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The current Set data structure is slow and therefore is being reimplemented
using std::bitset. A maximum limit of 64 is being set on the number of
controllers of each type. This means that for simulating a system with more
controllers of a given type, one would need to change the value of the variable
NUMBER_BITS_PER_SET
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UBSan complains about negative value being shifted
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This patch tidies up random number generation to ensure that it is
done consistently throughout the code base. In essence this involves a
clean-up of Ruby, and some code simplifications in the traffic
generator.
As part of this patch a bunch of skewed distributions (off-by-one etc)
have been fixed.
Note that a single global random number generator is used, and that
the object instantiation order will impact the behaviour (the sequence
of numbers will be unaffected, but if module A calles random before
module B then they would obviously see a different outcome). The
dependency on the instantiation order is true in any case due to the
execution-model of gem5, so we leave it as is. Also note that the
global ranom generator is not thread safe at this point.
Regressions using the memtest, TrafficGen or any Ruby tester are
affected and will be updated accordingly.
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This patch fixes a compilation error caused by a length mismatch on
32-bit hosts. The ifdef and sprintf is replaced by a csprintf.
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Get rid of the Debug class
Get rid of ASSERT and use assert
Use DPRINTFR for ProtocolTrace
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file. These statements have been replaced with warn(), panic() and fatal() defined in src/base/misc.hh
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Further cleanup should probably be done to make this class be non-Ruby
specific and put it in src/base.
There are probably several cases where this class is used, std::bitset
could be used instead.
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In addition to obvious changes, this required a slight change to the slicc
grammar to allow types with :: in them. Otherwise slicc barfs on std::string
which we need for the headers that slicc generates.
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removed the static function RubySystem::getNumberOfSequencers and replaced
it with a python config variable
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This is necessary for example when no dma sequencers are necessary in the
simulated system.
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This was done with an automated process, so there could be things that were
done in this tree in the past that didn't make it. One known regression
is that atomic memory operations do not seem to work properly anymore.
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1. Set.* and BigSet.* are replaced with OptBigSet.* which was renamed Set.*
2. Decomissioned all bloom filters
3. Decomissioned ruby/simics directory
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This basically means changing all #include statements and changing
autogenerated code so that it generates the correct paths. Because
slicc generates #includes, I had to hard code the include paths to
mem/protocol.
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We eventually plan to replace the m5 cache hierarchy with the GEMS
hierarchy, but for now we will make both live alongside eachother.
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