Messages in this thread | | | Date | Fri, 02 Apr 1999 12:03:24 -0800 | From | Nate Eldredge <> | Subject | Confusion: Process size from /proc/XX/status vs. /proc/XX/statm |
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I notice that both /proc/XX/status and /proc/XX/statm both provide a field for process size. VmSize for the former, the first value for the latter (as apparently stated by Documentation/proc.txt). However, they don't match (and yes, I know one is K and the other pages).
For example, here is the output of each. It may or may not be relevant that the process in question had a lot of pages protected PROT_NONE.
unixbox:~/progs/yamd$ cat /proc/1271/status Name: cc1 State: T (stopped) Pid: 1271 PPid: 1270 Uid: 1004 1004 1004 1004 Gid: 100 100 100 100 Groups: 100 5 6 11 101 102 103 107 110 VmSize: 132652 kB VmLck: 0 kB VmRSS: 45416 kB VmData: 129536 kB VmStk: 52 kB VmExe: 2044 kB VmLib: 976 kB SigPnd: 0000000000000000 SigBlk: 0000000000000000 SigIgn: 0000000000000000 SigCgt: 0000000000001480 CapInh: 00000000fffffeff CapPrm: 0000000000000000 CapEff: 0000000000000000 unixbox:~/progs/yamd$ cat /proc/1271/statm 16835 11354 577 442 0 10912 10777
Note that 16835 * 4 = 67340 != 132652.
So I'm confused. Should the two be equal and it's a bug that they aren't, or are they intended to measure different things? If the latter, what are the semantics of each?
TIA --
Nate Eldredge nate@cartsys.com
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