4 you refer to so it would make a difference even when using equal or slightly slower external sd cards.
    *I apologize for any spelng mistakes. I frequently answer questions on my phone. The content is (usually) good, but the words may not be intelligible. If you cant understand my post... check back later or call me out on it.
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  9. #9
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    Quote Originally Posted by Gtanner00 View Post
    This would explain why Sbdags has gotten great results with his cache2sd and data2sd mods (have not tried either) in his rom. They reliy on only one file system instead of the 4 you refer to so it would make a difference even when using equal or slightly slower external sd cards.
    Actually sbdags never implemented data2sd in the rom and he himself does not use it. It's an option to use with specific kernels, but it actually does not yield much improvement in speed or smoothness on that rom and causes more headaches in setup and maintenance than it's worth in many people's opinion.
    cache2sd is an option in the latest versions, considered to be experimental and has not done anything for me in my setup.
    But naturally your experience may differ.....

    Sent from my ASUS Transformer Pad TF700T using Tapatalk 4
    TF700 on Android 7 Nougatella TF701 Katshmallow (Android 6.0.1) Nexus 5x on Pure Nexus Nougat/Google Fi


 

 

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