Question about policies when profiling browser process on Linux

[Weiliang]

I was looking at my result with linux.browser policy, and I am wondering about exact meaning of some categories:

- What exactly is file-nonexec?

- How do I find in code what is allocated with tc, and what is by mmap? If I am interested in a more detailed category than mmap-catch-all, how can I achieve that?

- What is the correlation between measurement categories in dmprof and memory telementry test? Particularly the vm_final_size, vm_peak_size, vm_private_dirty_final, and vm_resident_set_size_final_size?

Thanks,

Wei

[JungJik Lee]

- What exactly is file-nonexec?

file-nonexec is a memory block which can not be executed.

a block which does not have x flag in /proc/<PID>/maps.

such as font, some r/w only memory in so files, etc.

- How do I find in code what is allocated with tc, and what is by mmap?

 If I am interested in a more detailed category than mmap-catch-all, how can I achieve that?

I think you should enable tcmalloc for this.

however unfortunately we can not turn tcmalloc in android.

but it would work for linux.

gyp options for this >

profiling=1 profiling_full_stack_frames=1 linux_dump_symbols=1 use_allocator="tcmalloc"

- What is the correlation between measurement categories in dmprof and memory telementry test?

Particularly the vm_final_size, vm_peak_size, vm_private_dirty_final, and vm_resident_set_size_final_size?

dmprof shows more details of native allocation memory, not like dalvik's memory allocation.

I hope this would help you. please let me know if I am wrong.

2015년 5월 5일 화요일 오전 4시 55분 21초 UTC+9, Weiliang 님의 말:

[Weiliang Chen]

Thank you so much for your reply!

On Mon, May 11, 2015 at 6:21 AM, JungJik Lee <jungj...@samsung.com> wrote:

- What exactly is file-nonexec?

file-nonexec is a memory block which can not be executed.

a block which does not have x flag in /proc/<PID>/maps.

such as font, some r/w only memory in so files, etc.

- How do I find in code what is allocated with tc, and what is by mmap?

 If I am interested in a more detailed category than mmap-catch-all, how can I achieve that?

I think you should enable tcmalloc for this.

however unfortunately we can not turn tcmalloc in android.

but it would work for linux.

gyp options for this >

profiling=1 profiling_full_stack_frames=1 linux_dump_symbols=1 use_allocator="tcmalloc"

btw I didn't have much luck with profiling_full_stack_frames=1 flag, never able to build if I turn it on.

I will try out the tcmalloc build though. Thanks!

 

- What is the correlation between measurement categories in dmprof and memory telementry test?

Particularly the vm_final_size, vm_peak_size, vm_private_dirty_final, and vm_resident_set_size_final_size?

dmprof shows more details of native allocation memory, not like dalvik's memory allocation.

If that is the case, does that mean dmprof is not a very good tool to use for analyzing telemetry test memory usage change? 

I hope this would help you. please let me know if I am wrong.

2015년 5월 5일 화요일 오전 4시 55분 21초 UTC+9, Weiliang 님의 말:

I was looking at my result with linux.browser policy, and I am wondering about exact meaning of some categories:

- What exactly is file-nonexec?

- How do I find in code what is allocated with tc, and what is by mmap? If I am interested in a more detailed category than mmap-catch-all, how can I achieve that?

- What is the correlation between measurement categories in dmprof and memory telementry test? Particularly the vm_final_size, vm_peak_size, vm_private_dirty_final, and vm_resident_set_size_final_size?

Thanks,

Wei

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[JungJik Lee]

2015년 5월 11일 월요일 오후 9시 35분 48초 UTC+9, Weiliang Chen 님의 말:

Thank you so much for your reply!

On Mon, May 11, 2015 at 6:21 AM, JungJik Lee <jungj...@samsung.com> wrote:

- What exactly is file-nonexec?

file-nonexec is a memory block which can not be executed.

a block which does not have x flag in /proc/<PID>/maps.

such as font, some r/w only memory in so files, etc.

- How do I find in code what is allocated with tc, and what is by mmap?

 If I am interested in a more detailed category than mmap-catch-all, how can I achieve that?

I think you should enable tcmalloc for this.

however unfortunately we can not turn tcmalloc in android.

but it would work for linux.

gyp options for this >

profiling=1 profiling_full_stack_frames=1 linux_dump_symbols=1 use_allocator="tcmalloc"

btw I didn't have much luck with profiling_full_stack_frames=1 flag, never able to build if I turn it on.

I will try out the tcmalloc build though. Thanks!

 

- What is the correlation between measurement categories in dmprof and memory telementry test?

Particularly the vm_final_size, vm_peak_size, vm_private_dirty_final, and vm_resident_set_size_final_size?

dmprof shows more details of native allocation memory, not like dalvik's memory allocation.

 

If that is the case, does that mean dmprof is not a very good tool to use for analyzing telemetry test memory usage change? 

I am not sure that how you will use telemetry memory usage with dmp.

telemetry already provides a script for tracking memory usage. ( https://goo.gl/2lRFXZ ).

dmp is post-mortem memory profiler. so I think it is not easy to sync with telemetry result.