Argonne National Laboratory

Experimental Physics and
Industrial Control System

2002  2003  2004  2005  2006  2007  2008  2009  2010  2011  2012  2013  2014  2015  2016  2017  2018  2019  <20202021  Index 2002  2003  2004  2005  2006  2007  2008  2009  2010  2011  2012  2013  2014  2015  2016  2017  2018  2019  <20202021 
<== Date ==> <== Thread ==>

Subject: Re: [Merge] ~freddie-akeroyd/epics-base:fix_win32_monotonic_time into epics-base:7.0
From: Freddie Akeroyd via Core-talk <core-talk at aps.anl.gov>
To: mp+391018 at code.launchpad.net
Date: Tue, 29 Sep 2020 23:26:23 -0000
Hi, I wasn't quite sure how osdMonotonicResolution got used and I didn't know if I could guarantee that 1e9 / freq would always be an integer multiple, so I though it safest to round up so as not to promise a resolution that was not possible. However if returning 101ns rather than 100ns causes issues then the logic could be changed to check for an exact integer multiple and not add 1 in those cases.

@Micahel I have found PerfCounter quite good on a VM - that was originally how I started using it years ago as the normal clock on our VMs was pretty bad and kept losing time and then being corrected and jumping, but the performance counter seemed to come directly from the real hardware hosting the VM and so was very stable.

-- 
https://code.launchpad.net/~freddie-akeroyd/epics-base/+git/epics-base/+merge/391018
Your team EPICS Core Developers is subscribed to branch epics-base:7.0.

References:
[Merge] ~freddie-akeroyd/epics-base:fix_win32_monotonic_time into epics-base:7.0 Freddie Akeroyd via Core-talk

Navigate by Date:
Prev: Re: [Merge] ~freddie-akeroyd/epics-base:fix_win32_monotonic_time into epics-base:7.0 Freddie Akeroyd via Core-talk
Next: epics-pva2pva-linux32 - Build # 195 - Unstable! APS Jenkins via Core-talk
Index: 2002  2003  2004  2005  2006  2007  2008  2009  2010  2011  2012  2013  2014  2015  2016  2017  2018  2019  <20202021 
Navigate by Thread:
Prev: Re: [Merge] ~freddie-akeroyd/epics-base:fix_win32_monotonic_time into epics-base:7.0 Freddie Akeroyd via Core-talk
Next: Re: [Merge] ~freddie-akeroyd/epics-base:fix_win32_monotonic_time into epics-base:7.0 mdavidsaver via Core-talk
Index: 2002  2003  2004  2005  2006  2007  2008  2009  2010  2011  2012  2013  2014  2015  2016  2017  2018  2019  <20202021 
ANJ, 30 Sep 2020 Valid HTML 4.01! · Home · News · About · Base · Modules · Extensions · Distributions · Download ·
· Search · EPICS V4 · IRMIS · Talk · Bugs · Documents · Links · Licensing ·