103 lines
2.5 KiB
C++
103 lines
2.5 KiB
C++
/*
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* Copyright (c) 2016 MariaDB Corporation Ab
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*
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* Use of this software is governed by the Business Source License included
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* in the LICENSE.TXT file and at www.mariadb.com/bsl11.
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*
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* Change Date: 2024-03-10
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*
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* On the date above, in accordance with the Business Source License, use
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* of this software will be governed by version 2 or later of the General
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* Public License.
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*/
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#include <maxscale/response_stat.hh>
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#include <algorithm>
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namespace maxscale
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{
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ResponseStat::ResponseStat(int num_filter_samples,
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maxbase::Duration sync_duration)
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: m_num_filter_samples {num_filter_samples}
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, m_sync_duration{sync_duration}
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, m_sample_count{0}
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, m_samples(num_filter_samples)
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, m_last_start{maxbase::TimePoint()}
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, m_next_sync{maxbase::Clock::now() + sync_duration}
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{
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}
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void ResponseStat::query_started()
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{
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m_last_start = maxbase::Clock::now();
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}
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void ResponseStat::query_ended()
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{
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if (m_last_start == maxbase::TimePoint())
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{
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// m_last_start is defaulted. Ignore, avoids extra logic at call sites.
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return;
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}
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m_samples[m_sample_count] = maxbase::Clock::now() - m_last_start;
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if (++m_sample_count == m_num_filter_samples)
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{
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std::sort(m_samples.begin(), m_samples.end());
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maxbase::Duration new_sample = m_samples[m_num_filter_samples / 2];
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m_average.add(std::chrono::duration<double>(new_sample).count());
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m_sample_count = 0;
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}
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m_last_start = maxbase::TimePoint();
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}
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bool ResponseStat::make_valid()
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{
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if (!m_average.num_samples() && m_sample_count)
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{
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std::sort(m_samples.begin(), m_samples.begin() + m_sample_count);
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maxbase::Duration new_sample = m_samples[m_sample_count / 2];
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m_average.add(std::chrono::duration<double>(new_sample).count());
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m_sample_count = 0;
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m_last_start = maxbase::TimePoint();
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}
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return is_valid();
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}
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bool ResponseStat::is_valid() const
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{
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return m_average.num_samples();
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}
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int ResponseStat::num_samples() const
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{
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return m_average.num_samples();
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}
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maxbase::Duration ResponseStat::average() const
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{
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return maxbase::Duration(m_average.average());
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}
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bool ResponseStat::sync_time_reached()
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{
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auto now = maxbase::Clock::now();
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bool reached = m_next_sync < now;
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if (reached)
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{
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m_next_sync = now + m_sync_duration;
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}
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return reached;
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}
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void ResponseStat::reset()
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{
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m_sample_count = 0;
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m_average.reset();
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m_next_sync = maxbase::Clock::now() + m_sync_duration;
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}
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}
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