[syslinux] Syslinux 4.04 gpxelinux.0 http performance problem with VMware VMs

[Pasi Kärkkäinen]

On Tue, May 08, 2012 at 10:21:50PM +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 Syslinux 4.04 is obsolete and probably not worth debugging.  4.05 is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.
> > 
> 
> Hello again,
> 
> When using syslinux 4.10-pre20 pxelinux.0 I'm able to get 3-6 MB/sec 
> over http with VMXNET3 NIC in the VM.
> 
> Did you have to do any special settings (or patches) to get to 45-70 MB/s ?
> 

Hello,

Still wondering about this.. :)

-- Pasi