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HPA: Hugification hysteresis.

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We wait a while after deciding a huge extent should get hugified to see if it
gets purged before long.  This avoids hugifying extents that might shortly get
dehugified for purging.

Rename and use the hpa_dehugification_threshold option support code for this,
since it's now ignored.
This commit is contained in:
David Goldblatt 2021-06-14 14:53:23 -07:00 • committed by David Goldblatt
parent 113938b6f4
commit 6630c59896
9 changed files with 234 additions and 60 deletions
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9
src/ctl.c
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@ -96,7 +96,7 @@ CTL_PROTO(opt_confirm_conf)
CTL_PROTO(opt_hpa)
CTL_PROTO(opt_hpa_slab_max_alloc)
CTL_PROTO(opt_hpa_hugification_threshold)
CTL_PROTO(opt_hpa_dehugification_threshold)
CTL_PROTO(opt_hpa_hugify_delay_ms)
CTL_PROTO(opt_hpa_dirty_mult)
CTL_PROTO(opt_hpa_sec_nshards)
CTL_PROTO(opt_hpa_sec_max_alloc)
@ -406,8 +406,7 @@ static const ctl_named_node_t opt_node[] = {
{NAME("hpa_slab_max_alloc"), CTL(opt_hpa_slab_max_alloc)},
{NAME("hpa_hugification_threshold"),
CTL(opt_hpa_hugification_threshold)},
{NAME("hpa_dehugification_threshold"),
CTL(opt_hpa_dehugification_threshold)},
{NAME("hpa_hugify_delay_ms"), CTL(opt_hpa_hugify_delay_ms)},
{NAME("hpa_dirty_mult"), CTL(opt_hpa_dirty_mult)},
{NAME("hpa_sec_nshards"), CTL(opt_hpa_sec_nshards)},
{NAME("hpa_sec_max_alloc"), CTL(opt_hpa_sec_max_alloc)},
@ -2114,8 +2113,8 @@ CTL_RO_NL_GEN(opt_confirm_conf, opt_confirm_conf, bool)
CTL_RO_NL_GEN(opt_hpa, opt_hpa, bool)
CTL_RO_NL_GEN(opt_hpa_hugification_threshold,
opt_hpa_opts.hugification_threshold, size_t)
CTL_RO_NL_GEN(opt_hpa_dehugification_threshold,
opt_hpa_opts.dehugification_threshold, size_t)
CTL_RO_NL_GEN(opt_hpa_hugify_delay_ms, opt_hpa_opts.hugify_delay_ms, uint64_t)
/*
* This will have to change before we publicly document this option; fxp_t and
* its representation are internal implementation details.