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Nilay Vaish 343e94a257 Ruby: Improve Change PerfectSwitch's wakeup function 
Currently the wakeup function for the PerfectSwitch contains three loops -

loop on number of virtual networks
  loop on number of incoming links
	    loop till all messages for this (link, network) have been routed

With an 8 processor mesh network and Hammer protocol, about 11-12% of the
was observed to have been spent in this function, which is the highest
amongst all the functions. It was found that the innermost loop is executed
about 45 times per invocation of the wakeup function, when each invocation
of the wakeup function processes just about one message.

The patch tries to do away with the redundant executions of the innermost
loop. Counters have been added for each virtual network that record the
number of messages that need to be routed for that virtual network. The
inner loops are only executed when the number of messages for that particular
virtual network > 0. This does away with almost 80% of the executions of the
innermost loop. The function now consumes about 5-6% of the total execution
time.
2011-02-14 16:14:54 -06:00
build_opts X86: Build O3 by default in SE. 2011-02-02 18:17:16 -08:00
configs VNC: Add VNC server to M5 2011-02-11 18:29:35 -06:00
ext Ext: Add X11 keysym header files to ext directory. 2011-02-09 22:27:37 -06:00
src Ruby: Improve Change PerfectSwitch's wakeup function 2011-02-14 16:14:54 -06:00
system/arm/simple_bootloader ARM: Add code for a simple bootloader for MP boot. 2011-01-18 16:29:59 -06:00
tests X86: Update stats for the improved branch detection/prediction. 2011-02-13 17:46:04 -08:00
util m5: added work completed monitoring support 2011-02-06 22:14:19 -08:00
.hgignore .hgignore: added src/doxygen 2010-07-27 20:00:38 -07:00
.hgtags Added tag Calvin_Submission for changeset 5de565c4b7bd 2009-11-18 11:55:42 -06:00
AUTHORS RELEASE: More changes to text 2007-11-01 21:07:49 -04:00
LICENSE Update copyright dates 2008-02-11 12:35:28 -05:00
README Update the README and RELEASE_NOTES files to prepare for beta 6. 2008-10-07 00:53:25 -04:00
RELEASE_NOTES Update the README and RELEASE_NOTES files to prepare for beta 6. 2008-10-07 00:53:25 -04:00
SConstruct SConstruct: Fix the librt check in SConstruct. 2011-01-21 17:51:22 -08:00

README 

This is release 2.0_beta6 of the M5 simulator.

For detailed information about building the simulator and getting
started please refer to http://www.m5sim.org.

Specific pages of interest are:
http://www.m5sim.org/wiki/index.php/Compiling_M5
http://www.m5sim.org/wiki/index.php/Running_M5

Short version:

1. If you don't have SCons version 0.96.91 or newer, get it from
http://wwww.scons.org.

2. If you don't have SWIG version 1.3.28 or newer, get it from
http://wwww.swig.org.

3. In this directory, type 'scons build/ALPHA_SE/tests/debug/quick'.  This
will build the debug version of the m5 binary (m5.debug) for the Alpha
syscall emulation target, and run the quick regression tests on it.

If you have questions, please send mail to m5-users@m5sim.org

WHAT'S INCLUDED (AND NOT)
-------------------------

The basic source release includes these subdirectories:
 - m5: 
   - src: source code of the m5 simulator
   - tests: regression tests
   - ext: less-common external packages needed to build m5

To run full-system simulations, you will need compiled console,
PALcode, and kernel binaries and one or more disk images.  These files
are collected in a separate archive, m5_system.tar.bz2.  This file
can he downloaded separately.

M5 supports Linux 2.4/2.6, FreeBSD, and the proprietary Compaq/HP
Tru64 version of Unix. We are able to distribute Linux and FreeBSD
bootdisks, but we are unable to distribute bootable disk images of
Tru64 Unix. If you have a Tru64 license and are interested in
obtaining disk images, contact us at m5-users@m5sim.org