On 11/23/2015 05:01 PM, Brendan Gregg wrote:
On Mon, Nov 23, 2015 at 6:35 AM, Boris Ostrovsky
mailto:boris.ostrov...@oracle.com>> wrote:
On 11/20/2015 07:21 PM, Brendan Gregg wrote:
These new features would need a corresponding change in Linux for
PV guests (or for dom0 to chan
On Mon, Nov 23, 2015 at 6:35 AM, Boris Ostrovsky wrote:
> (+ Dietmar)
>
> On 11/20/2015 07:21 PM, Brendan Gregg wrote:
>
>> G'Day,
>>
>> The vpmu feature of Xen is incredibly useful for performance analysis,
>> however, it's currently all counters or nothing. In secure environments,
>> there can
(+ Dietmar)
On 11/20/2015 07:21 PM, Brendan Gregg wrote:
G'Day,
The vpmu feature of Xen is incredibly useful for performance analysis,
however, it's currently all counters or nothing. In secure
environments, there can be hesitation to enable access to all PMCs
(there are hundreds of them). I
On 23/11/15 11:08, Jan Beulich wrote:
On 21.11.15 at 06:32, wrote:
>> I've included the short patch below for Xen 4.6.0, which provides these
>> modes (it also fixes a minor copy-and-paste error with
>> core2_get_fixed_pmc_count(), which I believe was accessing the wrong
>> register). I am no
>>> On 21.11.15 at 06:32, wrote:
> I've included the short patch below for Xen 4.6.0, which provides these
> modes (it also fixes a minor copy-and-paste error with
> core2_get_fixed_pmc_count(), which I believe was accessing the wrong
> register). I am not a veteran Xen programmer, so please feel
G'Day,
The vpmu feature of Xen is incredibly useful for performance analysis,
however, it's currently all counters or nothing. In secure environments,
there can be hesitation to enable access to all PMCs (there are hundreds of
them). I've included a prototype patch that introduces two new restrict
