‐‐‐‐‐‐‐ Original Message ‐‐‐‐‐‐‐ On Thursday, 3 December 2020 19:28, Marco Antoniotti marco.antoniotti@unimib.it wrote:
Don't the latest incarnations of ECL use the Bohem GC?
They do, we plan to resurrect the homegrown gc as an alternative though.
Regards, Daniel
Just asking...
MA
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From: pro pro-bounces@common-lisp.net on behalf of Martin Cracauer cracauer@cons.org
Sent: Thursday, December 3, 2020 6:25:50 PM
To: Discussion list for Common Lisp professionals pro@common-lisp.net
Subject: Re: Call for Interest: Clojure (or Lisp?) Code Camp with BLM focus Pascal Costanza wrote on Thu, Dec 03, 2020 at 04:17:56PM +0100:
Parallel GC is no problem and implemented.
Which CL implementations have a parallel GC?
Clasp (via Boehm GC and MPS).
I thought SBCL was there, but I just checked, not yet. I think Google is pushing for a parallel GC instead, because of response times to their production monitoring.
Another untapped source of performance is userfaultfd(2) in the Linux kernel. It allows those GCs that implement a write barrier using page protections SIGSEGV to use the faster userfaultfd interface instead (as opposed to those using a bitmap). This won't help concurrent GC, but parallel GC would benefit even more than single-thread GC because it uses faster system calls. Proof of concept is here: https://www.cons.org/cracauer/cracauer-userfaultfd.html
Martin
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% Martin Cracauer cracauer@cons.org http://www.cons.org/cracauer/