Re: [Sbcl-help] GENCGC-PAGE-SIZE maxed out?

[Benjamin L. <ben...@cm...>]

>> * //testing for consistency of first and second GENESIS passes
>> //header files match between first and second GENESIS -- good
>>
>> real	13m0.960s
>> user	4m32.852s
>> sys	0m9.967s
>> //entering make-target-2.sh
>> //doing warm init - compilation phase
>> fatal error encountered in SBCL pid 16153:
>> GC invariant lost, file "gencgc.c", line 4503
>
> A quick look into gencgc.c reveals that the heap size should be
> divisible by PAGE_BYTES (that, with gencgc, is equal to
> GENCGC_PAGE_BYTES).
>
>    /* Compute the number of pages needed for the dynamic space.
>     * Dynamic space size should be aligned on page size. */
>    page_table_pages = dynamic_space_size/PAGE_BYTES;
>    gc_assert(dynamic_space_size == npage_bytes(page_table_pages));

I wasn't sure exactly which parameter specifies PAGE_BYTES, but I  
tried compiled again with the following in backend-parms.lisp:

(setf *backend-page-size* 65536)
(def!constant gencgc-page-size 65536)

Compilation finishes OK with these parameters

But then another error shows up when running (below). This time, I  
noticed that when I started SBCL the process was only allocated 4GB of  
memory (previously was 8GB). And this time the error appeared when the  
memory consumption was close to 4GB.

ERROR:

Heap exhausted during garbage collection: 256 bytes available, 272  
requested.
Gen StaPg UbSta LaSta LUbSt Boxed Unboxed LB   LUB  !move  Alloc   
Waste   Trig
  WP  GCs Mem-age
  0:     0     0     0     0     0     0     0     0     0         
0     0  2000
000    0   0  0.0000
  1:     0     0     0     0     0     0     0     0     0         
0     0  2000
000    0   0  0.0000
  2:     0     0     0     0     0     0     0     0     0         
0     0  2000
000    0   0  0.0000
  3: 18702 19623     0     0  2316  1559     0     0     0 253304736  
647264 367
902928    0   1  1.4445
  4: 65533 64042     0     0 10721  6663  1731  1539    10 1350800224  
2780320 7
78330752 9602   1  1.3438
  5: 56837 57662     0     0 21457 15654  1569  1745    25 2643916288  
5376512 2000000 22023   0  0.5391
  6:     0     0     0     0   581     0     0     0     0  
38076416     0  2000
000  535   0  0.0000
  Total bytes allocated=4286097664
GC control variables:
         *GC-INHIBIT* = false
         *GC-PENDING* = true
fatal error encountered in SBCL pid 23666:
Heap exhausted, game over.