Ruby Issue Tracking System

01/20/2021

08:25 PM Ruby master Feature #17566 (Open): Tune thread QoS / efficiency on macOS

Hi, new Apple M1 processors have "performance" and "efficiency" cores. Apple provides a QoS API so threads can tune w... mperham (Mike Perham)

08/01/2018

12:55 AM Ruby master Feature #14718: Use jemalloc by default?

Sam, I'm ok with your suggestion, any progress here is welcome. The main issue with tcmalloc is that Ruby doesn't su... mperham (Mike Perham)

05/23/2018

04:22 AM Ruby master Feature #14718: Use jemalloc by default?

> Ideally I would like a new Ruby runtime flag --long-lived that was tuned for long run times (e.g low malloc arena c... mperham (Mike Perham)

05/22/2018

08:22 PM Ruby master Feature #14718: Use jemalloc by default?

If jemalloc 5.1.0 is using too much memory, you can tune its arenas in the same way as glibc:
~~~
MALLOC_CONF=nar... mperham (Mike Perham)

04:25 PM Ruby master Feature #14718: Use jemalloc by default?

Another graph from a production Rails app:
https:/... mperham (Mike Perham)

05/20/2018

05:58 PM Ruby master Feature #14759: [PATCH] set M_ARENA_MAX for glibc malloc

Yusuke, your script doesn't create any memory fragmentation, it throws away everything after 1600 and reads the exact... mperham (Mike Perham)

05/18/2018

03:49 AM Ruby master Feature #14718: Use jemalloc by default?

Dennis, your results match my results (Ubuntu 18.04, gcc 7.3, glibc 2.27). jemalloc 3.6 is slow but space efficient.... mperham (Mike Perham)

05/17/2018

05:31 PM Ruby master Feature #14718: Use jemalloc by default?

Yusuke, I'm not sure, I can't explain that. It does get worse as the machine gets larger. A machine with more cores... mperham (Mike Perham)

05/16/2018

08:12 PM Ruby master Feature #14718: Use jemalloc by default?

Yeah, it seems that way. Those results are with jemalloc 3.6.0 (which is what Ubuntu ships), a version 4 years old. ... mperham (Mike Perham)

06:45 PM Ruby master Feature #14718: Use jemalloc by default?

I've created a script which attempts to reproduce memory fragmentation.
~~~
=begin
This script attempts to repro... mperham (Mike Perham)