Re: resctrl2 - status

Hi Tony,

On 9/6/2023 1:21 PM, Tony Luck wrote:

On Mon, Aug 28, 2023 at 07:50:12AM -0700, Reinette Chatre wrote:

quoted

heh ... sounds familiar to "To transition smoothly it may be required
for all currently supported features to be loaded by default". It is not
obvious to me how this also closes the other opens.

Reinette,

It seems unlikley that I'll be able to close every open. But I'll
keep trying as you point them out.

I've just pushed an updated set of patches to:

   git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux.git resctrl_v65

Rebased to v6.5. Includes the module auto-load code discussed in
previous e-mail.

James:

I'm now hoping for some feedback from ARM folks on whether this is a
useful direction. Is it possible to implement MPAM features on top of
this base architecture independent layer. If not, am I just missing
some simple extensions that you will need. Or is there some fundamental
problem that looks hard/impossible to resolve?

Babu:

Can you try this out on an AMD system. I think I covered most of the
existing AMD resctrl features, but I have no machine to test the code
on, so very likely there are bugs in these code paths.

I'd like to make any needed changes now, before I start breaking this
into reviewable bite-sized patches to avoid too much churn.

I tried your latest code briefly on my system.  Unfortunately, I could not get it to work on my AMD system.

# git branch -a
  next
* resctrl2_v65
# ]# uname -r
6.5.0+
#lsmod |grep rdt
rdt_show_ids           12288  0
rdt_mbm_local_bytes    12288  0
rdt_mbm_total_bytes    12288  0
rdt_llc_occupancy      12288  0
rdt_l3_cat             16384  0

# lsmod |grep mbe
amd_mbec               16384  0

I could not get  rdt_l3_mba

# modprobe rdt_l3_mba
modprobe: ERROR: could not insert 'rdt_l3_mba': No such device

I don't see any data for the default group either.

mount  -t resctrl resctrl /sys/fs/resctrl/

cd /sys/fs/resctrl/mon_data/mon_L3_00

cat mbm_summary
     n/a      n/a /

Thanks

Babu


_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel