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- count and report number of parallel collections
- calculate bytes scanned in addition to bytes copied per thread
- calculate "work balance factor"
- tidy up the formatting a bit
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Some objects don't need to be scavenged, in particular if they have no
pointers. This seems like an obvious optimisation, but in fact it
only accounts for about 1% of objects (in GHC, for example), and the
extra complication means it probably isn't worth doing.
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This patch still requires the addition of the USE_PAPI
define to compile with PAPI. Also, programs must be
compiled and linked with the appropriate library flags
for papi.
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A simple interface for generating trace messages with timestamps and
thread IDs attached to them. Most debugging output goes through this
interface now, so it is straightforward to get timestamped debugging
traces with +RTS -vt. Also, we plan to use this to generate
parallelism profiles from the trace output.
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Most of the other users of the fptools build system have migrated to
Cabal, and with the move to darcs we can now flatten the source tree
without losing history, so here goes.
The main change is that the ghc/ subdir is gone, and most of what it
contained is now at the top level. The build system now makes no
pretense at being multi-project, it is just the GHC build system.
No doubt this will break many things, and there will be a period of
instability while we fix the dependencies. A straightforward build
should work, but I haven't yet fixed binary/source distributions.
Changes to the Building Guide will follow, too.
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