Re: #1650: Empty program will sometimes do a major GC, sometimes not - figure out why

[Chicken Trac]

#1650: Empty program will sometimes do a major GC, sometimes not - figure out 
why
---------------------------------------+----------------------
            Reporter:  sjamaan         |      Owner:  sjamaan
                Type:  task            |     Status:  assigned
            Priority:  major           |  Milestone:  5.3
           Component:  core libraries  |    Version:  5.1.0
          Resolution:                  |   Keywords:
Estimated difficulty:  medium          |
---------------------------------------+----------------------

Comment (by sjamaan):

 Here's a log of a quick test I did just now, showing how random it really
 is:

 {{{
 $ ~/chickens/chicken-5/bin/csc -version
 CHICKEN
 (c) 2008-2021, The CHICKEN Team
 (c) 2000-2007, Felix L. Winkelmann
 Version 5.2.1 (rev 01b254c2)
 linux-unix-gnu-x86-64 [ 64bit dload ptables ]
 $ ~/chickens/chicken-5/bin/csc empty.scm
 $ ./empty -:g
 $ ./empty -:g
 [GC] Heap high water mark hit, growing...
 [GC] (old) fromspace:   start=0x00007f67500ef010,
 limit=0x00007f675016f010
 [GC] (old) tospace:     start=0x00007f675006e010,
 limit=0x00007f67500ee010
 [GC] resized heap to 3145728 bytes
 [GC] (new) fromspace:   start=0x00007f674feed010,
 limit=0x00007f675006d010
 [GC] (new) tospace:     start=0x00007f674fd6c010,
 limit=0x00007f674feec010
 [GC] level  1   gcs(minor)  0   gcs(major)  1
 [GC] stack      0x00007ffe554e15d0      0x00000000554e1dd0
 0x00007ffe555e15d0
 [GC]  from      0x00007f674feed010      0x00007f674ff26188
 0x00007f675006d010      0x0000000000039178
 [GC]    to      0x00007f674fd6c010      0x00007f674fd6c010
 0x00007f674feec010
 [GC] 0 locatives (from 32)
 $ ./empty -:g
 $ ./empty -:g
 $ ./empty -:g
 $ ./empty -:g
 $ ./empty -:g
 $ ./empty -:g
 $ ./empty -:g
 $ ./empty -:g
 $ ./empty -:g
 $ ./empty -:g
 $ ./empty -:g
 [GC] Heap high water mark hit, growing...
 [GC] (old) fromspace:   start=0x00007fd665f77010,
 limit=0x00007fd665ff7010
 [GC] (old) tospace:     start=0x00007fd665ef6010,
 limit=0x00007fd665f76010
 [GC] resized heap to 3145728 bytes
 [GC] (new) fromspace:   start=0x00007fd665d75010,
 limit=0x00007fd665ef5010
 [GC] (new) tospace:     start=0x00007fd665bf4010,
 limit=0x00007fd665d74010
 [GC] level  1   gcs(minor)  0   gcs(major)  1
 [GC] stack      0x00007fff47ec3780      0x0000000047ec3940
 0x00007fff47fc3780
 [GC]  from      0x00007fd665d75010      0x00007fd665dae188
 0x00007fd665ef5010      0x0000000000039178
 [GC]    to      0x00007fd665bf4010      0x00007fd665bf4010
 0x00007fd665d74010
 [GC] 0 locatives (from 32)
 }}}

-- 
Ticket URL: <https://bugs.call-cc.org/ticket/1650#comment:6>
CHICKEN Scheme <https://www.call-cc.org/>
CHICKEN Scheme is a compiler for the Scheme programming language.