This bug is awaiting verification that the linux-mtk/5.15.0-1030.34
kernel in -proposed solves the problem. Please test the kernel and
update this bug with the results. If the problem is solved, change the
tag 'verification-needed-jammy-linux-mtk' to 'verification-done-jammy-
linux-mtk'. If the
This bug is awaiting verification that the linux-xilinx-
zynqmp/5.15.0-1024.28 kernel in -proposed solves the problem. Please
test the kernel and update this bug with the results. If the problem is
solved, change the tag 'verification-needed-jammy-linux-xilinx-zynqmp'
to
This bug is awaiting verification that the linux-
aws-5.15/5.15.0-1046.51~20.04.1 kernel in -proposed solves the problem.
Please test the kernel and update this bug with the results. If the
problem is solved, change the tag 'verification-needed-focal-linux-
aws-5.15' to
Kernel 6.2.0-27.28 in lunar-proposed is verified to fix the bug.
** Tags removed: verification-needed-lunar
** Tags added: verification-done-lunar
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This bug is awaiting verification that the linux/6.2.0-27.28 kernel in
-proposed solves the problem. Please test the kernel and update this bug
with the results. If the problem is solved, change the tag
'verification-needed-lunar' to 'verification-done-lunar'. If the problem
still exists, change
Kernel 5.15.0-79.86 from jammy-proposed is verified to fix this bug.
** Tags removed: verification-needed-jammy
** Tags added: verification-done-jammy
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This bug is awaiting verification that the linux/5.15.0-79.86 kernel in
-proposed solves the problem. Please test the kernel and update this bug
with the results. If the problem is solved, change the tag
'verification-needed-jammy' to 'verification-done-jammy'. If the problem
still exists, change
** Changed in: linux (Ubuntu Kinetic)
Status: In Progress => Won't Fix
** Changed in: linux (Ubuntu Jammy)
Status: In Progress => Fix Committed
** Changed in: linux (Ubuntu Lunar)
Status: In Progress => Fix Committed
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** Description changed:
[Impact]
Currently Ubuntu kernel has this kernel config disabled.
But in some cases, Intel's Sapphire Rapids High Bandwith
Memory (SPR-HBM) needs this option.
Memory bandwidth has been a bottleneck of increasingly memory bound
workloads. Sapphire Rapids
Hi Keng-Yu,
Here is a test kernel for lunar. I had only included the source before
and not the debs. Can you please test and verify the config_numa_emu
option works and provides the performance boost.
https://people.canonical.com/~mreed/hpe/lp_2008745_config_numa_emu/lunar/
** Description
@mreed8855:
We used "STREAM-triadd" algorithm* in Intel MLC** to benchmark 3 scenarios
(no fake NUMA, 2U fake NUMA and 4U fake NUMA).
*
https://www.intel.com/content/www/us/en/developer/articles/technical/optimizing-memory-bandwidth-on-stream-triad.html
**
Hi Keng-Yu,
In comment #4, you mentioned there was an improvement in the performance
on the Sapphire Rapids CPU with HBM, how exactly did you quantify that?
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As described in
https://community.intel.com/t5/Blogs/Products-and-Solutions/HPC/Enabling-High-Bandwidth-Memory-for-HPC-and-AI-Applications-for/post/1335100,
for Intel Sapphire Rapids CPUs with HBM, it is possible to utilize the HBM as
cache (so called "2LM mode"). It works in the way to create N
** Description changed:
[Impact]
Currently Ubuntu kernel has this kernel config disabled.
But in some cases, Intel's Sapphire Rapids High Bandwith
Memory (SPR-HBM) needs this option.
Memory bandwidth has been a bottleneck of increasingly memory bound
workloads. Sapphire Rapids
** Changed in: linux (Ubuntu Kinetic)
Importance: Undecided => Medium
** Changed in: linux (Ubuntu Jammy)
Importance: Undecided => Medium
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I have created a test kernel for Kinetic
https://people.canonical.com/~mreed/hpe/lp_2008745_config_numa_emu/kinetic/
** Description changed:
[Impact]
Currently Ubuntu kernel has this kernel config disabled.
But in some case, Intel's SPR-HBM needs this.
Please search the keyword "fake
** Also affects: linux (Ubuntu Kinetic)
Importance: Undecided
Status: New
** Also affects: linux (Ubuntu Lunar)
Importance: Medium
Assignee: Michael Reed (mreed8855)
Status: Incomplete
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You received this bug notification because you are a member of Kernel
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I have created a test kernel. Please test.
https://people.canonical.com/~mreed/hpe/lp_2008745_config_numa_emu/
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https://bugs.launchpad.net/bugs/2008745
Title:
[SRU] Intel
** Description changed:
[Impact]
Currently Ubuntu kernel has this kernel config disabled.
But in some case, Intel's SPR-HBM needs this.
Please search the keyword "fake numa" in
https://community.intel.com/t5/Blogs/Products-and-
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