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38 lines
1.3 KiB
C++
38 lines
1.3 KiB
C++
//===-- common.cpp ----------------------------------------------*- C++ -*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#include "rss_limit_checker.h"
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#include "atomic_helpers.h"
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#include "string_utils.h"
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namespace scudo {
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void RssLimitChecker::check(u64 NextCheck) {
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// The interval for the checks is 250ms.
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static constexpr u64 CheckInterval = 250 * 1000000;
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// Early return in case another thread already did the calculation.
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if (!atomic_compare_exchange_strong(&RssNextCheckAtNS, &NextCheck,
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getMonotonicTime() + CheckInterval,
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memory_order_relaxed)) {
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return;
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}
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const uptr CurrentRssMb = GetRSS() >> 20;
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RssLimitExceeded Result = RssLimitExceeded::Neither;
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if (UNLIKELY(HardRssLimitMb && HardRssLimitMb < CurrentRssMb))
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Result = RssLimitExceeded::Hard;
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else if (UNLIKELY(SoftRssLimitMb && SoftRssLimitMb < CurrentRssMb))
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Result = RssLimitExceeded::Soft;
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atomic_store_relaxed(&RssLimitStatus, static_cast<u8>(Result));
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}
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} // namespace scudo
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