Can you attach a longer strace with -T ?

On Wed, Dec 20, 2017 at 1:28 PM, Peter Warrington <sothisispe...@gmail.com>
wrote:

> Thank you! That is very interesting. In case it helps, I benchmarked my
> external HDD and it has an average read rate of 92.0 MB/s and an average
> access time of 16.37 msec. However, I didn't have any trouble with this
> previously.
>
> On Wednesday, December 20, 2017 at 9:06:16 PM UTC, Colin Cross wrote:
>>
>> Nothing looks wrong in that strace, it is making forward progress.  It
>> needs to read every directory and stat every file in the tree, is your
>> filesystem very slow for some reason?
>>
>> One difference I see between the old implementation using the find tool
>> and the new implementation is that find seems to be able to avoiding
>> calling stat on every directory entry, because the relevant information
>> (whether the entry is a subdirectory or a file) is contained in the return
>> from the getdents64 syscall.  The Go implementation is ignoring that
>> information and has to call lstat to get it.
>>
>> On Wed, Dec 20, 2017 at 11:32 AM, Peter Warrington <sothis...@gmail.com>
>> wrote:
>>
>>> Attached is a partial strace.
>>>
>>> On Wednesday, December 20, 2017 at 7:06:31 PM UTC, Colin Cross wrote:
>>>>
>>>> From the stack trace after ctrl-c, lunch will be waiting for the child
>>>> soong_ui process to complete.  An strace of that process would be
>>>> interesting.
>>>>
>>>> On Mon, Dec 18, 2017 at 4:12 PM, Alessandro Brucato <ale13...@gmail.com
>>>> > wrote:
>>>>
>>>>> This is the output of strace attached to the process in which I
>>>>> execute "lunch".
>>>>>
>>>>>
>>>>>
>>>>> <https://lh3.googleusercontent.com/-Rk-T1kCPUnA/WjhYORJYCKI/AAAAAAAAGSY/LIzqOc58jvkTpj7dowKqjz1OsKoAy0dZQCLcBGAs/s1600/strace.PNG>
>>>>>
>>>>> When "lunch" is stuck, the output of strace ends with "wait4(-1,". All
>>>>> the remaining part appears when I abort "lunch" with CTRL+C.
>>>>>
>>>>> Maybe this issue is due to the fact that I'm using a guest in
>>>>> Virtualbox?
>>>>>
>>>>> Il giorno lunedì 18 dicembre 2017 23:45:48 UTC+1, Colin Cross ha
>>>>> scritto:
>>>>>>
>>>>>> Can you capture the full output of all the stack traces?
>>>>>>
>>>>>> It's getting stuck while trying to walk all the checked-out code
>>>>>> looking for various build files.  If it was completely deadlocked then it
>>>>>> would have died on its own, so it's probably stuck in a loop somehow.
>>>>>>
>>>>>> On Mon, Dec 18, 2017 at 8:12 AM, Alessandro Brucato <
>>>>>> ale13...@gmail.com> wrote:
>>>>>>
>>>>>>> Hello, I'm trying to build the Android source code for my Hikey 960
>>>>>>> board.
>>>>>>> I'm following this video tutorial https://www.youtube.c
>>>>>>> om/watch?v=RD_NZRKiZBU in parallel to the official Android guide
>>>>>>> https://source.android.com/setup/devices#hikey-boards.
>>>>>>>
>>>>>>>
>>>>>>> Everything went fine until I reached the command "lunch
>>>>>>> hikey960-userdebug". It blocks, without returning any output. I left it
>>>>>>> "working" for 1 hour and then I aborted it (even if I know that this
>>>>>>> command should take few seconds). If I execute only "lunch" it shows the
>>>>>>> list of available build targets, and when I select "hikey960-userdebug" 
>>>>>>> it
>>>>>>> blocks. When I abort it with CTRL+C, it says "Still alive, killing
>>>>>>> subprocesses" and then it shows a lot of messages referring to threads.
>>>>>>> Here is the screenshot https://ibb.co/k32KQR
>>>>>>> I noticed that also the "make" command (inside the AOSP directory)
>>>>>>> has the same behaviour.
>>>>>>>
>>>>>>>
>>>>>>> This is the list of commands I've used during the process:
>>>>>>>
>>>>>>>
>>>>>>> sudo apt-get install openjdk-7-jdk
>>>>>>>
>>>>>>> sudo apt-get install git-core gnupg flex bison gperf build-essential
>>>>>>> zip curl zlib1g-dev gcc-multilib g++-multilib libc6-dev-i386
>>>>>>> lib32ncurses5-dev x11proto-core-dev libx11-dev lib32z-dev ccache
>>>>>>> libgl1-mesa-dev libxml2-utils xsltproc unzip
>>>>>>>
>>>>>>> mkdir output
>>>>>>>
>>>>>>> export OUT_DIR_COMMON_BASE=/home/brucedh/output/
>>>>>>>
>>>>>>> mkdir ~/bin
>>>>>>>
>>>>>>> PATH=~/bin:$PATH
>>>>>>>
>>>>>>> curl https://storage.googleapis.com/git-repo-downloads/repo >
>>>>>>> ~/bin/repo
>>>>>>>
>>>>>>> chmod a+x ~/bin/repo
>>>>>>>
>>>>>>> mkdir dev
>>>>>>>
>>>>>>> cd dev
>>>>>>>
>>>>>>> mkdir hikey960
>>>>>>>
>>>>>>> cd hikey960
>>>>>>>
>>>>>>> git config --global user.name "<REDACTED>"
>>>>>>>
>>>>>>> git config --global user.email "<REDACTED>"
>>>>>>>
>>>>>>> repo init -u https://android.googlesource.com/platform/manifest -b
>>>>>>> master
>>>>>>>
>>>>>>> repo sync –j4
>>>>>>>
>>>>>>> git clone https://android.googlesource.com/kernel/hikey-linaro
>>>>>>>
>>>>>>> cd hikey-linaro
>>>>>>>
>>>>>>> git checkout -b android-hikey-linaro-4.9
>>>>>>> origin/android-hikey-linaro-4.9
>>>>>>>
>>>>>>> make ARCH=arm64 menuconfig
>>>>>>>
>>>>>>> make ARCH=arm64 hikey960_defconfig
>>>>>>>
>>>>>>> PATH=/home/brucedh/dev/hikey960/prebuilts/gcc/linux-x86/
>>>>>>> aarch64/aarch64-linux-android-4.9/bin/:$PATH
>>>>>>>
>>>>>>> make ARCH=arm64 CROSS_COMPILE=aarch64-linux-android- -j4
>>>>>>>
>>>>>>> cp arch/arm64/boot/dts/hisilicon/hi3660-hikey960.dtb
>>>>>>> ../device/linaro/hikey-kernel/hi3660-hikey960.dtb-4.9
>>>>>>>
>>>>>>> cp arch/arm64/boot/Image.gz ../device/linaro/hikey-kernel/
>>>>>>> Image.gz-hikey960-4.9
>>>>>>>
>>>>>>> cd ~/dev/hikey960
>>>>>>>
>>>>>>> . ./build/envsetup.sh
>>>>>>>
>>>>>>> lunch hikey960-userdebug
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> I'm using Ubuntu 16.04 LTS as guest on Virtualbox. I tried to do all
>>>>>>> the process once again from the beginning with a new virtualbox image, 
>>>>>>> but
>>>>>>> I found the same problem.
>>>>>>>
>>>>>>> Thanks in advance!
>>>>>>>
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