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Change opt.metadata_thp to [disabled,auto,always].

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To avoid the high RSS caused by THP + low usage arena (i.e. THP becomes a
significant percentage), added a new "auto" option which will only start using
THP after a base allocator used up the first THP region.  Starting from the
second hugepage (in a single arena), "auto" behaves the same as "always",
i.e. madvise hugepage right away.
This commit is contained in:
Qi Wang
2017-08-24 14:29:28 -07:00
committed by Qi Wang
parent ea91dfa58e
commit 47b20bb654
10 changed files with 84 additions and 25 deletions
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3
src/ctl.c
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@@ -1570,7 +1570,8 @@ CTL_RO_CONFIG_GEN(config_xmalloc, bool)
CTL_RO_NL_GEN(opt_abort, opt_abort, bool)
CTL_RO_NL_GEN(opt_abort_conf, opt_abort_conf, bool)
CTL_RO_NL_GEN(opt_metadata_thp, opt_metadata_thp, bool)
CTL_RO_NL_GEN(opt_metadata_thp, metadata_thp_mode_names[opt_metadata_thp],
const char *)
CTL_RO_NL_GEN(opt_retain, opt_retain, bool)
CTL_RO_NL_GEN(opt_dss, opt_dss, const char *)
CTL_RO_NL_GEN(opt_narenas, opt_narenas, unsigned)