Followup: DUV4.0 memory tuning - HELP

From: Joe Spanicek <joe_at_resptk.bhp.com.au>
Date: Mon, 13 Jan 1997 09:59:11 +1100

Hi Again,

Several people responded - asking what the error is from
the compiler 'cc'.

There is no error !! It just keeps on compiling with a lot
of paging going on with the disk's.

On a DEC3000/300 with 96Meg memory running DU3.0 - it manages
to compile this same code without a problem. So there is a
difference between the 2 systems.

I did a diff of 'sysconfig -q vm' for both systems:

diff 255 3000

1d0
< vm:
4c3
< ubc-borrowpercent = 20

---
> ubc-borrowpercent = 10
5a5
> ubc-wait-for-io = 0
12a13,14
> vm-anonklshift = 17
> vm-anonklpages = 1
33,44d34
< vm-page-prewrite-target = 256
< dump-user-pte-pages = 0
< kernel-stack-guard-pages = 1
< vm-min-kernel-address = 18446744071562067968
< contig-malloc-percent = 20
< vm-aggressive-swap = 0
< new-wire-method = 1
< vm-segment-cache-max = 50
< vm-page-lock-count = 0
< gh-chunks = 0
< gh-min-seg-size = 8388608
< gh-fail-if-no-mem = 1
Can anyone other any further insight ??
Joe Spanicek
The original message is given below:
----------------------------------------------------------------
I am using a memory debugger application, Insure++, which I am using
to debug some code. Insure++ examines the code and makes a subsequent
code file which it compiles instead. For one file it produces a 3.5Meg
c-code which it trys to compile.
The problem been it is causing havoc on the DU4.0 Alpha 255/233 system
which it is compiling on. It can not handle compiling the big file.
I have some stats on the problem - given below. It appears I need to tune
the memory performance on the system.
Ive been through the documentation but am not sure what I should change and
how in the memory/ubs sybsystem.
If there are any gurus with system tuning skills - any pointers/directions
will be greatly appreciated.
Thanks
Joe Spanicek
joe_at_resptk.bhp.com.au
System
------
Alpha 255/233 DU V4.0 386 alpha
128Mbyte memory
top output
----------
load averages:   0.08,  0.19,  0.24                                    09:44:14
75 processes:  3 running, 21 sleeping, 50 idle
Cpu states:  1.7% user,  0.0% nice, 12.7% system, 85.6% idle
Memory: Real: 45M/123M act/tot  Virtual: 202M/376M use/tot  Free: 248K
  PID USERNAME PRI NICE  SIZE   RES STATE   TIME    CPU COMMAND
 8096 joe       44    0  128M   89M run     9:27  5.20% gemc_cc
swapon -s
---------
Swap partition /dev/rz3b (default swap):
    Allocated space:        25088 pages (196MB)
    In-use space:           13026 pages ( 51%)
    Free space:             12062 pages ( 48%)
Swap partition /dev/rz0b:
    Allocated space:        23146 pages (180MB)
    In-use space:            9806 pages ( 42%)
    Free space:             13340 pages ( 57%)
Total swap allocation:
    Allocated space:        48234 pages (376MB)
    Reserved space:         27111 pages ( 56%)
    In-use space:           22832 pages ( 47%)
    Available space:        21123 pages ( 43%)
vmstat 1
--------
Virtual Memory Statistics: (pagesize = 8192)
  procs    memory         pages                          intr        cpu        
  r  w  u  act  free wire fault cow zero react pin pout  in  sy  cs  us  sy  id
  2 84 17   13K   22 1648  305    0   75   10  230    0 718 542  1K   2  13  85
  3 83 17   13K   26 1648  273    0   75   21  197    0 585 537  1K   3  11  86
  4 82 17   13K   33 1648  272    0   75   21  197    2 746 335  1K   1  11  87
  3 83 17   13K   36 1648  344    0   75    2  269    0 788 379  1K   2  15  83
  3 83 17   13K   25 1650  363    0   75    6  288    0 645 409  1K   1  13  86
  3 83 17   13K   38 1650  293    0   75   88  199    0 709 498  1K   3  13  84
  3 83 17   13K   36 1650  327    0   75  144  252    0 740 385  1K   3  13  85
  4 82 17   13K   38 1650  345    0   75   41  270    1 802 482  1K   3  13  84
  4 82 17   13K   37 1658  356    0   75   49  281    4 719  2K  1K   3  13  85
  3 83 17   13K   35 1656  324    0   75   36  246   10 658  1K  1K   4  15  81
  4 82 17   13K   47 1656  480    0   75   29  405    8 578  1K  1K   5  15  79
  4 82 17   13K   36 1656  344    0   75    6  269    0 738 673  1K   7  14  79
  2 84 17   13K   33 1656  269    0   75    1  194    0 687 356  1K   3  11  86
  3 83 17   13K   35 1654  312    0   75    3  237    0 667 849  1K  13  16  71
  2 84 17   13K   25 1658  280    0   75    2  201    0 532 813  1K  14  12  74
  3 83 17   13K   29 1658  324    0   75   11  249    1 764 348  1K   1  13  85
  3 83 17   13K   27 1658  325    0   75    2  250    0 673 264  1K   1  10  89
  4 82 17   13K   38 1658  317    0   75    1  242    0 719 319  1K   1  12  87
  3 83 17   13K   20 1656  322    0   75    4  247    0 635 490  1K   2  13  85
  4 82 17   13K   29 1656  321    0   75    0  246    3 920 447  1K   2  15  83
  3 83 17   13K   27 1656  317    0   75    9  242    0 700 363  1K   3  13  84
iostat 1
--------
      tty     rz0      rz1      rz3      dk3     cpu
 tin tout bps tps  bps tps  bps tps  bps tps  us ni sy id
   1   62  51   6   36   6   88  12    0   0  15  0  5 80
   0  230 829 102    0   0 1020 124    0   0   1  0  9 90
   0  1181292 162    0   0  686  86    0   0   1  0  8 91
   0  1171162 145    0   0  820 102    0   0   1  0  9 90
   0  1181532 191    0   0  343  43    0   0   1  0  7 92
   0  117 970 121    0   0  905 118    0   0   1  0  8 91
   0  1081182 145    0   0  629  78    0   0   1  0  8 91
   0  113 822 103    0   0 1537 192    0   0   1  0  8 91
   0  1181387 173    0   0  582  73    0   0   1  0  9 90
   0  1181196 149    0   0  838 105    0   0   1  0  9 90
   0  1181315 164    0   0  773  97    0   0   1  0 10 89
   0  111 857 107    0   0 1263 156    0   0   1  0  9 91
   0  113 976 122    0   0 1283 160    0   0   1  0  7 92
   0  118 446  56    0   0 1809 226    0   0   1  0  9 89
   0  118 781  98    0   0 1387 173    0   0   1  0  9 90
   0  1181155 144    0   0  877 117    0   0   1  0 11 89
   0  1071216 149    0   0  637  78    0   0   1  0  9 90
   0  115 656  81    0   0 1632 204    0   0   1  0  8 91
   0  118 582  73    0   0 1697 212    0   0   1  0 10 89

Received on Mon Jan 13 1997 - 00:12:44 NZDT