Question About Timers for Performance Analysis on BCM1480/1250 Systems

Question About Timers for Performance Analysis on BCM1480/1250 Systems

[Gary Smith]

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All,

 

The following message thread is present in the Linux-Mips archives regarding
the use of gettimeofday on Broadcom MIPS systems.
http://www.linux-mips.org/archives/linux-mips/2006-01/msg00144.html  The
message thread specifically addresses the Dual-core Broadcom 1250 system,
and the kernel version mentioned in the message thread is 2.6.12.  I looked
at the files mentioned in the message thread in the 2.6.17 kernel, and the
changes suggested for arch/mips/dec/time.c were present in 2.6.17.  However,
the subsequent patches suggested in the message thread were not present in
the version of the 2.6.17 kernel I checked.  We'd like to ask if the patches
suggested in the message thread have been observed to influence performance
numbers obtained by other Linux system developers for Quad-core Broadcom
1480 systems?  If so, do the Linux-Mips developers suggest that we apply the
patches suggested in the message thread for our Broadcom 1480 MIPS specific
Linux 2.6.17 system implementation?

 

Thanks,

Gary

--

Gary A. Smith, ABD PhD
Engineer, 3Phoenix, Inc.

3331 Heritage Trade Drive

Suite 101

Wake Forest, NC  27587

919.562.5333 x107

 <http://www.3Phoenix.com> http://www.3Phoenix.com

Gary.Smith@3Phoenix.com

 


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Question About Timers for Performance Analysis on BCM1480/1250 Systems

[Gary Smith]

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All,

 

The following message thread is present in the Linux-Mips archives regarding
the use of gettimeofday on Broadcom MIPS systems.
http://www.linux-mips.org/archives/linux-mips/2006-01/msg00144.html  The
message thread specifically addresses the Dual-core Broadcom 1250 system,
and the kernel version mentioned in the message thread is 2.6.12.  I looked
at the files mentioned in the message thread in the 2.6.17 kernel, and the
changes suggested for arch/mips/dec/time.c were present in 2.6.17.  However,
the subsequent patches suggested in the message thread were not present in
the version of the 2.6.17 kernel I checked.  We'd like to ask if the patches
suggested in the message thread have been observed to influence performance
numbers obtained by other Linux system developers for Quad-core Broadcom
1480 systems?  If so, do the Linux-Mips developers suggest that we apply the
patches suggested in the message thread for our Broadcom 1480 MIPS specific
Linux 2.6.17 system implementation?

 

Thanks,

Gary

--

Gary A. Smith, ABD PhD
Engineer, 3Phoenix, Inc.

3331 Heritage Trade Drive

Suite 101

Wake Forest, NC  27587

919.562.5333 x107

 <http://www.3Phoenix.com> http://www.3Phoenix.com

Gary.Smith@3Phoenix.com

 


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Re: Question About Timers for Performance Analysis on BCM1480/1250 Systems

[Ralf Baechle]

On Tue, Jun 19, 2007 at 12:07:21PM -0400, Gary Smith wrote:

> The following message thread is present in the Linux-Mips archives regarding
> the use of gettimeofday on Broadcom MIPS systems.
> http://www.linux-mips.org/archives/linux-mips/2006-01/msg00144.html  The
> message thread specifically addresses the Dual-core Broadcom 1250 system,
> and the kernel version mentioned in the message thread is 2.6.12.  I looked
> at the files mentioned in the message thread in the 2.6.17 kernel, and the
> changes suggested for arch/mips/dec/time.c were present in 2.6.17.  However,
> the subsequent patches suggested in the message thread were not present in
> the version of the 2.6.17 kernel I checked.  We'd like to ask if the patches
> suggested in the message thread have been observed to influence performance
> numbers obtained by other Linux system developers for Quad-core Broadcom
> 1480 systems?  If so, do the Linux-Mips developers suggest that we apply the
> patches suggested in the message thread for our Broadcom 1480 MIPS specific
> Linux 2.6.17 system implementation?

The patch never went in.

I'm currently turning the entire time code upside down which will also solve
this issue.

  Ralf