On Sat, 30 Dec 2000, Adam Langley wrote:
> Some basic MM info:
>
> When a process fork()'s (vfork()'s or whatever)
> it's page tables are copied and the pages of the new process are
> marked as COW (Copy On Write). If the new process writes to any
> of it's pages the kernel handles a page fault, copies the page and
> maps it back in. The pratical effect being that all memory which
> can be shared, is shared and fork() is fast.
>
> Now - if you malloc 10MB of memory and fork() you will show up as
> using 20MB of memory, even thou 10MB is actually used. Since fred
> has so many threads, this could be really screwing the memory
> use figures.
AFAIK top understands all this.
PID USER PRI NI SIZE RSS SHARE STAT LIB %CPU %MEM TIME COMMAND
28558 root 9 0 27048 26M 1588 S 0 0.0 21.4 0:17 java
28563 root 9 0 27048 26M 1588 S 0 0.0 21.4 0:00 java
28564 root 9 0 27048 26M 1588 S 0 0.0 21.4 0:00 java
28565 root 9 0 27048 26M 1588 S 0 0.0 21.4 0:00 java
28566 root 9 0 27048 26M 1588 S 0 0.0 21.4 0:00 java
28567 root 9 0 27048 26M 1588 S 0 0.0 21.4 0:00 java
28568 root 9 0 27048 26M 1588 S 0 0.0 21.4 0:01 java
28602 root 9 0 27048 26M 1588 S 0 0.0 21.4 0:00 java
28603 root 9 0 27048 26M 1588 S 0 0.0 21.4 0:00 java
28604 root 9 0 27048 26M 1588 S 0 0.0 21.4 0:00 java
28605 root 9 0 27048 26M 1588 S 0 0.0 21.4 0:00 java
28606 root 9 0 27048 26M 1588 S 0 0.0 21.4 0:00 java
28607 root 9 0 27048 26M 1588 S 0 0.0 21.4 0:00 java
28608 root 9 0 27048 26M 1588 S 0 0.0 21.4 0:00 java
28615 root 9 0 27048 26M 1588 S 0 0.0 21.4 0:01 java
28682 root 9 0 27048 26M 1588 S 0 0.0 21.4 0:00 java
28688 root 9 0 27048 26M 1588 S 0 0.0 21.4 0:00 java
28709 root 9 0 27048 26M 1588 S 0 0.0 21.4 0:00 java
28711 root 9 0 27048 26M 1588 S 0 0.0 21.4 0:00 java
28733 root 9 0 27048 26M 1588 S 0 0.0 21.4 0:00 java
28762 root 9 0 27048 26M 1588 S 0 0.0 21.4 0:00 java
28773 root 10 0 27048 26M 1588 S 0 2.2 21.4 0:00 java
28807 root 9 0 27048 26M 1588 S 0 0.0 21.4 0:00 java
28842 root 9 0 27048 26M 1588 S 0 0.0 21.4 0:00 java
Right? (My node has only been running for maybe five minutes, hence the
low memory consumption. Before I killed it it was eating 56%.)
--
Mark Roberts
[EMAIL PROTECTED]
_______________________________________________
Freenet-dev mailing list
[EMAIL PROTECTED]
http://lists.sourceforge.net/mailman/listinfo/freenet-dev
