Mail NETvigieHi all, I buy a new DELL PowerEdge 1850 with Bi-Xeon 2.8GHZ/2*2MB Dual Core 800FSB processor, 2Go DDR2 RAM, PERC4di RAID controller with 2 SCSI U320 15.000tpm 36Go hdd on RAID1.
I install on it Freebsd 6.0, apache 2.2.0 and mysql 4.1.18 and compare performance with : OLD PowerEDge with only simple Bi-Xeon 3.0 GHZ and freebsd 4.11. The test is simple mysql query done by php script. Result is that test is two time slower with freebsd 6.0 and dual-core than with old server. I try with and without smp and threaded kernel and results are same. I came back to Generic kernel to see if it come from my kernel configuration but result was same. I then though it come from server and try to upgrade an other one and have same result. I then think it come from 6.0 and try with 6.1 beta4 and see same result I then downgrad to 4.11 without smp and then find good perfs. So I just add to 4.11 generic kernel : options SMP # Symmetric MultiProcessor Kernel options APIC_IO # Symmetric (APIC) I/O And then perf go back down from 30secondes to 54 sec. I search a lot on internet and try with this : sysctl machdep.cpu_idle_hlt=0 But result is same. When doing whith smp top it's just as mysql have to wait to have cpu. During 10,20 sec it just go to 2,4% then grow. Without smp it grow very quickly. Does anyone know what's go wrong and what do I have to do to have same perf with smp than without? Thanks, Eric. _______________________________________________ [email protected] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-smp To unsubscribe, send any mail to "[EMAIL PROTECTED]"
