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xo-alloc2: ++ documentation + threshold size for THP feature

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This commit is contained in:
Roland Conybeare 2025-12-23 21:06:38 -05:00
commit 289751d3fd
18 changed files with 642 additions and 192 deletions
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76
utest/arena.test.cpp
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@ -8,9 +8,10 @@
//#include "xo/alloc2/DArena.hpp"
#include "xo/alloc2/arena/IAllocator_DArena.hpp"
//#include "xo/alloc2/alloc/RAllocator.hpp"
#include "xo/alloc2/print.hpp"
#include "xo/alloc2/padding.hpp"
#include "xo/indentlog/scope.hpp"
#include "xo/facet/obj.hpp"
#include <xo/facet/obj.hpp>
#include <xo/indentlog/scope.hpp>
#include <catch2/catch.hpp>
namespace xo {
@ -37,12 +38,55 @@ namespace xo {
REQUIRE(IAllocator_Xfer<DArena, IAllocator_DArena>::_valid);
}
TEST_CASE("DArena", "[alloc2][DArena]")
TEST_CASE("DArena-tiny", "[alloc2][DArena]")
{
ArenaConfig cfg { .name_ = "testarena",
.size_ = 1 };
DArena arena = DArena::map(cfg);
REQUIRE(arena.config_.name_ == cfg.name_);
REQUIRE(arena.lo_ != nullptr);
REQUIRE(arena.free_ == arena.lo_);
REQUIRE(arena.limit_ == arena.lo_);
REQUIRE(arena.hi_ != nullptr);
REQUIRE(arena.hi_ > arena.lo_);
REQUIRE(((size_t)arena.hi_ - (size_t)arena.lo_) % arena.page_z_ == 0);
REQUIRE(arena.lo_ + cfg.size_ <= arena.hi_);
/* verify arena.lo_ is aligned on a page boundary */
REQUIRE(((size_t)(arena.lo_) & (arena.page_z_ - 1)) == 0);
/* verify arena.hi_ is aligned on a hugepage boundary */
REQUIRE(((size_t)(arena.hi_) & (arena.page_z_ - 1)) == 0);
byte * lo = arena.lo_;
byte * free = arena.free_;
byte * limit = arena.limit_;
byte * hi = arena.hi_;
size_t committed_z = arena.committed_z_;
DArena arena2 = std::move(arena);
REQUIRE(arena.lo_ == nullptr);
REQUIRE(arena.free_ == nullptr);
REQUIRE(arena.limit_ == nullptr);
REQUIRE(arena.hi_ == nullptr);
REQUIRE(arena.committed_z_ == 0);
REQUIRE(arena.lo_ == nullptr);
REQUIRE(arena2.lo_ == lo);
REQUIRE(arena2.free_ == free);
REQUIRE(arena2.limit_ == limit);
REQUIRE(arena2.hi_ == hi);
REQUIRE(arena2.committed_z_ == committed_z);
}
TEST_CASE("DArena-medium", "[alloc2][DArena]")
{
ArenaConfig cfg { .name_ = "testarena",
.size_ = 10*1024*1024 };
DArena arena = DArena::map(cfg);
REQUIRE(arena.config_.name_ == cfg.name_);
REQUIRE(arena.lo_ != nullptr);
REQUIRE(arena.free_ == arena.lo_);
@ -52,7 +96,7 @@ namespace xo {
REQUIRE(((size_t)arena.hi_ - (size_t)arena.lo_) % cfg.hugepage_z_ == 0);
REQUIRE(arena.lo_ + cfg.size_ <= arena.hi_);
/* verify arena.lo_ is aligned on a hugepage boundary */
/* verify arena.lo_ is aligned on a page boundary */
REQUIRE(((size_t)(arena.lo_) & (cfg.hugepage_z_ - 1)) == 0);
/* verify arena.hi_ is aligned on a hugepage boundary */
