--- /dev/null
+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
+// vim: ts=8 sw=2 smarttab
+/*
+ * Ceph - scalable distributed file system
+ *
+ * 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.
+ * Copyright 2013 Inktank
+ */
+
+#include "TrackedOp.h"
+
+#define dout_context cct
+#define dout_subsys ceph_subsys_optracker
+#undef dout_prefix
+#define dout_prefix _prefix(_dout)
+
+static ostream& _prefix(std::ostream* _dout)
+{
+ return *_dout << "-- op tracker -- ";
+}
+
+void OpHistory::on_shutdown()
+{
+ Mutex::Locker history_lock(ops_history_lock);
+ arrived.clear();
+ duration.clear();
+ slow_op.clear();
+ shutdown = true;
+}
+
+void OpHistory::insert(utime_t now, TrackedOpRef op)
+{
+ Mutex::Locker history_lock(ops_history_lock);
+ if (shutdown)
+ return;
+ duration.insert(make_pair(op->get_duration(), op));
+ arrived.insert(make_pair(op->get_initiated(), op));
+ if (op->get_duration() >= history_slow_op_threshold)
+ slow_op.insert(make_pair(op->get_initiated(), op));
+ cleanup(now);
+}
+
+void OpHistory::cleanup(utime_t now)
+{
+ while (arrived.size() &&
+ (now - arrived.begin()->first >
+ (double)(history_duration))) {
+ duration.erase(make_pair(
+ arrived.begin()->second->get_duration(),
+ arrived.begin()->second));
+ arrived.erase(arrived.begin());
+ }
+
+ while (duration.size() > history_size) {
+ arrived.erase(make_pair(
+ duration.begin()->second->get_initiated(),
+ duration.begin()->second));
+ duration.erase(duration.begin());
+ }
+
+ while (slow_op.size() > history_slow_op_size) {
+ slow_op.erase(make_pair(
+ slow_op.begin()->second->get_initiated(),
+ slow_op.begin()->second));
+ }
+}
+
+void OpHistory::dump_ops(utime_t now, Formatter *f, set<string> filters)
+{
+ Mutex::Locker history_lock(ops_history_lock);
+ cleanup(now);
+ f->open_object_section("op_history");
+ f->dump_int("size", history_size);
+ f->dump_int("duration", history_duration);
+ {
+ f->open_array_section("ops");
+ for (set<pair<utime_t, TrackedOpRef> >::const_iterator i =
+ arrived.begin();
+ i != arrived.end();
+ ++i) {
+ if (!i->second->filter_out(filters))
+ continue;
+ f->open_object_section("op");
+ i->second->dump(now, f);
+ f->close_section();
+ }
+ f->close_section();
+ }
+ f->close_section();
+}
+
+void OpHistory::dump_ops_by_duration(utime_t now, Formatter *f, set<string> filters)
+{
+ Mutex::Locker history_lock(ops_history_lock);
+ cleanup(now);
+ f->open_object_section("op_history");
+ f->dump_int("size", history_size);
+ f->dump_int("duration", history_duration);
+ {
+ f->open_array_section("ops");
+ if (arrived.size()) {
+ vector<pair<double, TrackedOpRef> > durationvec;
+ durationvec.reserve(arrived.size());
+
+ for (set<pair<utime_t, TrackedOpRef> >::const_iterator i =
+ arrived.begin();
+ i != arrived.end();
+ ++i) {
+ if (!i->second->filter_out(filters))
+ continue;
+ durationvec.push_back(pair<double, TrackedOpRef>(i->second->get_duration(), i->second));
+ }
+
+ sort(durationvec.begin(), durationvec.end());
+
+ for (auto i = durationvec.rbegin(); i != durationvec.rend(); ++i) {
+ f->open_object_section("op");
+ i->second->dump(now, f);
+ f->close_section();
+ }
+ }
+ f->close_section();
+ }
+ f->close_section();
+}
+
+struct ShardedTrackingData {
+ Mutex ops_in_flight_lock_sharded;
+ TrackedOp::tracked_op_list_t ops_in_flight_sharded;
+ explicit ShardedTrackingData(string lock_name):
+ ops_in_flight_lock_sharded(lock_name.c_str()) {}
+};
+
+OpTracker::OpTracker(CephContext *cct_, bool tracking, uint32_t num_shards):
+ seq(0),
+ num_optracker_shards(num_shards),
+ complaint_time(0), log_threshold(0),
+ tracking_enabled(tracking),
+ lock("OpTracker::lock"), cct(cct_) {
+ for (uint32_t i = 0; i < num_optracker_shards; i++) {
+ char lock_name[32] = {0};
+ snprintf(lock_name, sizeof(lock_name), "%s:%d", "OpTracker::ShardedLock", i);
+ ShardedTrackingData* one_shard = new ShardedTrackingData(lock_name);
+ sharded_in_flight_list.push_back(one_shard);
+ }
+}
+
+OpTracker::~OpTracker() {
