Date: Tue, 06 Feb 2007 15:33:50 +0100 From: Ludger Bolmerg <lbolmerg@web.de> To: freebsd-smp@freebsd.org, Ivan Voras <ivoras@fer.hr> Subject: Re: Fujitsu Siemens TX600 S3 performance issue Message-ID: <1800387665@web.de>
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> > I installed FreeBSD 6.2 on a Fujitsu Siemens TX600 S3 with 2 dual core > > Xeon processors and 4G RAM. > > > > The SMP kernel is awfully slow. make buildkernel takes about 6 hours to > > complete. When I boot a UP kernel the build completes within 12 > > minutes. I don't see any unusual message in any log file. > > First, what exactly is slower: CPUs, I/O or something else? Run a CPU > benchmark before/after (ubench is a simple one), and also a disk > benchmark (e.g. bonnie++) before/after and compare. Haven't run a benchmark yet, but a simple dd from disks results in # dd if=/dev/amrd1s1 of=/dev/null bs=1k count=10000 10000+0 records in 10000+0 records out 10240000 bytes transferred in 3.325891 secs (3078874 bytes/sec) which seems quite reasonable to me > Do you use powerd? powerd is not used > Did you change timecounters? No This looks like a Pentium4-type Xeon, did > you try toggling hyperthreading? (also in BIOS?) No, not yet > Does "vmstat -i" output > suggest an interrupt storm? This is vmstat -i after 24 minutes on an idle machine. # vmstat -i;w interrupt total rate irq14: ata0 47 0 irq16: uhci0 11435 7 irq18: uhci2 10692 7 irq23: ehci0 1 0 irq48: bge0 2569 1 irq86: amr0 11068 7 cpu0: timer 2857629 1998 cpu1: timer 2855764 1997 cpu2: timer 2854477 1996 cpu3: timer 2854477 1996 Total 11458159 8012 3:32PM up 24 mins, 1 user, load averages: 0.00, 0.00, 0.03 USER TTY FROM LOGIN@ IDLE WHAT gr172 p0 192.168.82.35 3:11PM - w _______________________________________________________________________ Viren-Scan für Ihren PC! Jetzt für jeden. Sofort, online und kostenlos. Gleich testen! http://www.pc-sicherheit.web.de/freescan/?mc=022222help
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