Re: Non-reproducible AIO failure

Andres Freund <andres@anarazel.de> writes:
> Both of you are running Ventura, right?

FTR, the machines I'm trying this on are all running current Sequoia:

[tgl@minim4 ~]$ uname -a
Darwin minim4.sss.pgh.pa.us 24.5.0 Darwin Kernel Version 24.5.0: Tue Apr 22 19:53:27 PDT 2025;
root:xnu-11417.121.6~2/RELEASE_ARM64_T6041arm64 

Interestingly, the M1 seems to be using a different kernel build than
my two M4 machines:

[tgl@minim1 ~]$ uname -a
Darwin minim1.sss.pgh.pa.us 24.5.0 Darwin Kernel Version 24.5.0: Tue Apr 22 19:48:46 PDT 2025;
root:xnu-11417.121.6~2/RELEASE_ARM64_T8103arm64 

although Apple has a history of using kernels customized to specific
core counts, so maybe that's all there is there.

These are all personally-owned bare metal:

[tgl@minim4 ~]$ profiles status -type enrollment
Enrolled via DEP: No
MDM enrollment: No
[tgl@minim4 ~]$ kextstat -l | grep -v com.apple
Executing: /usr/bin/kmutil showloaded --list-only
No variant specified, falling back to release

As for your previous question, I tried both c=16 and c=32 on
the M4.

            regards, tom lane