http://bugzilla.kernel.org/show_bug.cgi?id=15064
Summary: i7 turbo boost not working properly
Product: ACPI
Version: 2.5
Platform: All
OS/Version: Linux
Tree: Mainline
Status: NEW
Severity: normal
Priority: P1
Component: Config-Processors
AssignedTo: acpi_config-process...@kernel-bugs.osdl.org
ReportedBy: aagaa...@gmail.com
Regression: No
Created an attachment (id=24575)
--> (http://bugzilla.kernel.org/attachment.cgi?id=24575)
sysbench cpu tests with 1 thread, 4 threads and 8 threads
I have a alienware m15x, with "Turbo mode" enabled in the bios. In windows it
appears to be working properly, but in linux (which is my main enviroment) it
doesn't look like it's working.
I've seen this with multiple programs, I'm attaching sysbench output.
Running 1 thread I get:
avg: 61.71ms
Running 4 threads I get:
avg: 60.64ms
Running 8 threads I get:
avg: 112.34ms
This is a i7 quad core, so I expected the drop between 4 and 8 threads. But
running a single thread should be a higher average as the turbo boost should
kick in.
See this bug on the ubuntu launchpad:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/429036
I believe the original report relates to an issue that might already be solved,
but comment #3 is seeing the same thing I am. He also has some info in comment
#9 where he says it's only his mobile i7's that are affected.
I've also tried using the "i7z" tool found here:
http://code.google.com/p/i7z/
To monitor my performance, now I thought the math was off because of
hyperthreading so the original bugreport is a bit misleading, but there's some
more information here:
http://code.google.com/p/i7z/issues/detail?id=1
--
Configure bugmail: http://bugzilla.kernel.org/userprefs.cgi?tab=email
------- You are receiving this mail because: -------
You are watching the assignee of the bug.
------------------------------------------------------------------------------
Throughout its 18-year history, RSA Conference consistently attracts the
world's best and brightest in the field, creating opportunities for Conference
attendees to learn about information security's most important issues through
interactions with peers, luminaries and emerging and established companies.
http://p.sf.net/sfu/rsaconf-dev2dev
_______________________________________________
acpi-bugzilla mailing list
acpi-bugzilla@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/acpi-bugzilla