+ while (!sharded_in_flight_list.empty()) {
+ assert((sharded_in_flight_list.back())->ops_in_flight_sharded.empty());
+ delete sharded_in_flight_list.back();
+ sharded_in_flight_list.pop_back();
+ }
+}
+
+bool OpTracker::dump_historic_ops(Formatter *f, bool by_duration, set<string> filters)
+{
+ RWLock::RLocker l(lock);
+ if (!tracking_enabled)
+ return false;
+
+ utime_t now = ceph_clock_now();
+ if (by_duration) {
+ history.dump_ops_by_duration(now, f, filters);
+ } else {
+ history.dump_ops(now, f, filters);
+ }
+ return true;
+}
+
+void OpHistory::dump_slow_ops(utime_t now, Formatter *f, set<string> filters)
+{
+ Mutex::Locker history_lock(ops_history_lock);
+ cleanup(now);
+ f->open_object_section("OpHistory slow ops");
+ f->dump_int("num to keep", history_slow_op_size);
+ f->dump_int("threshold to keep", history_slow_op_threshold);
+ {
+ f->open_array_section("Ops");
+ for (set<pair<utime_t, TrackedOpRef> >::const_iterator i =
+ slow_op.begin();
+ i != slow_op.end();
+ ++i) {
+ if (!i->second->filter_out(filters))
+ continue;
+ f->open_object_section("Op");
+ i->second->dump(now, f);
+ f->close_section();
+ }
+ f->close_section();
+ }
+ f->close_section();
+}
+
+bool OpTracker::dump_historic_slow_ops(Formatter *f, set<string> filters)
+{
+ RWLock::RLocker l(lock);
+ if (!tracking_enabled)
+ return false;
+
+ utime_t now = ceph_clock_now();
+ history.dump_slow_ops(now, f, filters);
+ return true;
+}
+
+bool OpTracker::dump_ops_in_flight(Formatter *f, bool print_only_blocked, set<string> filters)
+{
+ RWLock::RLocker l(lock);
+ if (!tracking_enabled)
+ return false;
+
+ f->open_object_section("ops_in_flight"); // overall dump
+ uint64_t total_ops_in_flight = 0;
+ f->open_array_section("ops"); // list of TrackedOps
+ utime_t now = ceph_clock_now();
+ for (uint32_t i = 0; i < num_optracker_shards; i++) {
+ ShardedTrackingData* sdata = sharded_in_flight_list[i];
+ assert(NULL != sdata);
+ Mutex::Locker locker(sdata->ops_in_flight_lock_sharded);
+ for (auto& op : sdata->ops_in_flight_sharded) {
+ if (print_only_blocked && (now - op.get_initiated() <= complaint_time))
+ break;
+ if (!op.filter_out(filters))
+ continue;
+ f->open_object_section("op");
+ op.dump(now, f);
+ f->close_section(); // this TrackedOp
+ total_ops_in_flight++;
+ }
+ }
+ f->close_section(); // list of TrackedOps
+ if (print_only_blocked) {
+ f->dump_float("complaint_time", complaint_time);
+ f->dump_int("num_blocked_ops", total_ops_in_flight);
+ } else
+ f->dump_int("num_ops", total_ops_in_flight);
+ f->close_section(); // overall dump
+ return true;
+}
+
+bool OpTracker::register_inflight_op(TrackedOp *i)
+{
+ RWLock::RLocker l(lock);
+ if (!tracking_enabled)
+ return false;
+
+ uint64_t current_seq = ++seq;
+ uint32_t shard_index = current_seq % num_optracker_shards;
+ ShardedTrackingData* sdata = sharded_in_flight_list[shard_index];
+ assert(NULL != sdata);
+ {
+ Mutex::Locker locker(sdata->ops_in_flight_lock_sharded);
+ sdata->ops_in_flight_sharded.push_back(*i);
+ i->seq = current_seq;
+ }
+ return true;
+}
+
+void OpTracker::unregister_inflight_op(TrackedOp *i)
+{
+ // caller checks;
+ assert(i->state);
+
+ uint32_t shard_index = i->seq % num_optracker_shards;
+ ShardedTrackingData* sdata = sharded_in_flight_list[shard_index];
+ assert(NULL != sdata);
+ {
+ Mutex::Locker locker(sdata->ops_in_flight_lock_sharded);
+ auto p = sdata->ops_in_flight_sharded.iterator_to(*i);
+ sdata->ops_in_flight_sharded.erase(p);
+ }
+ i->_unregistered();
+
+ RWLock::RLocker l(lock);
+ if (!tracking_enabled)
+ delete i;
+ else {
+ i->state = TrackedOp::STATE_HISTORY;
+ utime_t now = ceph_clock_now();
+ history.insert(now, TrackedOpRef(i));
+ }
+}
+
+bool OpTracker::check_ops_in_flight(std::vector<string> &warning_vector, int *slow)
+{
+ RWLock::RLocker l(lock);
+ if (!tracking_enabled)
+ return false;
+
+ utime_t now = ceph_clock_now();
+ utime_t too_old = now;
+ too_old -= complaint_time;
+ utime_t oldest_op = now;
+ uint64_t total_ops_in_flight = 0;
