Poor man's solution to using APC 3.1.3p1 on FreeBSD...

nospam@example.com (Sean Chittenden) — Fri, 26 Feb 2010 18:43:27 -0800

Rapid fire simple instructions to get APC 3.1.3p1 working on FreeBSD given the port only has 3.0.19.
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Linux vs. FreeBSD

nospam@example.com (Sean Chittenden) — Tue, 24 Mar 2009 10:00:00 -0700

I had a marketing "Ah ha!" moment this morning regarding &linux;'s popularity. Observe the following: Linux popularity explained

gettimeofday(2) == bad; clock_gettime(2) == good.

nospam@example.com (Sean Chittenden) — Sun, 01 Jun 2008 15:46:00 -0700

Finally, a technical post I feel worthy of commenting on.

Performance of my application changes from time(3) to gettimeofday(2). Why? -Joe Open Source Developer

Doh! Really common question and should be an FAQ at this point.... or it is, but an under-published FAQ that only the performance wonks seem to know or run into as an issue. In short, gettimeofday* == EBAD && clock_gettime* == EGOOD. I think the best discussion on this is PHK's post titled Timers and timing, was: MySQL Performance 6.0rc1. Please read. Essentially, FreeBSD*'s gettimeofday* syscall is monotonic, highly accurate and precise, and Linux's is not. Therefore, Linux's gettimeofday* syscall is faster and less accurate than FreeBSD*'s. I happen to agree that gettimeofday* should be monotonic and I take issue with Linux*'s gettimeofday* implementation. Monotonic time keeping requires CPU synchronization (which gettimeofday* does under FreeBSD* and should be done under all operating systems) and will always be slow as a result. Most applications that do not require precise time synchronization across threads and CPUs should use clock_gettime* with a clock_id of CLOCK_REALTIME_FAST. Few applications actually need highly precise, highly accurate, monotonic time measurement and instead can skid by with highly precise, accurate, but non-monotomic time keeping. And now you know.

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Personal Musings for Public Consumption - FreeBSD

Poor man's solution to using APC 3.1.3p1 on FreeBSD...

Linux vs. FreeBSD

gettimeofday(2) == bad; clock_gettime(2) == good.