Commits on Mar 4, 2024

1. Faster (almost 2x) mutexes (was slower due to ThreadFuzzer) …

   Recently I noticed that DB::injection() pops up in perf top, so let's
   optimize it slightly:
   - Add -fomit-frame-pointer -momit-leaf-frame-pointer explicitly --
     almost 0 effect
   - Add ALWAYS_INLINE for ThreadFuzzer::isStarted() (just in case)
   - Disable ThreadFuzzer if non of env variables had been set, this is
     needed to avoid extra checks in DB::injection()
   - Add ALWAYS_INLINE for ThreadFuzzer::injection()
   
   And here are some results for ThreadFuzzer test:
   - before:   elapsed 6.27368 / test time 654 ms
   - after:    elapsed 3.14167 / test time 325 ms
   - disabled: elapsed 2.46666 / test time 263 ms
   
   *But note, it is still slower then with ThreadFuzzer disabled.*
   
   Note, that this numbers for AMD 5975WX, for server with 2x Xeon Silver
   4216 2.10:
   - before:   elapsed 12.109  / test time 1325 ms
   - after:    elapsed 10.506  / test time 1101 ms
   - disabled: elapsed 8.41043 / test time 917 ms
   
   P.S. I've also tried with the same glibc version as server had - zero
   changes.
   
   Refs: https://gist.github.com/azat/51a5fcc3a40af9f678906a3a6e14e079
   Signed-off-by: Azat Khuzhin <[email protected]>

   

   azat committed Mar 4, 2024
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