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Implement dynamic per arena control over dirty page purging.

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Add mallctls:
- arenas.lg_dirty_mult is initialized via opt.lg_dirty_mult, and can be
  modified to change the initial lg_dirty_mult setting for newly created
  arenas.
- arena.<i>.lg_dirty_mult controls an individual arena's dirty page
  purging threshold, and synchronously triggers any purging that may be
  necessary to maintain the constraint.
- arena.<i>.chunk.purge allows the per arena dirty page purging function
  to be replaced.

This resolves #93.
This commit is contained in:
Jason Evans
2015-03-18 18:55:33 -07:00
parent c9db461ffb
commit 8d6a3e8321
13 changed files with 460 additions and 99 deletions
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10
test/unit/rtree.c
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@@ -22,7 +22,7 @@ TEST_BEGIN(test_rtree_get_empty)
rtree_t rtree;
assert_false(rtree_new(&rtree, i, node_alloc, node_dalloc),
"Unexpected rtree_new() failure");
assert_ptr_eq(rtree_get(&rtree, 0), NULL,
assert_ptr_null(rtree_get(&rtree, 0),
"rtree_get() should return NULL for empty tree");
rtree_delete(&rtree);
}
@@ -75,8 +75,8 @@ TEST_BEGIN(test_rtree_bits)
"get key=%#"PRIxPTR, i, j, k, keys[j],
keys[k]);
}
assert_ptr_eq(rtree_get(&rtree,
(((uintptr_t)1) << (sizeof(uintptr_t)*8-i))), NULL,
assert_ptr_null(rtree_get(&rtree,
(((uintptr_t)1) << (sizeof(uintptr_t)*8-i))),
"Only leftmost rtree leaf should be set; "
"i=%u, j=%u", i, j);
rtree_set(&rtree, keys[j], NULL);
@@ -117,11 +117,11 @@ TEST_BEGIN(test_rtree_random)
for (j = 0; j < NSET; j++) {
rtree_set(&rtree, keys[j], NULL);
assert_ptr_eq(rtree_get(&rtree, keys[j]), NULL,
assert_ptr_null(rtree_get(&rtree, keys[j]),
"rtree_get() should return previously set value");
}
for (j = 0; j < NSET; j++) {
assert_ptr_eq(rtree_get(&rtree, keys[j]), NULL,
assert_ptr_null(rtree_get(&rtree, keys[j]),
"rtree_get() should return previously set value");
}