On Tue, Feb 16, 2016 at 3:50 AM, Andres Freund <and...@anarazel.de> wrote: > On 2016-02-16 09:13:09 +0100, Andres Freund wrote: >> What we do we think the resolution is on modern >> >systems? I would not have guessed that to be inaccurate. >> >> Depends in a lot of factors. The biggest being how busy you're system >> is. On an mostly idle system (i.e. workout so CPUs being >> overcommitted) you can get resolutions considerably below one >> millisecond. HPET can get you very low latencies, making OS scheduling >> latencies the dominant factor, but one that can be tuned. > > To back up my claim on this, read man 7 time > (e.g. http://linux.die.net/man/7/time), especially "The software clock, > HZ, and jiffies" and "High-resolution timers". To quote the most salient > point:
Interesting, thanks. -- Robert Haas EnterpriseDB: http://www.enterprisedb.com The Enterprise PostgreSQL Company -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
