Question about rr alternative design

Octav Chipara ochipara at
Tue Feb 20 19:14:48 UTC 2018


I have a question about the mechanisms that rr uses the record sys calls. One of the issues that limits rr's performance is that intercepting system calls usually requires 2 context switches (without the Seccomp optimization) . An alternative would be to intercept/wrap libc calls that map to system calls and perform most of the logging in user space. I was wondering if you guys took a look at this alternative.

— Octav 

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