On Dec 13, 2007 4:07 AM, Shantanu Ghosh <[EMAIL PROTECTED]> wrote: > Hi, > > I am running FreeBSD 7.0 Beta1 and Linux FC6 on two identical pieces of > hardware - Dell poweredge with intel core2 duo. Each system has 4 CPUs. > > Now, in simple memory access operations, I see the freebsd system being > noticably slower than the linux system. A simple C program that copies > from one memory buffer to another, when executed in a loop executes > between 10-30% slower on freebsd, as compared to linux. The assembly > code of the program used for testing is identical in both the cases. > > One observation is that freebsd system performance decreases as the > size of the buffer increases. If the buffer is under 1k, both the > sytems give the same performance. freebsd performance is about 10% > slower if the buffer size is around 4k, and about 30% slower if the > buffer is around 1Mb. A benchmark like sysbench memory read operation > performs miserably on the freebsd system, compared to linux. > > As far as I can see, the BIOS settings are identical on both the > machines. Any idea what could be going on?
Are you running with ULE or 4BSD? Have you checked that the BIOS cache settings are identical? -Kip _______________________________________________ freebsd-performance@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-performance To unsubscribe, send any mail to "[EMAIL PROTECTED]"