@ -103,8 +147,8 @@ namespace xo {
== xo::facet::FacetImplType<AAllocator, DArena>::s_typeseq);
REQUIRE(a1o.name() == cfg.name_);
REQUIRE(a1o.reserved() >= cfg.size_);
REQUIRE(a1o.reserved() < cfg.size_ + cfg.hugepage_z_);
REQUIRE(a1o.reserved() % cfg.hugepage_z_ == 0);
REQUIRE(a1o.reserved() < cfg.size_ + a1o.data()->page_z_);
REQUIRE(a1o.reserved() % a1o.data()->page_z_ == 0);
REQUIRE(a1o.size() == 0);
REQUIRE(a1o.committed() == 0);
REQUIRE(a1o.allocated() == 0);
@ -123,11 +167,15 @@ namespace xo {
REQUIRE(a1o.allocated() == 0);
size_t z2 = 512;
REQUIRE(a1o.expand(z2));
bool ok = a1o.expand(z2);
REQUIRE(a1o.reserved() % cfg.hugepage_z_ == 0);
INFO(xtag("last_error", a1o.last_error()));
REQUIRE(ok);
REQUIRE(a1o.reserved() % a1o.data()->page_z_ == 0);
REQUIRE(a1o.committed() >= z2);
REQUIRE(a1o.committed() % cfg.hugepage_z_ == 0);
REQUIRE(a1o.committed() % a1o.data()->page_z_ == 0);
/* .size() is synonym for .committed() */
REQUIRE(a1o.size() == a1o.committed());
REQUIRE(a1o.available() >= z2);
@ -154,7 +202,7 @@ namespace xo {
byte * m0 = a1o.alloc(1);
REQUIRE(m0);
REQUIRE(a1o.last_error().error_ == error::none);
REQUIRE(a1o.last_error().error_ == error::ok);
REQUIRE(a1o.last_error().error_seq_ == 0);
REQUIRE(a1o.allocated() >= z0);
REQUIRE(a1o.allocated() < z0 + padding::c_alloc_alignment );
@ -166,7 +214,7 @@ namespace xo {
byte * m1 = a1o.alloc(z1);
REQUIRE(m1);
REQUIRE(a1o.last_error().error_ == error::none);
REQUIRE(a1o.last_error().error_ == error::ok);
REQUIRE(a1o.last_error().error_seq_ == 0);
REQUIRE(a1o.allocated() >= z0 + z1);
REQUIRE(a1o.allocated() < z0 + z1 + 2 * padding::c_alloc_alignment );
@ -209,7 +257,7 @@ namespace xo {
REQUIRE(a1o.contains(header));
REQUIRE(cfg.header_.size(*header) == padding::with_padding(z0));
//REQUIRE(((*header) & cfg.header_size_mask_) == padding::with_padding(z0));
REQUIRE(a1o.last_error().error_ == error::none);
REQUIRE(a1o.last_error().error_ == error::ok);
REQUIRE(a1o.last_error().error_seq_ == 0);
REQUIRE(a1o.allocated() >= z0);
REQUIRE(a1o.allocated() < sizeof(AAllocator::header_type) + z0 + padding::c_alloc_alignment );
@ -265,7 +313,7 @@ namespace xo {
REQUIRE(cfg.header_.size(*header) == padding::with_padding(z0));
//REQUIRE(((*header) & cfg.header_size_mask_) == padding::with_padding(z0));
REQUIRE(a1o.last_error().error_ == error::none);
REQUIRE(a1o.last_error().error_ == error::ok);
REQUIRE(a1o.last_error().error_seq_ == 0);
REQUIRE(a1o.allocated() == (cfg.header_.guard_z_
@ -306,7 +354,7 @@ namespace xo {
REQUIRE(err.request_z_ >= z0);
REQUIRE(err.request_z_ < z0 + padding::c_alloc_alignment);
REQUIRE(err.committed_z_ == 0);
REQUIRE(err.reserved_z_ == cfg.hugepage_z_);
REQUIRE(err.reserved_z_ == arena.reserved());
}
} /*namespace ut*/
} /*namespace xo*/