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Re: [Xen-devel] Question about the ability of credit scheduler to handle
| To: | Yuehai Xu <yuehaixu@xxxxxxxxx> |
|---|---|
| Subject: | Re: [Xen-devel] Question about the ability of credit scheduler to handle I/O and CPU intensive VMs |
| From: | George Dunlap <George.Dunlap@xxxxxxxxxxxxx> |
| Date: | Fri, 8 Oct 2010 11:11:42 +0100 |
| Cc: | xen-devel@xxxxxxxxxxxxxxxxxxx, yhxu@xxxxxxxxx |
| Delivery-date: | Fri, 08 Oct 2010 03:12:31 -0700 |
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OK, scratch that... the #defines were renamed, but the actual values
remained the same; so the binaries are compatible.
The results show up in the xenalyze output as "mmio_assist" (for MMIO)
and "io [read|write]" (for PIO).
-George
On Fri, Oct 8, 2010 at 11:03 AM, George Dunlap
<George.Dunlap@xxxxxxxxxxxxx> wrote:
> On Fri, Oct 8, 2010 at 10:57 AM, George Dunlap
> <George.Dunlap@xxxxxxxxxxxxx> wrote:
>> Regarding tracing IO_READs: The code that did IO was refactored some
>> time back; I remember trying to figure out how to cleanly do the
>> tracing, but finding it difficult. I can't remember now, though, what
>> the issue was. Let me take a look again.
>
> Ah, that's right -- IO_READ was replaced with
> IO{PORT,MEM}_{READ_WRITE}. It's traced in
> xen/arch/x86/hvm/emulate.c:hvmtrace_io_assist(). xenalyze simply
> hasn't been updated to understand those traces yet.
>
> -George
>
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