+
+ for (uint32_t i = 0; i < num_optracker_shards; i++) {
+ ShardedTrackingData* sdata = sharded_in_flight_list[i];
+ assert(NULL != sdata);
+ Mutex::Locker locker(sdata->ops_in_flight_lock_sharded);
+ if (!sdata->ops_in_flight_sharded.empty()) {
+ utime_t oldest_op_tmp =
+ sdata->ops_in_flight_sharded.front().get_initiated();
+ if (oldest_op_tmp < oldest_op) {
+ oldest_op = oldest_op_tmp;
+ }
+ }
+ total_ops_in_flight += sdata->ops_in_flight_sharded.size();
+ }
+
+ if (0 == total_ops_in_flight)
+ return false;
+
+ utime_t oldest_secs = now - oldest_op;
+
+ dout(10) << "ops_in_flight.size: " << total_ops_in_flight
+ << "; oldest is " << oldest_secs
+ << " seconds old" << dendl;
+
+ if (oldest_secs < complaint_time)
+ return false;
+
+ warning_vector.reserve(log_threshold + 1);
+ //store summary message
+ warning_vector.push_back("");
+
+ int _slow = 0; // total slow
+ if (!slow)
+ slow = &_slow;
+ else
+ *slow = _slow; // start from 0 anyway
+ int warned = 0; // total logged
+ for (uint32_t iter = 0; iter < num_optracker_shards; iter++) {
+ ShardedTrackingData* sdata = sharded_in_flight_list[iter];
+ assert(NULL != sdata);
+ Mutex::Locker locker(sdata->ops_in_flight_lock_sharded);
+ if (sdata->ops_in_flight_sharded.empty())
+ continue;
+ auto i = sdata->ops_in_flight_sharded.begin();
+ while (i != sdata->ops_in_flight_sharded.end() &&
+ i->get_initiated() < too_old) {
+ (*slow)++;
+
+ // exponential backoff of warning intervals
+ if (warned < log_threshold &&
+ (i->get_initiated() + (complaint_time *
+ i->warn_interval_multiplier)) < now) {
+ // will warn, increase counter
+ warned++;
+
+ utime_t age = now - i->get_initiated();
+ stringstream ss;
+ ss << "slow request " << age << " seconds old, received at "
+ << i->get_initiated() << ": " << i->get_desc()
+ << " currently "
+ << (i->current ? i->current : i->state_string());
+ warning_vector.push_back(ss.str());
+
+ // only those that have been shown will backoff
+ i->warn_interval_multiplier *= 2;
+ }
+ ++i;
+ }
+ }
+
+ // only summarize if we warn about any. if everything has backed
+ // off, we will stay silent.
+ if (warned > 0) {
+ stringstream ss;
+ ss << *slow << " slow requests, " << warned << " included below; oldest blocked for > "
+ << oldest_secs << " secs";
+ warning_vector[0] = ss.str();
+ }
+
+ return warned > 0;
+}
+
+void OpTracker::get_age_ms_histogram(pow2_hist_t *h)
+{
+ h->clear();
+ utime_t now = ceph_clock_now();
+
+ for (uint32_t iter = 0; iter < num_optracker_shards; iter++) {
+ ShardedTrackingData* sdata = sharded_in_flight_list[iter];
+ assert(NULL != sdata);
+ Mutex::Locker locker(sdata->ops_in_flight_lock_sharded);
+
+ for (auto& i : sdata->ops_in_flight_sharded) {
+ utime_t age = now - i.get_initiated();
+ uint32_t ms = (long)(age * 1000.0);
+ h->add(ms);
+ }
+ }
+}
+
+
+#undef dout_context
+#define dout_context tracker->cct
+
+void TrackedOp::mark_event_string(const string &event, utime_t stamp)
+{
+ if (!state)
+ return;
+
+ {
+ Mutex::Locker l(lock);
+ events.push_back(Event(stamp, event));
+ current = events.back().c_str();
+ }
+ dout(6) << " seq: " << seq
+ << ", time: " << stamp
+ << ", event: " << event
+ << ", op: " << get_desc()
+ << dendl;
+ _event_marked();
+}
+
+void TrackedOp::mark_event(const char *event, utime_t stamp)
+{
+ if (!state)
+ return;
+
+ {
+ Mutex::Locker l(lock);
+ events.push_back(Event(stamp, event));
+ current = event;
+ }
+ dout(6) << " seq: " << seq
+ << ", time: " << stamp
+ << ", event: " << event
+ << ", op: " << get_desc()
+ << dendl;
+ _event_marked();
+}
+
+void TrackedOp::dump(utime_t now, Formatter *f) const
+{
+ // Ignore if still in the constructor
+ if (!state)
+ return;
+ f->dump_string("description", get_desc());
+ f->dump_stream("initiated_at") << get_initiated();
+ f->dump_float("age", now - get_initiated());
+ f->dump_float("duration", get_duration());
+ {
+ f->open_object_section("type_data");
+ _dump(f);
+ f->close_section();
+ }
+}
Code Review / stor4nfv.git / blobdiff