今天用到了控制gcc內(nèi)存使用的參數(shù)

net_robber

在一些特殊環(huán)境中需要用到這些參數(shù)，否則gcc拼命申請(qǐng)內(nèi)存

1.           ggc-min-expand
   
2.                GCC uses a garbage collector to manage its own memory alloca-
   
3.                tion.  This parameter specifies the minimum percentage by which
   
4.                the garbage collector’s heap should be allowed to expand
   
5.                between collections.  Tuning this may improve compilation
   
6.                speed; it has no effect on code generation.
   
7. 
   
8.                The default is 30% + 70% * (RAM/1GB) with an upper bound of
   
9.                100% when RAM >= 1GB.  If "getrlimit" is available, the notion
   
10.                of "RAM" is the smallest of actual RAM and "RLIMIT_DATA" or
    
11.                "RLIMIT_AS".  If GCC is not able to calculate RAM on a particu-
    
12.                lar platform, the lower bound of 30% is used.  Setting this
    
13.                parameter and ggc-min-heapsize to zero causes a full collection
    
14.                to occur at every opportunity.  This is extremely slow, but can
    
15.                be useful for debugging.
    
16. 
    
17.            ggc-min-heapsize
    
18.                Minimum size of the garbage collector’s heap before it begins
    
19.                bothering to collect garbage.  The first collection occurs
    
20.                after the heap expands by ggc-min-expand% beyond ggc-min-heap-
    
21.                size.  Again, tuning this may improve compilation speed, and
    
22.                has no effect on code generation.
    

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bluesea666

mark

fender0107401

還有這個(gè)事情，挺新鮮的。