Re: [Xen-devel] Slow HVM boot time, was "HVM boot time optimization"

2018-02-16 Thread Alexey G
On Fri, 16 Feb 2018 09:05:02 +0100 Yessine Daoud wrote: >Hello, > >Please find attached the requested log file. According to the log, string I/O is actually passed from IOREQ buffered -- in groups of 4096 I/O read ops, but they're still emulated one by one, calling QEMU's

Re: [Xen-devel] Slow HVM boot time, was "HVM boot time optimization"

2018-02-15 Thread Alexey G
On Thu, 15 Feb 2018 17:02:35 +0100 Yessine Daoud wrote: > Hello, > >I tried to debug the issue and this what I found: >the HVM boot takes some time at the following section >(qemu/pc-bios/optionrom/linuxboot.S) >/* Load kernel and initrd */

Re: [Xen-devel] Slow HVM boot time, was "HVM boot time optimization"

2018-02-15 Thread Yessine Daoud
Hello, I tried to debug the issue and this what I found: the HVM boot takes some time at the following section (qemu/pc-bios/optionrom/linuxboot.S) /* Load kernel and initrd */ read_fw_blob_addr32_edi(FW_CFG_INITRD) (ramdisk about 3M takes ~~7.s) read_fw_blob_addr32(FW_CFG_KERNEL) (vmlinuz about

Re: [Xen-devel] Slow HVM boot time, was "HVM boot time optimization"

2018-02-12 Thread Wei Liu
On Mon, Feb 12, 2018 at 09:27:25AM +0100, Yessine Daoud wrote: > Hello, > > Thank you for your quick response. > Any hints how can I "fix" this "issue"? *Any workaround? > Honestly I have no idea why it is slow unless there is more logging available. Wei.

Re: [Xen-devel] Slow HVM boot time, was "HVM boot time optimization"

2018-02-08 Thread Wei Liu
On Thu, Feb 08, 2018 at 04:56:00PM +, Anthony PERARD wrote: > On Thu, Feb 08, 2018 at 04:48:10PM +, Wei Liu wrote: > > On Thu, Feb 08, 2018 at 08:31:40AM -0800, Stefano Stabellini wrote: > > > CC'ing xen-devel and a few relevant people > > > > > > On Thu, 8 Feb 2018, Yessine Daoud wrote:

Re: [Xen-devel] Slow HVM boot time, was "HVM boot time optimization"

2018-02-08 Thread Anthony PERARD
On Thu, Feb 08, 2018 at 04:48:10PM +, Wei Liu wrote: > On Thu, Feb 08, 2018 at 08:31:40AM -0800, Stefano Stabellini wrote: > > CC'ing xen-devel and a few relevant people > > > > On Thu, 8 Feb 2018, Yessine Daoud wrote: > > > Dear Sir, > > > I need your help please. > > > > > > I am using a

Re: [Xen-devel] Slow HVM boot time, was "HVM boot time optimization"

2018-02-08 Thread Wei Liu
On Thu, Feb 08, 2018 at 08:31:40AM -0800, Stefano Stabellini wrote: > CC'ing xen-devel and a few relevant people > > On Thu, 8 Feb 2018, Yessine Daoud wrote: > > Dear Sir, > > I need your help please. > > > > I am using a direct kernel boot (HVM guest) with kernel + ramdisk. > > At boot, seabios

Re: [Xen-devel] Slow HVM boot time, was "HVM boot time optimization"

2018-02-08 Thread George Dunlap
On Thu, Feb 8, 2018 at 4:31 PM, Stefano Stabellini wrote: > CC'ing xen-devel and a few relevant people > > On Thu, 8 Feb 2018, Yessine Daoud wrote: >> Dear Sir, >> I need your help please. >> >> I am using a direct kernel boot (HVM guest) with kernel + ramdisk. >> At boot,