#11645: Heap profiling - hp2ps: samples out of sequence -------------------------------------+------------------------------------- Reporter: thomie | Owner: Type: bug | Status: new Priority: normal | Milestone: Component: Profiling | Version: 8.0.1-rc2 Keywords: | Operating System: Unknown/Multiple Architecture: | Type of failure: None/Unknown Unknown/Multiple | Test Case: | Blocked By: Blocking: | Related Tickets: #664 Differential Rev(s): | Wiki Page: -------------------------------------+------------------------------------- `make TEST=hpc_fork WAY=prof` is failing, but it has nothing to do with `hpc`. {{{ hp2ps: hpc_fork.hp, line 9, samples out of sequence hp2ps error when processing heap profile for hpc_fork }}} hpc_fork.hs: {{{ module main where import system.posix.process import control.concurrent main = do pid1 <- forkprocess $ do threaddelay 100000 pid2 <- forkprocess $ do threaddelay 100000 print () }}} To reproduce: {{{ $ ghc-8.0.1 hpc_fork.hs -fforce-recomp -prof $ ./hpc_fork +RTS -hc $ hp2ps hpc_fork.hp }}} Example hpc_fork.hp: {{{ JOB "hpc_fork +RTS -hc" DATE "Thu Feb 25 22:37 2016" SAMPLE_UNIT "seconds" VALUE_UNIT "bytes" BEGIN_SAMPLE 0.000000 END_SAMPLE 0.000000 BEGIN_SAMPLE 0.005672 END_SAMPLE 0.005672 BEGIN_SAMPLE 0.003167 END_SAMPLE 0.003167 BEGIN_SAMPLE 0.003311 END_SAMPLE 0.003311 }}} This is a regression from 7.10.3. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/11645 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler