Is there any programmatic way to retrieve the load of the system on QNX
6 (such as returned by uptime)? I don’t see functions such as
kstat_open() or pstat_getdynamic()… ?
–
Paul D. Smith <pausmith@nortelnetworks.com> HASMAT–HA Software Mthds & Tools
“Please remain calm…I may be mad, but I am a professional.” --Mad Scientist
These are my opinions—Nortel Networks takes no responsibility for them.
Paul D. Smith <pausmith@nortelnetworks.com> wrote:
Is there any programmatic way to retrieve the load of the system on QNX
6 (such as returned by uptime)? I don’t see functions such as
kstat_open() or pstat_getdynamic()… ?
Here’s the example from ClockID
id = ClockId(1, 1);
for( ;; ) {
ClockTime(id, NULL, &start);
sleep(1);
ClockTime(id, NULL, &stop);
printf(“load = %f%%\n”, (1000000000.0 - (stop-start)) / 10000000.0);
}
I would add
ClockTime( CLOCK_REALTIME, &real_start );
ClockTime( CLOCK_REALTIME, &real_stop );
around the sleep so that you can get the exact interval that the
program slept for (it’s not always going to be exactly 1000000000.0)
–
cburgess@qnx.com
Thanks.
So, there’s no historical load maintained by the system (lots of UNIX
boxes have a way to tell you the load at 1 minute ago, 5 minutes ago,
and 15 minutes ago; these values are maintained by the kernel)?
–
Paul D. Smith <pausmith@nortelnetworks.com> HASMAT–HA Software Mthds & Tools
“Please remain calm…I may be mad, but I am a professional.” --Mad Scientist
These are my opinions—Nortel Networks takes no responsibility for them.
Paul D. Smith <pausmith@nortelnetworks.com> wrote:
Thanks.
So, there’s no historical load maintained by the system (lots of UNIX
boxes have a way to tell you the load at 1 minute ago, 5 minutes ago,
and 15 minutes ago; these values are maintained by the kernel)?
No. We’re not UNIX. ;v)
But it would be trivial to make a resmgr that would do this.
Oh no, the ‘T’ word!
Colin
\
cburgess@qnx.com
%% Colin Burgess <cburgess@qnx.com> writes:
So, there’s no historical load maintained by the system (lots of UNIX
boxes have a way to tell you the load at 1 minute ago, 5 minutes ago,
and 15 minutes ago; these values are maintained by the kernel)?
cb> No. We’re not UNIX. ;v)
cb> But it would be trivial to make a resmgr that would do this.
Nah.
I’m just trying to get GNU make’s -l option to work on QNX.
–
Paul D. Smith <pausmith@nortelnetworks.com> HASMAT–HA Software Mthds & Tools
“Please remain calm…I may be mad, but I am a professional.” --Mad Scientist
These are my opinions—Nortel Networks takes no responsibility for them.
Paul D. Smith <pausmith@nortelnetworks.com> wrote:
%% Colin Burgess <> cburgess@qnx.com> > writes:
So, there’s no historical load maintained by the system (lots of UNIX
boxes have a way to tell you the load at 1 minute ago, 5 minutes ago,
and 15 minutes ago; these values are maintained by the kernel)?
cb> No. We’re not UNIX. ;v)
cb> But it would be trivial to make a resmgr that would do this.
Nah.
I’m just trying to get GNU make’s -l option to work on QNX.
QNX’s scheduling model doesn’t really match the idea of a load
average either, not entirely. We don’t do any sort of fair-share
between higher and lower priorities, we do a fully pre-emptive
scheduling.
-David
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