mirror of
https://github.com/matrix-construct/construct
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49 lines
1.9 KiB
C
49 lines
1.9 KiB
C
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// Matrix Construct
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//
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// Copyright (C) Matrix Construct Developers, Authors & Contributors
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// Copyright (C) 2016-2023 Jason Volk <jason@zemos.net>
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//
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// Permission to use, copy, modify, and/or distribute this software for any
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// purpose with or without fee is hereby granted, provided that the above
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// copyright notice and this permission notice is present in all copies. The
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// full license for this software is available in the LICENSE file.
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#pragma once
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#define HAVE_IRCD_ALLOCATOR_PROFILE_H
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namespace ircd::allocator
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{
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struct profile;
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profile &operator+=(profile &, const profile &);
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profile &operator-=(profile &, const profile &);
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profile operator+(const profile &, const profile &);
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profile operator-(const profile &, const profile &);
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}
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/// Profiling counters. The purpose of this device is to gauge whether unwanted
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/// or non-obvious allocations are taking place for a specific section. This
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/// profiler has that very specific purpose and is not a replacement for
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/// full-fledged memory profiling. This works by replacing global operator new
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/// and delete, not any deeper hooks on malloc() at this time. To operate this
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/// device you must first recompile and relink with RB_PROF_ALLOC defined at
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/// least for the ircd/allocator.cc unit.
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///
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/// 1. Create an instance by copying the this_thread variable which will
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/// snapshot the current counters.
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/// 2. At some later point, create a second instance by copying the
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/// this_thread variable again.
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/// 3. Use the arithmetic operators to compute the difference between the two
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/// snapshots and the result will be the count isolated between them.
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struct ircd::allocator::profile
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{
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uint64_t alloc_count {0};
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uint64_t free_count {0};
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size_t alloc_bytes {0};
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size_t free_bytes {0};
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/// Explicitly enabled by define at compile time only. Note: replaces
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/// global `new` and `delete` when enabled.
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static thread_local profile this_thread;
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};
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