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runtime: split data/bss into 4K chunks for scanning #8888

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dvyukov opened this issue Oct 7, 2014 · 2 comments
Closed

runtime: split data/bss into 4K chunks for scanning #8888

dvyukov opened this issue Oct 7, 2014 · 2 comments
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@dvyukov
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dvyukov commented Oct 7, 2014 

If we split data/bss into 4K chunks, then it will improve parallelization of scanning
and make it more incremental (something we need for concurrent GC with GOMAXPROCS=1).
I've done it once, but it was reverted during precision changes.
When we have 1-bit/word pointer info, it will be trivial to restore:
1. Calculate number of 4K chunks.
2. Adjust scanning parfor boundary accordingly.
3. If a thread's parfor iteration index is data/bss scanning, it finds the relevant
piece of data/bass and relevant piece of data/bss pointer info and scans only that piece.
@rsc rsc added this to the Unplanned milestone Apr 10, 2015
@dvyukov
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dvyukov commented May 24, 2019

This was fixed by d3df04c right? @aclements

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Yep! Thanks for scrubbing these old issues.

@golang golang locked and limited conversation to collaborators May 23, 2020
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