On Tue, 20 Apr 2021, Suthikulpanit, Suravee wrote:
> David / Joerg,
>
> On 4/10/2021 5:03 PM, David Coe wrote:
> >
> > The immediately obvious difference is the with the enormous count seen on
> > mem_dte_mis on the older Ryzen 2400G. Will do some RTFM but anyone
> > with comments and insight?
David / Joerg,
On 4/10/2021 5:03 PM, David Coe wrote:
The immediately obvious difference is the with the enormous count seen on
mem_dte_mis on the older Ryzen 2400G. Will do some RTFM but anyone with
comments and insight?
841,689,151,202,939 amd_iommu_0/mem_dte_mis/
Hi Suravee!
Results for Ryzen 2400G on Ubuntu 20.10, kernel 5.8.0-50 with patch 2/2
alone. Events batched 3 x 8 to avoid counter-multiplexing (?) artefacts.
On 15/04/2021 10:28, Suthikulpanit, Suravee wrote:
David,
For the Ryzen 2400G, could you please try with:
- 1 event at a time
- Not
Hi Suravee!
On 15/04/2021 10:28, Suthikulpanit, Suravee wrote:
David,
On 4/14/2021 10:33 PM, David Coe wrote:
Hi Suravee!
I've re-run your revert+update patch on Ubuntu's latest kernel
5.11.0-14 partly to check my mailer's 'mangling' hadn't also reached
the code!
There are 3 sets of
I think you've put your finger on it, Suravee!
On 15/04/2021 10:28, Suthikulpanit, Suravee wrote:
David,
On 4/14/2021 10:33 PM, David Coe wrote:
Hi Suravee!
I've re-run your revert+update patch on Ubuntu's latest kernel
5.11.0-14 partly to check my mailer's 'mangling' hadn't also reached
David,
On 4/14/2021 10:33 PM, David Coe wrote:
Hi Suravee!
I've re-run your revert+update patch on Ubuntu's latest kernel 5.11.0-14 partly
to check my mailer's 'mangling' hadn't also reached the code!
There are 3 sets of results in the attachment, all for the Ryzen 2400G. The
as-distributed
Hi again!
For completeness, I'm attaching results for the revert+update patch
running the Ubuntu 21.04β kernel 5.11.0-14 on a Ryzen 4700U laptop.
The enormous amd_iommu running stats aren't always there, as they nearly
always are on the the 2400G desktop, but they do turn up (depending on
Hi Suravee!
I've re-run your revert+update patch on Ubuntu's latest kernel 5.11.0-14
partly to check my mailer's 'mangling' hadn't also reached the code!
There are 3 sets of results in the attachment, all for the Ryzen 2400G.
The as-distributed kernel already incorporates your IOMMU RFCv3
On 4/10/2021 5:03 PM, David Coe wrote:
Results for AMD Ryzen 4700U running Ubuntu 21.04β kernel 5.11.0-13
$ sudo dmesg | grep IOMMU
[ 0.490352] pci :00:00.2: AMD-Vi: IOMMU performance counters supported
[ 0.491985] pci :00:00.2: AMD-Vi: Found IOMMU cap 0x40
[ 0.493732]
Hi Suravee!
Just in case (!), I've run your revert+update patch on kernel 5.11.0-13,
Ubuntu 21.04β running on an AMD FX-8350 (pre Zen and IOMMUv2). As with
the AMD Ryzen 2400G and 4700U, I'm finding no obvious issues.
$ sudo dmesg | grep IOMMU
[0.948890] pci :00:00.2: AMD-Vi: Found
Results for AMD Ryzen 4700U running Ubuntu 21.04β kernel 5.11.0-13
$ sudo dmesg | grep IOMMU
[0.490352] pci :00:00.2: AMD-Vi: IOMMU performance counters
supported
[0.491985] pci :00:00.2: AMD-Vi: Found IOMMU cap 0x40
[0.493732] perf/amd_iommu: Detected AMD IOMMU #0 (2
Well, well! This is a promising start to the weekend. Thank you both,
Suravee and Paul.
Results for AMD Ryzen 4 2400G
running Ubuntu 21.04β kernel 5.11.0-13 and Windows 10 2H2 under KVM
$ sudo dmesg | grep IOMMU
[0.557725] pci :00:00.2: AMD-Vi: IOMMU performance counters
supported
On 4/9/21 2:00 PM, Shuah Khan wrote:
On 4/9/21 2:58 AM, Suravee Suthikulpanit wrote:
In early AMD desktop/mobile platforms (during 2013), when the IOMMU
Performance Counter (PMC) support was first introduced in
commit 30861ddc9cca ("perf/x86/amd: Add IOMMU Performance Counter
resource
On 09/04/2021 09:58, Suravee Suthikulpanit wrote:
In early AMD desktop/mobile platforms (during 2013), when the IOMMU
Performance Counter (PMC) support was first introduced in
commit 30861ddc9cca ("perf/x86/amd: Add IOMMU Performance Counter
resource management"), there was a HW bug where the
On 4/9/21 2:58 AM, Suravee Suthikulpanit wrote:
In early AMD desktop/mobile platforms (during 2013), when the IOMMU
Performance Counter (PMC) support was first introduced in
commit 30861ddc9cca ("perf/x86/amd: Add IOMMU Performance Counter
resource management"), there was a HW bug where the
On 4/9/21 10:37 AM, Shuah Khan wrote:
On 4/9/21 2:58 AM, Suravee Suthikulpanit wrote:
In early AMD desktop/mobile platforms (during 2013), when the IOMMU
Performance Counter (PMC) support was first introduced in
commit 30861ddc9cca ("perf/x86/amd: Add IOMMU Performance Counter
resource
On 4/9/21 2:58 AM, Suravee Suthikulpanit wrote:
In early AMD desktop/mobile platforms (during 2013), when the IOMMU
Performance Counter (PMC) support was first introduced in
commit 30861ddc9cca ("perf/x86/amd: Add IOMMU Performance Counter
resource management"), there was a HW bug where the
In early AMD desktop/mobile platforms (during 2013), when the IOMMU
Performance Counter (PMC) support was first introduced in
commit 30861ddc9cca ("perf/x86/amd: Add IOMMU Performance Counter
resource management"), there was a HW bug where the counters could not
be accessed. The result was reading
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