Re: Improve CRC32C performance on SSE4.2

Andy Fan <zhihuifan1213@163.com>

From: Andy Fan <zhihuifan1213@163.com>

To: John Naylor <johncnaylorls@gmail.com>

Cc: Nathan Bossart <nathandbossart@gmail.com>, "Devulapalli, Raghuveer" <raghuveer.devulapalli@intel.com>, "pgsql-hackers@lists.postgresql.org" <pgsql-hackers@lists.postgresql.org>, "Shankaran, Akash" <akash.shankaran@intel.com>

Date: 2025-06-14T10:24:40Z

Lists: pgsql-hackers

Commits

Same data as JSON: GET /api/v1/messages/:b64id/commits the thread's linked commits as JSON, with link sources. API reference →

Include _mm512_zextsi128_si512() in AVX-512 configure probes.
- ccd5bc93fdfe 18.0 landed
Properly fix AVX-512 CRC calculation bug
- 43da394304fb 18.0 landed
Workaround code generation bug in clang
- f83f14881c7a 18.0 landed
Compute CRC32C using AVX-512 instructions where available
- 3c6e8c123896 18.0 landed
Inline CRC computation for small fixed-length input on x86
- e2809e3a1015 18.0 landed
Be more paranoid in configure's checks for CRC and POPCNT intrinsics.
- fdb5dd6331e3 18.0 cited

Attachments

config.log (application/octet-stream)
(unnamed) (text/plain)

Hi,

Recently I always get below error during initdb.

"""
UTC [1358059] FATAL:  incorrect checksum in control file
"""

the command is "initdb -D tmp". git bisect show me the related commit is 
3c6e8c123896584f1be1fe69aaf68dcb5eb094d5. After revert this commit on
the current master, everything is fine.  Does anyone knows the reason?

The attached is my config.log.