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This is an automatically generated e-mail. To reply, visit:
http://reviews.gem5.org/r/2289/
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Review request for Default.
Repository: gem5
Description
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Changeset 10243:d3d991a90faa
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power: Add basic DVFS support for gem5
Adds DVFS capabilities to gem5, by allowing users to specify lists for
frequencies and voltages in SrcClockDomains and VoltageDomains respectively.
A separate component, DVFSHandler, provides a small interface to change
operating points of the associated domains.
Clock domains will be linked to voltage domains and thus allow separate clock,
but shared voltage lines.
Currently all the valid performance-level updates are performed with a fixed
transition latency as specified for the domain.
Config file example:
...
vd = VoltageDomain(voltage = ['1V','0.95V','0.90V','0.85V'])
tsys.cluster1.clk_domain.clock = ['1GHz','700MHz','400MHz','230MHz']
tsys.cluster2.clk_domain.clock = ['1GHz','700MHz','400MHz','230MHz']
tsys.cluster1.clk_domain.domain_id = 0
tsys.cluster2.clk_domain.domain_id = 1
tsys.cluster1.clk_domain.voltage_domain = vd
tsys.cluster2.clk_domain.voltage_domain = vd
tsys.dvfs_handler.domains = [tsys.cluster1.clk_domain,
tsys.cluster2.clk_domain]
tsys.dvfs_handler.enable = True
Diffs
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src/arch/alpha/AlphaSystem.py b21b3aad6bd1
src/arch/mips/MipsSystem.py b21b3aad6bd1
src/sim/ClockDomain.py b21b3aad6bd1
src/sim/DVFSHandler.py PRE-CREATION
src/sim/SConscript b21b3aad6bd1
src/sim/System.py b21b3aad6bd1
src/sim/VoltageDomain.py b21b3aad6bd1
src/sim/clock_domain.hh b21b3aad6bd1
src/sim/clock_domain.cc b21b3aad6bd1
src/sim/dvfs_handler.hh PRE-CREATION
src/sim/dvfs_handler.cc PRE-CREATION
src/sim/eventq.hh b21b3aad6bd1
src/sim/voltage_domain.hh b21b3aad6bd1
src/sim/voltage_domain.cc b21b3aad6bd1
Diff: http://reviews.gem5.org/r/2289/diff/
Testing
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All regressions pass.
Btw, note that the power keyword is now overloaded. Suggestions are welcome.
Thanks,
Andreas Hansson
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