On Mon, Jan 22, 2024 at 08:20:28AM -0800, mhkelle...@gmail.com wrote:
> From: Michael Kelley
>
> Current code in netvsc_drv_init() incorrectly assumes that PAGE_SIZE
> is 4 Kbytes, which is wrong on ARM64 with 16K or 64K page size. As a
> result, the default VMBus ring buffer size on ARM64 with 6
From: Michael Kelley
Current code uses the specified ring buffer size (either the default of
128 Kbytes or a module parameter specified value) to encompass the one page
ring buffer header plus the actual ring itself. When the page size is
4K, carving off one page for the header isn't significant
From: Michael Kelley
Current code in netvsc_drv_init() incorrectly assumes that PAGE_SIZE
is 4 Kbytes, which is wrong on ARM64 with 16K or 64K page size. As a
result, the default VMBus ring buffer size on ARM64 with 64K page size
is 8 Mbytes instead of the expected 512 Kbytes. While this doesn't
Existing MANA design assigns IRQ to every CPU, including sibling
hyper-threads. This may cause multiple IRQs to be active simultaneously
in the same core and may reduce the network performance.
Improve the performance by assigning IRQ to non sibling CPUs in local
NUMA node. The performance improve
From: Yury Norov
Souradeep investigated that the driver performs faster if IRQs are
spread on CPUs with the following heuristics:
1. No more than one IRQ per CPU, if possible;
2. NUMA locality is the second priority;
3. Sibling dislocality is the last priority.
Let's consider this topology:
No
From: Yury Norov
Now we can simplify code that allocates cpumasks for local needs.
Signed-off-by: Yury Norov
---
include/linux/cpumask.h | 3 +++
1 file changed, 3 insertions(+)
diff --git a/include/linux/cpumask.h b/include/linux/cpumask.h
index 228c23eb36d2..1c29947db848 100644
--- a/includ
From: Yury Norov
Similarly to cpumask_weight_and(), cpumask_weight_andnot() is a handy
helper that may help to avoid creating an intermediate mask just to
calculate number of bits that set in a 1st given mask, and clear in 2nd
one.
Signed-off-by: Yury Norov
Reviewed-by: Jacob Keller
---
inclu
This patch set introduces a new helper function irq_setup(),
to optimize IRQ distribution for MANA network devices.
The patch set makes the driver working 15% faster than
with cpumask_local_spread().
Souradeep Chakrabarti (1):
net: mana: Assigning IRQ affinity on HT cores
Yury Norov (3):
cpum
From: Michael Kelley
A Hyper-V host provides its guest VMs with entropy in a custom ACPI
table named "OEM0". The entropy bits are updated each time Hyper-V
boots the VM, and are suitable for seeding the Linux guest random
number generator (rng). See a brief description of OEM0 in [1].
Generati
