Opened 3 years ago

Last modified 8 months ago

#13225 new bug

Fannkuch-redux time regression from join point patch

Reported by: dfeuer Owned by:
Priority: normal Milestone: 8.10.1
Component: Compiler Version: 8.1
Keywords: JoinPoints Cc: nomeata, heisenbug, int-index, sibi
Operating System: Unknown/Multiple Architecture: Unknown/Multiple
Type of failure: Runtime performance bug Test Case:
Blocked By: Blocking:
Related Tickets: Differential Rev(s):
Wiki Page:

Description

According to Gipeda, the join point rework caused an impressive 99.9% drop in allocations in fannkuch-redux, but an 8.57% increase in its run-time. Looking at the graph, it appears that this is not just noise.

Change History (9)

comment:1 Changed 3 years ago by simonpj

join point rework caused an impressive 99.9% drop in allocations in fannkuch-redux, but an 8.57% increase in its run-time

That's is truly weird. It'd be good to understand why.

comment:2 Changed 3 years ago by nomeata

Cc: nomeata added

comment:3 Changed 3 years ago by heisenbug

Cc: heisenbug added

comment:4 Changed 3 years ago by int-index

Cc: int-index added

comment:5 Changed 3 years ago by sibi

Cc: sibi added

comment:6 Changed 19 months ago by bgamari

Milestone: 8.4.18.6.1

This ticket won't be resolved in 8.4; remilestoning for 8.6. Do holler if you are affected by this or would otherwise like to work on it.

comment:7 Changed 14 months ago by bgamari

This will not be addressed in GHC 8.6.

comment:8 Changed 14 months ago by bgamari

Milestone: 8.6.18.8.1

These will not be addressed in GHC 8.6.

comment:9 Changed 8 months ago by osa1

Milestone: 8.8.18.10.1

Bumping milestones of low-priority tickets.

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