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Remove ratio-based purging.

Browse source 
Make decay-based purging the default (and only) mode.

Remove associated mallctls:
- opt.purge
- opt.lg_dirty_mult
- arena.<i>.lg_dirty_mult
- arenas.lg_dirty_mult
- stats.arenas.<i>.lg_dirty_mult

This resolves #385.
This commit is contained in:
Jason Evans 2016-10-12 10:40:27 -07:00
parent b4b4a77848
commit 63b5657aa5
11 changed files with 38 additions and 485 deletions
Download patch file Download diff file Expand all files Collapse all files

52
src/stats.c
View file

@ -210,7 +210,7 @@ stats_arena_print(void (*write_cb)(void *, const char *), void *cbopaque,
{
unsigned nthreads;
const char *dss;
ssize_t lg_dirty_mult, decay_time;
ssize_t decay_time;
size_t page, pactive, pdirty, mapped, retained, metadata;
uint64_t npurge, nmadvise, purged;
size_t small_allocated;
@ -226,25 +226,12 @@ stats_arena_print(void (*write_cb)(void *, const char *), void *cbopaque,
CTL_M2_GET("stats.arenas.0.dss", i, &dss, const char *);
malloc_cprintf(write_cb, cbopaque, "dss allocation precedence: %s\n",
dss);
CTL_M2_GET("stats.arenas.0.lg_dirty_mult", i, &lg_dirty_mult, ssize_t);
if (opt_purge == purge_mode_ratio) {
if (lg_dirty_mult >= 0) {
malloc_cprintf(write_cb, cbopaque,
"min active:dirty page ratio: %u:1\n",
(1U << lg_dirty_mult));
} else {
malloc_cprintf(write_cb, cbopaque,
"min active:dirty page ratio: N/A\n");
}
}
CTL_M2_GET("stats.arenas.0.decay_time", i, &decay_time, ssize_t);
if (opt_purge == purge_mode_decay) {
if (decay_time >= 0) {
malloc_cprintf(write_cb, cbopaque, "decay time: %zd\n",
decay_time);
} else
malloc_cprintf(write_cb, cbopaque, "decay time: N/A\n");
}
if (decay_time >= 0) {
malloc_cprintf(write_cb, cbopaque, "decay time: %zd\n",
decay_time);
} else
malloc_cprintf(write_cb, cbopaque, "decay time: N/A\n");
CTL_M2_GET("stats.arenas.0.pactive", i, &pactive, size_t);
CTL_M2_GET("stats.arenas.0.pdirty", i, &pdirty, size_t);
CTL_M2_GET("stats.arenas.0.npurge", i, &npurge, uint64_t);
@ -433,12 +420,7 @@ stats_print(void (*write_cb)(void *, const char *), void *cbopaque,
OPT_WRITE_CHAR_P(dss)
OPT_WRITE_UNSIGNED(narenas)
OPT_WRITE_CHAR_P(purge)
if (opt_purge == purge_mode_ratio) {
OPT_WRITE_SSIZE_T_MUTABLE(lg_dirty_mult,
arenas.lg_dirty_mult)
}
if (opt_purge == purge_mode_decay)
OPT_WRITE_SSIZE_T_MUTABLE(decay_time, arenas.decay_time)
OPT_WRITE_SSIZE_T_MUTABLE(decay_time, arenas.decay_time)
OPT_WRITE_BOOL(stats_print)
OPT_WRITE_CHAR_P(junk)
OPT_WRITE_BOOL(zero)
@ -479,24 +461,10 @@ stats_print(void (*write_cb)(void *, const char *), void *cbopaque,
CTL_GET("arenas.page", &sv, size_t);
malloc_cprintf(write_cb, cbopaque, "Page size: %zu\n", sv);
CTL_GET("arenas.lg_dirty_mult", &ssv, ssize_t);
if (opt_purge == purge_mode_ratio) {
if (ssv >= 0) {
malloc_cprintf(write_cb, cbopaque,
"Min active:dirty page ratio per arena: "
"%u:1\n", (1U << ssv));
} else {
malloc_cprintf(write_cb, cbopaque,
"Min active:dirty page ratio per arena: "
"N/A\n");
}
}
CTL_GET("arenas.decay_time", &ssv, ssize_t);
if (opt_purge == purge_mode_decay) {
malloc_cprintf(write_cb, cbopaque,
"Unused dirty page decay time: %zd%s\n",
ssv, (ssv < 0) ? " (no decay)" : "");
}
malloc_cprintf(write_cb, cbopaque,
"Unused dirty page decay time: %zd%s\n", ssv, (ssv < 0) ?
" (no decay)" : "");
if (je_mallctl("arenas.tcache_max", &sv, &ssz, NULL, 0) == 0) {
malloc_cprintf(write_cb, cbopaque,
"Maximum thread-cached size class: %zu\n", sv);