Solaris SPARC speed issue Post: 302698959

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Operating Systems Solaris Solaris SPARC speed issue Post 302698959 by jim mcnamara on Monday 10th of September 2012 10:07:08 PM

09-10-2012

Registered User

Just to inject another point of vie. hergp and jllaigre are correct about threading.

To answer your 32/64bit question: time it yourself on the same dataset with two different compiles. We have done that on a different solaris architecture and found only a small amount of improvement.

If your number cruncher uses big arrays it is possible that you are wasting cpu. If your code constantly forces the cpu to bring in pages of data and to do a lot of searching in the cached pages, you are possibly wasting cpu.

Consider running your code and at the same time run trapstat. Thanks to this we got data to support using larger pagesize effectively. This DOES NOT nesessarily involve coding. A minor change to the way you invoke your code is needed. See the ppgsz man page for a very simple way to do this. Do this if and only if you have an MMU issue issue revealed by trapstat. And I do not know much about your architecture, this may not be as beneficial as it was on our M4000.

Have a read:
Multiple Page Size Support - Siwiki

jim mcnamara

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LEARN ABOUT PLAN9

install-solaris

install-solaris(1M)													       install-solaris(1M)

NAME

       install-solaris - install the Solaris operating system

SYNOPSIS

       install-solaris

       install-solaris	invokes  the  Solaris  Install	program. Depending on graphical capability and available memory at the time of invocation,
       install-solaris invokes either a text-based installer or a graphical installer.

       The following minimum requirements for physical memory dictate which features are available during installation:

       For SPARC machines:

       128 MB

	   Minimum physical memory for all installation types

       128 MB

	   Minimum physical memory required for windowing system

       384 MB

	   Minimum physical memory required for graphical-based installation

       For x86 machines:

       256 MB

	   Minimum physical memory for all installation types

       256 MB

	   Minimum physical memory required for windowing system

       512 MB

	   Minimum physical memory required for graphical-based installation

       In some cases, even if the minimum physical memory is present, available virtual memory after system startup can limit the number  of  fea-
       tures available.

       install-solaris	exists	only  on  the Solaris installation media (CD or DVD) and should be invoked only from there. Refer to the  for more
       details.

       install-solaris allows installation of the operating system onto any standalone system. install-solaris loads the software available on the
       installation media. Refer to the  for disk space requirements.

       Refer to the  for more information on the various menus and selections.

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWcdrom  (Solaris instal-  |
       |			     |lation media)		   |
       +-----------------------------+-----------------------------+
       |Interface Stability	     |Evolving			   |
       +-----------------------------+-----------------------------+

       pkginfo(1), install(1M), pkgadd(1M), attributes(5)

       It is advisable to exit install-solaris by means of the exit options in the install-solaris menus.

								    23 Sep 2005 					       install-solaris(1M)