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bthread能否引入STW进行实时打印 #2389

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vinllen opened this issue Sep 19, 2023 · 3 comments
Open

bthread能否引入STW进行实时打印 #2389

vinllen opened this issue Sep 19, 2023 · 3 comments

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@vinllen
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vinllen commented Sep 19, 2023

Is your feature request related to a problem? (你需要的功能是否与某个问题有关?)
tools工具下有个gdb_bthread_stack.py脚本，但是需要gdb attach，会导致gdb挂起，而且性能非常挫，bthread是否可以加一个STW，然后打印bthred stack，类似golang runtime中的实现。

Describe the solution you'd like (描述你期望的解决方法)

Describe alternatives you've considered (描述你想到的折衷方案)

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@wwbmmm
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wwbmmm commented Sep 19, 2023

STW需要语言级别支持吧。对于C++来说，好像只有gdb挂起才能把线程安全地停住吧

@vinllen
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vinllen commented Sep 20, 2023

gdb挂起感觉性能代价比较大，STW比如在协程分配的时候锁内保护，STW也在锁内，不过实现代价是比较高。

@chenBright chenBright mentioned this issue Oct 26, 2024
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@chenBright
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@vinllen 可以看看#2797

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@wwbmmm @vinllen @chenBright