On 06Apr2012 08:51, I wrote: | On 06Apr2012 00:27, Victor Stinner <victor.stinner@gmail.com> wrote: | | By the way, I removed ("deferred") the time.highres() function from the | | PEP, | | Chuckle; was not the whole PEP for a high res clock? Gah. I see it was for montonic, not high res. Sorry. [...] | I can think of definitions of "steady" that I personally would accept, | and they'd accept that suspend/resume would be concealed (I guess I | would usually want - purely myself here - a clock representing system | run time; I'd go for time.time() for wall clock). | | | So which flags do you want to support? (only "monotonic"?) | | I'd stay with my current list, with metadata in the clock objects | indicating what _flavour_ of "steady" or "high res" they present. On reflection, since I have historically presumed time.time() on UNIX mapped to "man 2 time", I clearly think that time.time() is wall clock time, and may jump when the sysadmin notices it is incorrect (of course this is often mediated by NTP, which in turn is usually mediated by some ntpd using adjtime(), which slews instead of jumping). But it might jump. (I'm intending to jump a wayard VM today, in fact:-) So guess I expect time.time() to be only usually steady. And usually monotonic. So having neither flag. Do I want a WALLCLOCK flag? Meaning a clock that is supposed to be real world time (did I see REALTIME in one of your examples?), and may be almost arbirarily corrected to be made real world if it is wrong. Maybe. +0 on that I think. Basicly I'm distinguishing here between a clock used for timestamps, for example in log entries, and a clock used for measuring elapsed system run time, for example in benchmarking. I would want to log entries to match what a clock on the wall should say. So I think I'm _still_ for the three original flags I suggested (monotonic, high res, steady) and expect time.time() to not necessarily meet any of them. But to meet a hypothetical WALLCLOCK flag. Regarding UNIX time(2) (or POSIX time(3)), POSIX says: The time() function shall return the value of time in seconds since the Epoch. and the epoch is a date. So UNIX time() should be a wall clock. Python "help(time.time)" says: Return the current time in seconds since the Epoch. So I think it should also be a wall clock by that same reasoning. Cheers, -- Cameron Simpson <cs@zip.com.au> DoD#743 http://www.cskk.ezoshosting.com/cs/ Uh, this is only temporary...unless it works. - Red Green