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Getting slow download speed
2014-04-02, 15:11 (This post was last modified: 2014-04-03 03:32 by vielktus.)
Post: #1
Getting slow download speed
Hi there,

I'm getting slow download speed. I used this in my boot file:

For linux:
Code:
#!ipxe
kernel http://192.168.1.1/ipxe/init-os/centos/6.5/vmlinuz_64
initrd http://192.168.1.1/ipxe/init-os/centos/6.5/initrd_64.img
boot

And this is for windows:
Code:
#!ipxe
kernel http://192.168.1.1/ipxe/wimboot
initrd http://192.168.1.1/ipxe/init-os/windows/windows2k8/bootmgr          bootmgr
initrd http://192.168.1.1/ipxe/init-os/windows/windows2k8/bcd         BCD
initrd http://192.168.1.1/ipxe/init-os/windows/windows2k8/boot.sdi    boot.sdi
initrd http://192.168.1.1/ipxe/init-os/windows/windows2k8/boot.wim boot.wim
boot

The kernel initrd.img is 35 MB and it takes about 10 seconds to complete (much slower than old PXE). And the boot.wim too is much slower too.

Im using this version https://git.ipxe.org/ipxe.git/commit/d90...5bd76bc053
Chainloading using undionly.kpxe
iPXE server: VMware vm.
iPXE client: VMware vm.
Vsphere version: 5.0.
VM's NIC: intel e1000

The old PXE im using for above stuffs is faster than iPXE, so sad...
I dont know why. Did i miss any configurations ? Please help Sad
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2014-04-03, 14:29
Post: #2
RE: Getting slow download speed
(2014-04-02 15:11)vielktus Wrote:  Im using this version https://git.ipxe.org/ipxe.git/commit/d90...5bd76bc053
Chainloading using undionly.kpxe
iPXE server: VMware vm.
iPXE client: VMware vm.
Vsphere version: 5.0.
VM's NIC: intel e1000

Try using iPXE's native Intel NIC driver (e.g. use bin/intel.pxe or bin/ipxe.pxe, if you're chainloading).

Michael
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2014-04-03, 15:58 (This post was last modified: 2014-04-03 17:22 by vielktus.)
Post: #3
RE: Getting slow download speed
When i use bin/intel.pxe or bin/ipxe.pxe. The download hangs at a specific x %. Maybe worse than undionly.kpxe ?
The old undionly.kpxe can complete the download and boot but the two you gave me just hang Sad (linux and windows, too)

I build those with "make bin/undionly.kpxe (bin/ipxe.pxe) (bin/intel.pxe)". Keep all default src.
My HTTP server is Apache. Will i need to do something with the Content-Lenght Header ? According to this http://lists.ipxe.org/pipermail/ipxe-dev...02846.html
I tried to use Chrome browser to download the boot.wim and it just take ~ 11 seconds to complete.
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2014-04-04, 09:23
Post: #4
RE: Getting slow download speed
Does anyone get this problem too ?
I use wget to download the boot.wim in just ~13s. But iPXE takes me 34s...
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2014-04-09, 21:03
Post: #5
RE: Getting slow download speed
I get this problem as well when using VM's but I ended up just ignoring it because my real environment doesn't use VM's.


What I found with vm's is that if I totally close the vm window and start it again then it doesn't hang but if I choose reboot from within the VM it hangs nearly every time. I don't think it's freeing memory properly in the VM when you choose reboot.

Hopefully that helps for now.
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2014-04-10, 17:49 (This post was last modified: 2014-04-10 17:51 by vielktus.)
Post: #6
RE: Getting slow download speed
But even if the vm didnt hang at the download, the HTTP speed still be too slow. A winpe 150MB takes ~ 1 minute to complete, unbelievable !!

Can you help me with this? Did ipxe need some configurations ?
I used the ipxe.pxe and the undionly.kpxe. ipxe.pxe faster than undionly.kpxe but the two are much slower thank old TFTP of pxelinux.

One new issue, does ipxe.pxe have driver for broadcom 5709 and Emulex ? My servers are using these NIC model and are unable to get DHCP ( The ipxe is show "is using [NULL]" at the NIC model string).
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