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rate_limit: Adds a --rate option for RPS limits
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/* | ||
* Licensed to the Apache Software Foundation (ASF) under one | ||
* or more contributor license agreements. See the NOTICE file | ||
* distributed with this work for additional information | ||
* regarding copyright ownership. The ASF licenses this file | ||
* to you under the Apache License, Version 2.0 (the | ||
* "License"); you may not use this file except in compliance | ||
* with the License. You may obtain a copy of the License at | ||
* | ||
* http://www.apache.org/licenses/LICENSE-2.0 | ||
* | ||
* Unless required by applicable law or agreed to in writing, software | ||
* distributed under the License is distributed on an "AS IS" BASIS, | ||
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
* See the License for the specific language governing permissions and | ||
* limitations under the License. | ||
*/ | ||
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#include "limiter.h" | ||
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// order must align with the above | ||
static const char *types[] = { | ||
"sni", | ||
"remap", | ||
}; | ||
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// Order should match the enum in limiter.h | ||
static const char *suffixes[] = { | ||
"queued", | ||
"rejected", | ||
"expired", | ||
"resumed", | ||
}; | ||
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BucketManager gBucketMngr; | ||
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// This function will run on the dedicated thread, until the global bucket manager is dead | ||
void | ||
BucketManager::refill_thread() | ||
{ | ||
while (_running) { | ||
auto startTime = std::chrono::steady_clock::now(); | ||
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{ | ||
std::lock_guard<std::mutex> lock(_mutex); | ||
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for (auto &bucket : _buckets) { | ||
bucket->refill(); | ||
} | ||
} | ||
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auto sleepTime = std::chrono::milliseconds(BUCKET_REFILL_INTERVAL) - (std::chrono::steady_clock::now() - startTime); | ||
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if (sleepTime > std::chrono::milliseconds(0)) { | ||
std::this_thread::sleep_for(sleepTime); | ||
} | ||
} | ||
} | ||
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void | ||
metric_helper(std::array<int, RATE_LIMITER_METRIC_MAX> &metrics, uint type, const std::string &tag, const std::string &name, | ||
const std::string &prefix) | ||
{ | ||
std::string metric_prefix = prefix; | ||
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metric_prefix.push_back('.'); | ||
metric_prefix.append(types[type]); | ||
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if (!tag.empty()) { | ||
metric_prefix.push_back('.'); | ||
metric_prefix.append(tag); | ||
} else if (!name.empty()) { | ||
metric_prefix.push_back('.'); | ||
metric_prefix.append(name); | ||
} | ||
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for (int i = 0; i < RATE_LIMITER_METRIC_MAX; i++) { | ||
size_t const metricsz = metric_prefix.length() + strlen(suffixes[i]) + 2; // padding for dot+terminator | ||
char *const metric = static_cast<char *>(TSmalloc(metricsz)); | ||
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snprintf(metric, metricsz, "%s.%s", metric_prefix.data(), suffixes[i]); | ||
metrics[i] = TS_ERROR; | ||
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if (TSStatFindName(metric, &metrics[i]) == TS_ERROR) { | ||
metrics[i] = TSStatCreate(metric, TS_RECORDDATATYPE_INT, TS_STAT_NON_PERSISTENT, TS_STAT_SYNC_SUM); | ||
} | ||
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if (metrics[i] != TS_ERROR) { | ||
Dbg(dbg_ctl, "established metric '%s' as ID %d", metric, metrics[i]); | ||
} else { | ||
TSError("failed to create metric '%s'", metric); | ||
} | ||
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TSfree(metric); | ||
} | ||
} |
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