Bug #100132 Using optimal memory-barrier (in form of acquire/release) for event-mutex
| Submitted: | 7 Jul 2020 5:13 | Modified: | 22 Sep 2020 3:47 |
|---|---|---|---|
| Reporter: | Krunal Bauskar | Email Updates: | |
| Status: | Closed | Impact on me: | |
| Category: | MySQL Server: InnoDB storage engine | Severity: | S5 (Performance) |
| Version: | 8.0.20 | OS: | Any |
| Assigned to: | CPU Architecture: | ARM | |
| Tags: | event-mutex, memory-barrier, performance | ||
If the data you need to attach is more than 50MB, you should create a compressed archive of the data, split it to 50MB chunks, and upload each of them as a separate attachment.
To split a large file:
- On *nix platforms use the split command e.g.
split -b 50MB <my_large_archive> <my_split_archive_prefix> - On windows use WinZip or a similar utility to split the large file
[7 Jul 2020 5:14]
Krunal Bauskar
[7 Jul 2020 5:14]
Krunal Bauskar
x86 benchmark
Attachment: x86_eventmutex.png (image/png, text), 70.14 KiB.
[13 Jul 2020 14:37]
Jakub Lopuszanski
Proposal of a patch which provides provable correctness in C++14-compliant environment and performance on ARM
Attachment: seqcst_mutex.patch (application/octet-stream, text), 7.05 KiB.
[22 Jul 2020 9:19]
Krunal Bauskar
updated patch
Attachment: patch.bug100132 (application/octet-stream, text), 2.17 KiB.
[23 Jul 2020 12:51]
Jakub Lopuszanski
proposal based on m_waiters.exchange(..) used consistently
Attachment: rb.2 (application/octet-stream, text), 6.18 KiB.
[27 Jul 2020 7:03]
Krunal Bauskar
benchmark
Attachment: zipfian-x86.png (image/png, text), 129.72 KiB.
[27 Jul 2020 7:03]
Krunal Bauskar
benchmark
Attachment: uniform-x86.png (image/png, text), 128.43 KiB.
[27 Jul 2020 7:04]
Krunal Bauskar
benchmark
Attachment: zipfian-arm.png (image/png, text), 129.38 KiB.
[27 Jul 2020 7:04]
Krunal Bauskar
benchmark
Attachment: uniform-arm.png (image/png, text), 130.82 KiB.
[1 Aug 2020 7:09]
Krunal Bauskar
exchange arm benchmark
Attachment: arm-exchange.png (image/png, text), 98.76 KiB.
[1 Aug 2020 7:10]
Krunal Bauskar
exchange x86 benchmark
Attachment: x86-exchange.png (image/png, text), 101.55 KiB.
[4 Aug 2020 8:11]
Jakub Lopuszanski
Data for Proposal-1 and Proposal-2 ARM zipfian
Attachment: summary-arm-zipfian.png (image/png, text), 12.40 KiB.
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