[cfarm-users] gcc104: rosetta and disk space concerns

[Pierre Muller]

   Hello,

   I suspect that the one user is me,
should I disable completely all checks using rosetta
until you find a solution for that problem?

I apologize for the inconvenience.

Pierre Muller


Le 24/10/2022 à 15:51, Zach van Rijn via cfarm-users a écrit :
> On Tue, 2022-10-18 at 10:00 -0500, Zach van Rijn via cfarm-users
> wrote:
>> ...
>>
>> Rosetta is installed now.
>>
>> gcc104 (homebrew):~ zv$ gcc -arch x86_64 foo.c -o foo
>> gcc104 (homebrew):~ zv$ file foo
>> foo: Mach-O 64-bit executable x86_64
>> gcc104 (homebrew):~ zv$ ./foo
>> hello!
> 
> 
> When an x86_64 binary is executed, it results in the creation of
> an image at /System/Volumes/Data/private/var/db/oah/. This is the
> ahead-of-time translation artifact cache [0], and will fill the
> disk if left undisturbed (meaning I manually delete files in it).
> 
> One user of this system runs automated tests with a low system
> load, which is normally a perfect use of the farm, however these
> unit/regression tests seem to create ~50GB of artifacts per day.
> 
> Right now this means there are 80k files and 80k directories (one
> file per directory) at 67GB, since I last cleared it 2 days ago.
> 
> Suppose two people did this, maybe the disk fills up even faster.
> 
> The immediate solution is to delete all cached artifacts, since
> the translation is performed again, transparently, if needed.
> 
> I am looking for a more robust solution than this [1], to ensure
> that the disk never fills up with these artifacts. Running a cron
> job is not ideal since the rate of disk usage is not constant
> w.r.t. time. I could check every N hours if X storage is used,
> and then to delete the oldest files. Hoping for a better way.
> 
> Any ideas?
> 
> As a side note, online documentation suggests this can only be
> deleted when SIP is disabled (as it is now); would users of Macs
> with SIP enabled experience the same issue and be unable to fix
> it without temporarily disabling SIP? That would seem like a
> major oversight to me. Automated testing is not an "edge case".
> 
> 
> ZV
> 
> [0]:
> https://support.apple.com/guide/security/rosetta-2-on-a-mac-with-apple-silicon-secebb113be1/web
> 
> [1]:
> https://apple.stackexchange.com/questions/427695/how-can-i-limit-the-disk-usage-of-the-rosetta-2-oah-cache
> 
> _______________________________________________
> cfarm-users mailing list
> cfarm-users at lists.tetaneutral.net
> https://lists.tetaneutral.net/listinfo/cfarm-users