slowdown because of gettimeofday change between 9.2 and 10?
freebsd-questions-local at be-well.ilk.org
Sat Feb 22 20:36:32 UTC 2014
Matthias Apitz <guru at unixarea.de> writes:
> El día Saturday, February 22, 2014 a las 06:16:03PM +0100, Matthias Apitz escribió:
>> > 2) I checked on another system which runs the same application, but
>> > under 9.2. It turns out that the application issues the same calls to
>> > gettimeofday, also on a continuous basis, and, furthermore the numbers
>> > of calls on the two systems over a period of 15 seconds are almost the same.
>> > So there must be some other difference between 9.2 and 10.0 that causes
>> > the slowdown.
>> In my case it is:
>> $ uname -a
>> FreeBSD La-Habana 10.0-CURRENT FreeBSD 10.0-CURRENT #0 r250588M: Sat
>> Jun 22 14:15:48 CEST 2013
>> guru at La-Habana:/usr/obj/usr/home/guru/head/src/sys/GENERIC i386
>> The app in question (kabc) was compiled based on the ports at this time.
> $ truss -f -o tr kaddressbook
> kdecore (KAction): WARNING: KActionCollection::KActionCollection(
> QObject *parent, const char *name, KInstance *instance )
> $ fgrep gettimeofday tr | wc -l
FreeBSD has *always* had a slower (but, it looks like, more accurate)
gettimeofday() implementation than some other systems. This is an
infamous slowdown for Java.
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