I noticed ksm spending quite a lot of time in memcmp on a large
KVM box. The current memcmp loop is very unoptimised - byte at a
time compares with no loop unrolling. We can do much much better.
Optimise the loop in a few ways:
- Unroll the byte at a time loop
- For large (at least 32 byte)
From: Colin Ian King colin.k...@canonical.com
hwirq has not been initialized, however it is being incremented
and also not being referenced in a loop. This error was detected with
cppcheck:
[drivers/misc/cxl/irq.c:439]: (error) Uninitialized variable: hwirq
Commit 80fa93fce37d (cxl: Name
Acked-By: Ian Munsie imun...@au1.ibm.com
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Add a testcase for the new ppc64 memcmp.
Signed-off-by: Anton Blanchard an...@samba.org
---
.../testing/selftests/powerpc/stringloops/Makefile | 21 +
.../selftests/powerpc/stringloops/asm/ppc_asm.h| 7 ++
.../selftests/powerpc/stringloops/memcmp_64.S | 1 +
On Wed, Jan 7, 2015 at 2:22 AM, Alan Stern st...@rowland.harvard.edu wrote:
On Tue, 6 Jan 2015, Michael Tessier wrote:
That is interresting, however, I have an older kernel running an
OHCI driver which is able to handle 4 codecs. Same usb hardware
(codecs and hub), but older
On Thu, 2015-01-08 at 22:36 +, Colin King wrote:
From: Colin Ian King colin.k...@canonical.com
hwirq has not been initialized, however it is being incremented
and also not being referenced in a loop. This error was detected with
cppcheck:
[drivers/misc/cxl/irq.c:439]: (error)
This patch removes the redundant sysfs cacheinfo code by reusing
the newly introduced generic cacheinfo infrastructure through the
commit 246246cbde5e (drivers: base: support cpu cache information
interface to userspace via sysfs)
Signed-off-by: Sudeep Holla sudeep.ho...@arm.com
Cc: Benjamin
Hello Scott,
On 01/07/2015 07:12 PM, Scott Wood wrote:
On Wed, 2015-01-07 at 13:44 -0600, Emil Medve wrote:
Hello Scott,
On 01/07/2015 12:05 PM, Scott Wood wrote:
On Tue, 2015-01-06 at 23:29 -0600, Xie Shaohui-B21989 wrote:
+- interrupts
+ Usage: optional
+
Hello,
I developed a SHA224/256 kernel crypto module with SPE instructions.
The result looks quite promising (~ +50% speedup). Nevertheless the
flooding of kernel messages SPE used in kernel makes me feel
uncomfortable.
My findings so far:
- I can configure the kernel with SPE support.
-
On Wed, Jan 07, 2015 at 05:13:49PM -0800, Sukadev Bhattiprolu wrote:
Description of event parameters from the documentation patch:
Event parameters are a basic way for partial events to be specified in
sysfs with per-event names given to the fields that need to be filled in
when
On Wed, 2015-01-07 at 11:04 -0600, Scott Wood wrote:
On Wed, 2015-01-07 at 15:44 +0100, Benjamin Herrenschmidt wrote:
On Mon, 2015-01-05 at 12:10 -0600, Scott Wood wrote:
It would have been nice if a code comment explained why it was doing the
readback... I don't see any particular need
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