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5.1.71 memory
Syntax:
memory ( int_expression )
Type:
- int
Purpose:
- returns statistics concerning the memory management:
memory(0) is the number of active (used) bytes,
memory(1) is the number of bytes allocated from the
operating system,
memory(2) is the maximal number of bytes ever allocated from the
operating system during the current SINGULAR session.
Note:
- To monitor the memory usage during ongoing computations the option
mem should be set (using the command option(mem); , see
also option).
Example:
| ring r=0,(x(1..500)),dp;
poly p=(x(1)+x(500))^50;
proc ReportMemoryUsage()
{ "Memory currently used by SINGULAR :",memory(0),"Byte (",
memory(0)/1023, "KByte)" +newline+
"Memory currently allocated from system:",memory(1), "Byte (",
memory(1)/1023, "KByte)";
"Maximal memory allocated from system :",memory(2), "Byte (",
memory(2)/1023, "KByte)";
}
ReportMemoryUsage();
==> Memory currently used by SINGULAR : 205404 Byte ( 200 KByte)
==> Memory currently allocated from system: 671112 Byte ( 656 KByte)
==> Maximal memory allocated from system : 671112 Byte ( 656 KByte)
kill p;
ReportMemoryUsage(); // less memory used: p killed
==> Memory currently used by SINGULAR : 152168 Byte ( 148 KByte)
==> Memory currently allocated from system: 671112 Byte ( 656 KByte)
==> Maximal memory allocated from system : 671112 Byte ( 656 KByte)
kill r;
ReportMemoryUsage(); // even less memory: r killed
==> Memory currently used by SINGULAR : 141588 Byte ( 138 KByte)
==> Memory currently allocated from system: 671112 Byte ( 656 KByte)
==> Maximal memory allocated from system : 671112 Byte ( 656 KByte)
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See
option;
system.
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