Hi List, What's the fastest anyone has every completed buildworld on a single machine?
The reason I ask is because we just got some new hardware in and decided to benchmark it using buildworld. Just as a quick test, we decided to perform "make -j 48 buildworld". We finished in approximately 9 minutes. I think that we can improve upon that, but am having a bit of difficulty. Can anyone offer any pointers in how to achieve the fastest buildworld possible? No particular reason... we're just trying to push the boundaries of what's possible. For reference the machine we're compiling on is a dual-socket Nehalem Xeon (six-core per proc; HTT enabled; 24 total CPUs presented by APIC) with 48GB of RAM, an LSI MegaSAS RAID controller, and an LSI 2Gbps Fibre Channel HBA going to an 8TB NEC D-4 array. ASIDE: Doing the same buildworld on a 4-disk ZFS raidz yielded approximately 11-minutes. Performing the buildworld on the NEC D-4 over the 2Gbps FC HBA yielded approximately 12 minutes. And for some unknown reason, performing buildworld on tmpfs yielded 13 minutes. We thought going tmpfs would make things faster, but that resulted in over 13 minutes (huh? you'd think a RAM disk would be smoking compared to even the SSDs that we used to achieve ~9 min; do note that we did make sure to nullfs mount a tmpfs-based directory onto /usr/obj -- though the performance of that nullfs mount might have hurt the test, not sure). -- Devin _____________ The information contained in this message is proprietary and/or confidential. If you are not the intended recipient, please: (i) delete the message and all copies; (ii) do not disclose, distribute or use the message in any manner; and (iii) notify the sender immediately. In addition, please be aware that any message addressed to our domain is subject to archiving and review by persons other than the intended recipient. Thank you. _____________ _______________________________________________ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "freebsd-questions-unsubscr...@freebsd.org"
