This way things that don't care about work count options and/or aren't called
by something that has those command line options set up doesn't have to build
a fake object to carry in inert values.
This makes sure that the address ranges requested for caches and uncached ports
don't conflict with each other, and that accesses which are always uncached
(message signaled interrupts for instance) don't waste time passing through
caches.
M5 skips over any simulated time where it doesn't have any work to do. When
the simulation is active, the time skipped is short and the work done at any
point in time is relatively substantial. If the time between events is long
and/or the work to do at each event is small, it's possible for simulated time
to pass faster than real time. When running a benchmark that can be good
because it means the simulation will finish sooner in real time. When
interacting with the real world through, for instance, a serial terminal or
bridge to a real network, this can be a problem. Human or network response time
could be greatly exagerated from the perspective of the simulation and make
simulated events happen "too soon" from an external perspective.
This change adds the capability to force the simulation to run no faster than
real time. It does so by scheduling a periodic event that checks to see if
its simulated period is shorter than its real period. If it is, it stalls the
simulation until they're equal. This is called time syncing.
A future change could add pseudo instructions which turn time syncing on and
off from within the simulation. That would allow time syncing to be used for
the interactive parts of a session but then turned off when running a
benchmark using the m5 utility program inside a script. Time syncing would
probably not happen anyway while running a benchmark because there would be
plenty of work for M5 to do, but the event overhead could be avoided.
Most of these frontend configurations share cache configuration code, pull it out so that
changes to caches don't have to require changing multiple config files.
Get rid of misc.py and just stick misc things in __init__.py
Move utility functions out of SCons files and into m5.util
Move utility type stuff from m5/__init__.py to m5/util/__init__.py
Remove buildEnv from m5 and allow access only from m5.defines
Rename AddToPath to addToPath while we're moving it to m5.util
Rename read_command to readCommand while we're moving it
Rename compare_versions to compareVersions while we're moving it.
--HG--
rename : src/python/m5/convert.py => src/python/m5/util/convert.py
rename : src/python/m5/smartdict.py => src/python/m5/util/smartdict.py
Previously there was one per bus, which caused some coherence problems
when more than one decided to respond. Now there is just one on
the main memory bus. The default bus responder on all other buses
is now the downstream cache's cpu_side port. Caches no longer need
to do address range filtering; instead, we just have a simple flag
to prevent snoops from propagating to the I/O bus.
directly configured by python. Move stuff from root.(cc|hh) to
core.(cc|hh) since it really belogs there now.
In the process, simplify how ticks are used in the python code.
--HG--
extra : convert_revision : cf82ee1ea20f9343924f30bacc2a38d4edee8df3
configs/example/fs.py:
make it an automatic system build for alpha vs. sparc.
--HG--
extra : convert_revision : 4c217cf9309c6209be7f80e358f6640857a785e8
configs/common/Simulation.py:
Atomic CPU now works properly with caches, so we don't have to do extra parsing to hook up caches only to the timing CPU.
However the O3CPU must always use caches, so a check for that must still exist.
Also change the switch_cpus to be placed at the system level, now that Steve changed how the IntrController gets its CPU.
configs/example/fs.py:
configs/example/se.py:
Atomic CPU now handles caches.
--HG--
extra : convert_revision : 534ded558ef96cafd76b4b5c5317bd8f4d05076e
configs/common/Simulation.py:
enable going from checkpoint into arbitrary CPU with or without caches.
--HG--
extra : convert_revision : 02e7ff8982fdb3a08bc609f89bd58df5b3a581b2
into zamp.eecs.umich.edu:/z/ktlim2/clean/newmem-busfix
configs/example/fs.py:
configs/example/se.py:
src/mem/tport.hh:
Hand merge.
--HG--
extra : convert_revision : b9df95534d43b3b311f24ae24717371d03d615bf
configs/example/fs.py:
configs/example/se.py:
src/cpu/simple/base.cc:
src/cpu/simple/base.hh:
src/cpu/simple/timing.cc:
src/cpu/simple_thread.cc:
src/cpu/simple_thread.hh:
src/cpu/thread_state.cc:
src/cpu/thread_state.hh:
tests/configs/o3-timing-mp.py:
tests/configs/o3-timing.py:
tests/configs/simple-atomic-mp.py:
tests/configs/simple-atomic.py:
tests/configs/simple-timing-mp.py:
tests/configs/simple-timing.py:
tests/configs/tsunami-simple-atomic-dual.py:
tests/configs/tsunami-simple-atomic.py:
tests/configs/tsunami-simple-timing-dual.py:
tests/configs/tsunami-simple-timing.py:
No need for mem parameter any more.
src/cpu/checker/cpu.cc:
Use new constructor for simple thread (no more MemObject parameter).
