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kuperxu (kuperxu)
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May 20 2021, 12:13 AM (51 w, 4 d)

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May 20 2021

kuperxu added a comment to D102833: [debugserver]Add platform cache support to improve performance.Under BigSur 11.3 this function causes a performance loss of 0.68s per execution..

I don't have permission to commit, please land this code.
Thank you @JDevlieghere

May 20 2021, 5:33 PM · Restricted Project
kuperxu added a comment to D102833: [debugserver]Add platform cache support to improve performance.Under BigSur 11.3 this function causes a performance loss of 0.68s per execution..

Currently the main time consuming performance is when loading the executable. In the MachProcess::GetMachOInformationFromMemory function if the executable has 100 load_command, then the function _dyld_process_info_create will be executed 100 times

May 20 2021, 2:53 AM · Restricted Project
kuperxu added a reviewer for D102833: [debugserver]Add platform cache support to improve performance.Under BigSur 11.3 this function causes a performance loss of 0.68s per execution.: aprantl.

The main reason for the problem is that dyld has modified the _dyld_process_info_create function implementation, which has increased the function's time consumption significantly and caused a huge delay in attaching the program.

May 20 2021, 2:40 AM · Restricted Project
kuperxu updated the diff for D102833: [debugserver]Add platform cache support to improve performance.Under BigSur 11.3 this function causes a performance loss of 0.68s per execution..

[debugserver]Recalculate the platform cache each time the port is cleared.

May 20 2021, 2:36 AM · Restricted Project
kuperxu requested review of D102833: [debugserver]Add platform cache support to improve performance.Under BigSur 11.3 this function causes a performance loss of 0.68s per execution..
May 20 2021, 2:30 AM · Restricted Project