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| author | Simon Marlow <marlowsd@gmail.com> | 2014-04-28 16:55:47 +0100 |
|---|---|---|
| committer | Simon Marlow <marlowsd@gmail.com> | 2014-05-02 14:49:22 +0100 |
| commit | b0534f78a73f972e279eed4447a5687bd6a8308e (patch) | |
| tree | 02d52756620bf27b9df9db45c57dacf55f190842 /utils | |
| parent | 34db5ccf52ec2a1b5e953c282d0c52a7fc82c02a (diff) | |
| download | haskell-b0534f78a73f972e279eed4447a5687bd6a8308e.tar.gz | |
Per-thread allocation counters and limits
This tracks the amount of memory allocation by each thread in a
counter stored in the TSO. Optionally, when the counter drops below
zero (it counts down), the thread can be sent an asynchronous
exception: AllocationLimitExceeded. When this happens, given a small
additional limit so that it can handle the exception. See
documentation in GHC.Conc for more details.
Allocation limits are similar to timeouts, but
- timeouts use real time, not CPU time. Allocation limits do not
count anything while the thread is blocked or in foreign code.
- timeouts don't re-trigger if the thread catches the exception,
allocation limits do.
- timeouts can catch non-allocating loops, if you use
-fno-omit-yields. This doesn't work for allocation limits.
I couldn't measure any impact on benchmarks with these changes, even
for nofib/smp.
Diffstat (limited to 'utils')
| -rw-r--r-- | utils/deriveConstants/DeriveConstants.hs | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/utils/deriveConstants/DeriveConstants.hs b/utils/deriveConstants/DeriveConstants.hs index 8c943f0584..0ed18bcf40 100644 --- a/utils/deriveConstants/DeriveConstants.hs +++ b/utils/deriveConstants/DeriveConstants.hs @@ -411,6 +411,7 @@ wanteds = concat ,closureField C "StgTSO" "flags" ,closureField C "StgTSO" "dirty" ,closureField C "StgTSO" "bq" + ,closureField Both "StgTSO" "alloc_limit" ,closureField_ Both "StgTSO_cccs" "StgTSO" "prof.cccs" ,closureField Both "StgTSO" "stackobj" |