Re: [issue1116] HAMMER:file read speed

[lhmwzy <lhmwzy@xxxxxxxxx>]

You're right.
Sorry for annoyance.
TKS.


2008/8/12 Matthew Dillon <bugs@lists.dragonflybsd.org>:
>
> Matthew Dillon <dillon@apollo.backplane.com> added the comment:
>
> The two configurations aren't even remotely similar.
>
>    You are comparing a FreeBSD SMP system running on 2 cpus against
>    a DragonFly kernel running on 1.
>
>    The VMWare running FreeBSD is emulating an Intel ethernet adapter (EM0).
>    The one running DragonFly is emulating LNC0.  Totally different network
>    adapters.  EM0 is a much better adapter.
>
>    The disk configuration is also completely different.  If those VMWare
>    disks are backed by plain files they could be fragmented on top of that.
>
>    If you want to compare the systems you need to equalize the
>    configurations so you are comparing the same thing.  FreeBSD
>    will still probably pipe the dd test better, but it won't be 2x.
>
>    My guess is that the network adapter differences are creating the
>    biggest issue.  Get EM running on DragonFly too, instead of LNC.  Also
>    either run FreeBSD UP or build a SMP DragonFly kernel.  Check the
>    VMWare setup for those disks as well.
>
>                                                -Matt
>
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