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| author | rwatson <rwatson@FreeBSD.org> | 2004-07-27 16:34:48 +0000 |
|---|---|---|
| committer | rwatson <rwatson@FreeBSD.org> | 2004-07-27 16:34:48 +0000 |
| commit | 1fea905f48b810e78f2b9c5eafe9cec45fcfdf2a (patch) | |
| tree | 4a46084745b159ef6305e1f8611e6177411c9b5d /sys/conf/options | |
| parent | 1c9892680c965f2cef6dfb2ebbb9fa53b110b4c3 (diff) | |
| download | FreeBSD-src-1fea905f48b810e78f2b9c5eafe9cec45fcfdf2a.zip FreeBSD-src-1fea905f48b810e78f2b9c5eafe9cec45fcfdf2a.tar.gz | |
Add "options ADAPTIVE_GIANT" which causes Giant to also be treated in
an adaptive fashion when adaptive mutexes are enabled. The theory
behind non-adaptive Giant is that Giant will be held for long periods
of time, and therefore spinning waiting on it is wasteful. However,
in MySQL benchmarks which are relatively Giant-free, running Giant
adaptive makes an observable difference on SMP (5% transaction rate
improvement). As such, make adaptive behavior on Giant an option so
it can be more widely benchmarked.
Diffstat (limited to 'sys/conf/options')
| -rw-r--r-- | sys/conf/options | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/sys/conf/options b/sys/conf/options index 63fb9b5..ef15023 100644 --- a/sys/conf/options +++ b/sys/conf/options @@ -56,6 +56,7 @@ KDB_TRACE opt_kdb.h KDB_UNATTENDED opt_kdb.h # Miscellaneous options. +ADAPTIVE_GIANT opt_adaptive_mutexes.h NO_ADAPTIVE_MUTEXES opt_adaptive_mutexes.h ALQ CODA_COMPAT_5 opt_coda.h |
