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-rw-r--r--src/common/mempool.cc137
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diff --git a/src/common/mempool.cc b/src/common/mempool.cc
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+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
+// vim: ts=8 sw=2 smarttab
+/*
+ * Ceph - scalable distributed file system
+ *
+ * Copyright (C) 2016 Allen Samuels <allen.samuels@sandisk.com>
+ *
+ * This is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License version 2.1, as published by the Free Software
+ * Foundation. See file COPYING.
+ *
+ */
+
+#include "include/mempool.h"
+#include "include/demangle.h"
+
+
+// default to debug_mode off
+bool mempool::debug_mode = false;
+
+// --------------------------------------------------------------
+
+mempool::pool_t& mempool::get_pool(mempool::pool_index_t ix)
+{
+ // We rely on this array being initialized before any invocation of
+ // this function, even if it is called by ctors in other compilation
+ // units that are being initialized before this compilation unit.
+ static mempool::pool_t table[num_pools];
+ return table[ix];
+}
+
+const char *mempool::get_pool_name(mempool::pool_index_t ix) {
+#define P(x) #x,
+ static const char *names[num_pools] = {
+ DEFINE_MEMORY_POOLS_HELPER(P)
+ };
+#undef P
+ return names[ix];
+}
+
+void mempool::dump(ceph::Formatter *f)
+{
+ stats_t total;
+ f->open_object_section("mempool"); // we need (dummy?) topmost section for
+ // JSON Formatter to print pool names. It omits them otherwise.
+ f->open_object_section("by_pool");
+ for (size_t i = 0; i < num_pools; ++i) {
+ const pool_t &pool = mempool::get_pool((pool_index_t)i);
+ f->open_object_section(get_pool_name((pool_index_t)i));
+ pool.dump(f, &total);
+ f->close_section();
+ }
+ f->close_section();
+ f->dump_object("total", total);
+ f->close_section();
+}
+
+void mempool::set_debug_mode(bool d)
+{
+ debug_mode = d;
+}
+
+// --------------------------------------------------------------
+// pool_t
+
+size_t mempool::pool_t::allocated_bytes() const
+{
+ ssize_t result = 0;
+ for (size_t i = 0; i < num_shards; ++i) {
+ result += shard[i].bytes;
+ }
+ if (result < 0) {
+ // we raced with some unbalanced allocations/deallocations
+ result = 0;
+ }
+ return (size_t) result;
+}
+
+size_t mempool::pool_t::allocated_items() const
+{
+ ssize_t result = 0;
+ for (size_t i = 0; i < num_shards; ++i) {
+ result += shard[i].items;
+ }
+ if (result < 0) {
+ // we raced with some unbalanced allocations/deallocations
+ result = 0;
+ }
+ return (size_t) result;
+}
+
+void mempool::pool_t::adjust_count(ssize_t items, ssize_t bytes)
+{
+ shard_t *shard = pick_a_shard();
+ shard->items += items;
+ shard->bytes += bytes;
+}
+
+void mempool::pool_t::get_stats(
+ stats_t *total,
+ std::map<std::string, stats_t> *by_type) const
+{
+ for (size_t i = 0; i < num_shards; ++i) {
+ total->items += shard[i].items;
+ total->bytes += shard[i].bytes;
+ }
+ if (debug_mode) {
+ std::lock_guard shard_lock(lock);
+ for (auto &p : type_map) {
+ std::string n = ceph_demangle(p.second.type_name);
+ stats_t &s = (*by_type)[n];
+ s.bytes = p.second.items * p.second.item_size;
+ s.items = p.second.items;
+ }
+ }
+}
+
+void mempool::pool_t::dump(ceph::Formatter *f, stats_t *ptotal) const
+{
+ stats_t total;
+ std::map<std::string, stats_t> by_type;
+ get_stats(&total, &by_type);
+ if (ptotal) {
+ *ptotal += total;
+ }
+ total.dump(f);
+ if (!by_type.empty()) {
+ f->open_object_section("by_type");
+ for (auto &i : by_type) {
+ f->open_object_section(i.first.c_str());
+ i.second.dump(f);
+ f->close_section();
+ }
+ f->close_section();
+ }
+}