Hello Peter,
On 30/09/16 00:13, Peter Dufault wrote:
I’m moving an older application to 4.12 and having performance issues compared
to “4.11” (aka “4.10.99”) from around 2012.
what do you mean with performance issues? Which 4.12 version do you use
exactly?
I have pthreads that are showing up as DFLT and PRIO in the “pthread” command
in the shell. For example, here:
---
[/] # pthread
ID NAME CPU PRI STATE MODESEVENTS WAITID WAITQUEUE
--
0b0100010 253 SUSP P:T:nA NONE [DFLT]
0b010002 grid 0 128 Wsem P:T:nA NONE 1a010006 00262a78 [PRIO]
0b010003 sokmon 0 55 Wsysev P:T:nA NONE [DFLT]
0b010004 sokmon 0 129 Wsysev P:T:nA NONE [DFLT]
0b010005 tmsync 0 129 DELAY:Wisig P:T:nA NONE 00236260
[FIFO]
0b010006 log 0 129 Wsem P:T:nA NONE 3b010001 00275588 [FIFO]
0b010007 fset 0 129 Wsem P:T:nA NONE 3b01001e 00275a10 [FIFO]
0b010008 frm 0 25 Wsem P:T:nA NONE 3b010003 002755d8 [FIFO]
0b010009 publsh 0 128 Wjatx P:T:nA NONE [DFLT]
0b01000a frm 0 25 Wsem P:T:nA NONE 3b010007 00275678 [FIFO]
0b01000b publsh 0 128 Wjatx P:T:nA NONE [DFLT]
0b01000c ss_srv 0 128 Wsysev P:T:nA NONE [DFLT]
0b01000d muxmon 0 128 Wsem P:T:nA NONE 1a010016 00262ef8 [PRIO]
0b01000e commute 0 1 Wsem P:T:nA NONE 3b01000b 00275718 [FIFO]
0b01000f servo0 17 Wsem P:T:nA NONE 3b010013 00275858 [FIFO]
0b010011 tclsrv 0 55 Wsysev P:T:nA NONE [DFLT]
[/] #
---
I started everything all pthreads with the SCHED_FIFO policy (I have a single
wrapper around pthread_create() that I use), and I’m guessing this field has
nothing to do with that. Some are now DFLT and PRIO.
I note that both WAITID and WAITQUEUE are always 0 in the DFLT case.
- Does PRIO mean the priority is boosted? I don’t expect that, especially for
the “muxmon” or “sokmon” threads.
- What does DFLT mean?
[DFLT] means this thread doesn't wait on a thread queue
[FIFO] means it waits on a thread queue in FIFO order
[PRIO] means it waits on a thread queue in priority order
The integer is the thread queue pointer value.
Peter
-
Peter Dufault
HD Associates, Inc. Software and System Engineering
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