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.
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https://code.launchpad.net/~freddie-akeroyd/epics-base/+git/epics-base/+merge/391018
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