During the BSDCan & DevSummit I got interested in finding out why blogbench is so slow on FreeBSD. After talking to jhb, it looked like one of the reasons might be that opening files with O_RDWR or O_WRONLY (anything opening the file for writing) is serialized.
To check this, I've written a small test program, which I've run on CentOS 6.3 and FreeBSD 10-HEAD on the same hardware. Here are the results: https://wiki.freebsd.org/Benchmarking/OpenCloseBenchmark Conclusions: * Linux opens and closes files much faster than FreeBSD * Linux does not serialize write-open operations, while FreeBSD does * Even with O_RDONLY, FreeBSD is much slower in opening (and closing) files. I'd welcome a review of these results and comments. _______________________________________________ [email protected] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-hackers To unsubscribe, send any mail to "[email protected]"