src/cpu/checker/cpu.hh:
Remove MemObject parameter.
src/cpu/memtest/memtest.hh:
Ports now take in their MemObject owner.
src/cpu/o3/alpha/cpu_builder.cc:
Remove mem parameter.
src/cpu/o3/alpha/cpu_impl.hh:
Remove memory parameter and clean up handling of TranslatingPort.
src/cpu/o3/cpu.cc:
src/cpu/o3/cpu.hh:
src/cpu/o3/fetch.hh:
src/cpu/o3/fetch_impl.hh:
src/cpu/o3/mips/cpu_builder.cc:
src/cpu/o3/mips/cpu_impl.hh:
src/cpu/o3/params.hh:
src/cpu/o3/thread_state.hh:
src/cpu/ozone/cpu.hh:
src/cpu/ozone/cpu_builder.cc:
src/cpu/ozone/cpu_impl.hh:
src/cpu/ozone/front_end.hh:
src/cpu/ozone/front_end_impl.hh:
src/cpu/ozone/lw_lsq.hh:
src/cpu/ozone/lw_lsq_impl.hh:
src/cpu/ozone/simple_params.hh:
src/cpu/ozone/thread_state.hh:
src/cpu/simple/atomic.cc:
Remove memory parameter.
--HG--
extra : convert_revision : 43cb44a33b31320d44b69679dcf646c0380d07d3
configs/example/fs.py:
factor out common code.
configs/example/se.py:
factor out common code
--HG--
extra : convert_revision : 72a1f653c84eae1b7d281e0a5e60ee116ad6b27d
1) rearrange the options to be in a nice logical order
2) add an option for what i call "standard switch", which is from simple->timing->detailed
3) change the client/server naming system to testsys/drivesys
4) make checkpointing code such that checkpoints taken from the command line override checkpoint instructions compiled into binaries.
5) add an option for maximum number of checkpoints - simulation will stop at max or maxtick, whichever is first
doesn't fully work because of a caching issue, but the python side of things i think should work - the counterpart of se.py does work.
i think i should factor out a lot of the common code in both, but i'll do that after this checkin, just to get this in the tree.
configs/example/fs.py:
1) rearrange the options to be in a nice logical order
2) add an option for what i call "standard switch", which is from simple->timing->detailed
3) change the client/server naming system to testsys/drivesys
4) make checkpointing code such that checkpoints taken from the command line override checkpoint instructions compiled into binaries.
5) add an option for maximum number of checkpoints - simulation will stop at max or maxtick, whichever is first
--HG--
extra : convert_revision : 078e22800ff83f6e950bf5cc6fb16a98320e7c51
configs/example/fs.py:
Add MOESI protocol to caches (uni coherence not quite working w/FS yet).
--HG--
extra : convert_revision : 7bef7d9c5b24bf7241cc810df692408837b06b86
configs/example/fs.py:
Add flag for MP server systems.
src/python/m5/objects/AlphaConsole.py:
src/python/m5/objects/IntrControl.py:
Change CPU from 'any' to 'cpu[0]' to work better with MP sytems.
tests/configs/tsunami-simple-atomic-dual.py:
tests/configs/tsunami-simple-timing-dual.py:
Don't need to set console & intrcontrol cpu
params anymore (default is fixed now).
--HG--
extra : convert_revision : 9417b12b1b395ff7d6a9f2894e4123923c754daf
into zamp.eecs.umich.edu:/z/ktlim2/clean/o3-merge/newmem
src/cpu/memtest/memtest.cc:
src/cpu/memtest/memtest.hh:
src/cpu/simple/timing.hh:
tests/configs/o3-timing-mp.py:
Hand merge.
--HG--
extra : convert_revision : a58cc439eb5e8f900d175ed8b5a85b6c8723e558
so you can restore by a command line like this:
m5.opt fs.py --checkpoint_dir="/my/ckpt/dir" -c 3
configs/example/fs.py:
add in checkpoint restoration option, you can restore a checkpoint by giving a directory, and then giving a checkpoint number, the earliest checkpoint is 1, the latest is N.
--HG--
extra : convert_revision : bf9c8d3265a3875cdfb6a878005baa7ae29af90d
configs/common/FSConfig.py:
configs/common/SysPaths.py:
configs/example/fs.py:
configs/example/se.py:
tests/configs/o3-timing-mp.py:
tests/configs/o3-timing.py:
Clean up configs by removing FullO3Config and instead using default values.
src/python/m5/objects/FUPool.py:
Add in default FUPool.
src/python/m5/objects/O3CPU.py:
Use defaults better. Also set checker parameters, and fix up a config bug.
--HG--
extra : convert_revision : 5fd0c000143f4881f10a9a575c3810dc97cb290b
