[syslinux] Syslinux 4.04 gpxelinux.0 http performance problem with VMware VMs
Pasi Kärkkäinen
pasik at iki.fi
Tue May 8 05:24:48 PDT 2012
On Tue, May 08, 2012 at 02:05:31PM +0300, Pasi Kärkkäinen wrote:
> On Mon, May 07, 2012 at 09:53:35PM -0400, Gene Cumm wrote:
> > On Mon, May 7, 2012 at 4:40 PM, Pasi Kärkkäinen <pasik at iki.fi> wrote:
> > > Hello,
> > >
> > > In my testing environment I have two VMs on ESXi 5.0.
> > >
> > > VM A = dhcp/tftp/PXE/http server, running CentOS 6.2. Syslinux 4.04 with the included gpxelinux.0.
> > > VM B = PXE boot client.
> >
> > > Any ideas what's causing the bad performance and those continuous retransmits?
> > > Anything I should try to debug this?
> > >
> > > On baremetal with Intel NICs I've seen much better gpxelinux.0 download speeds over http.
> >
> > Syslinux 4.04 is obsolete and probably not worth debugging. 4.05 is
> > current and 4.10-pre20 is a beta with lwIP, a lightweight IP stack,
> > eliminating the need for gPXE if you only want HTTP downloads. I've
> > already been testing 4.10-pre* in VMware VMs with success after my
> > patch. I've seen a solid 45-70 MB/s after that patch on VMware VMs.
> >
>
> That sounds really nice! I'll have to try the new stuff.
>
Oh, is there any documentation or examples about the new non-gPXE stuff?
Should I just use pxelinux.0 to get the LwIP http?
I couldn't find anything with "grep -i lwip doc/*" in the git clone,
but maybe I'll start browsing the changelogs :)
Thanks,
-- Pasi
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