Playing with MDB ::ps dcmd I noticed that the status field interpretation is
different from the regular ps(1) command. The status in MDB is the value of
pr.p_stat field which, according to the code may only have values SRUN, SIDL
and SZOMB. The code in MDB pretends to understand other states:
static char
pstat2ch(uchar_t state)
{
switch (state) {
case SSLEEP: return ('S');
case SRUN: return ('R');
case SZOMB: return ('Z');
case SIDL: return ('I');
case SONPROC: return ('O');
case SSTOP: return ('T');
default: return ('?');
}
}
The ps(1) and prstat(1M) get process state from psinfo_t pr_sname field which
is based on thread state for the representative lwp and which may be different
from p_stat field.
The MDB implementation is quite simple since it just reads p_stat field from
the process structure and doesn't need to simulate any translations done by
/proc.
The question, though is whether such discrepancy is by design or by accident?
- Alex Kolbasov
__
http://blogs.sun.com/akolb
