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// -*- 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"
#include "common/Formatter.h"
#include <iostream>
#include <vector>
#include "common/debug.h"
#include "common/config.h"
#include "msg/Message.h"
#include "include/assert.h"
#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()
{
arrived.clear();
duration.clear();
shutdown = true;
}
void OpHistory::insert(utime_t now, TrackedOpRef op)
{
if (shutdown)
return;
duration.insert(make_pair(op->get_duration(), op));
arrived.insert(make_pair(op->get_arrived(), op));
cleanup(now);
}
void OpHistory::cleanup(utime_t now)
{
while (arrived.size() &&
(now - arrived.begin()->first >
(double)(tracker->cct->_conf->op_tracker_history_duration))) {
duration.erase(make_pair(
arrived.begin()->second->get_duration(),
arrived.begin()->second));
arrived.erase(arrived.begin());
}
while (duration.size() > tracker->cct->_conf->op_tracker_history_size) {
arrived.erase(make_pair(
duration.begin()->second->get_arrived(),
duration.begin()->second));
duration.erase(duration.begin());
}
}
void OpHistory::dump_ops(utime_t now, Formatter *f)
{
cleanup(now);
f->open_object_section("OpHistory");
f->dump_int("num to keep", tracker->cct->_conf->op_tracker_history_size);
f->dump_int("duration to keep", tracker->cct->_conf->op_tracker_history_duration);
{
f->open_array_section("Ops");
for (set<pair<utime_t, TrackedOpRef> >::const_iterator i =
arrived.begin();
i != arrived.end();
++i) {
f->open_object_section("Op");
i->second->dump(now, f);
f->close_section();
}
f->close_section();
}
f->close_section();
}
void OpTracker::dump_historic_ops(Formatter *f)
{
Mutex::Locker locker(ops_in_flight_lock);
utime_t now = ceph_clock_now(cct);
history.dump_ops(now, f);
}
void OpTracker::dump_ops_in_flight(Formatter *f)
{
Mutex::Locker locker(ops_in_flight_lock);
f->open_object_section("ops_in_flight"); // overall dump
f->dump_int("num_ops", ops_in_flight.size());
f->open_array_section("ops"); // list of TrackedOps
utime_t now = ceph_clock_now(cct);
for (xlist<TrackedOp*>::iterator p = ops_in_flight.begin(); !p.end(); ++p) {
f->open_object_section("op");
(*p)->dump(now, f);
f->close_section(); // this TrackedOp
}
f->close_section(); // list of TrackedOps
f->close_section(); // overall dump
}
void OpTracker::register_inflight_op(xlist<TrackedOp*>::item *i)
{
Mutex::Locker locker(ops_in_flight_lock);
ops_in_flight.push_back(i);
ops_in_flight.back()->seq = seq++;
}
void OpTracker::unregister_inflight_op(TrackedOp *i)
{
Mutex::Locker locker(ops_in_flight_lock);
assert(i->xitem.get_list() == &ops_in_flight);
utime_t now = ceph_clock_now(cct);
i->xitem.remove_myself();
i->request->clear_data();
history.insert(now, TrackedOpRef(i));
}
bool OpTracker::check_ops_in_flight(std::vector<string> &warning_vector)
{
Mutex::Locker locker(ops_in_flight_lock);
if (!ops_in_flight.size())
return false;
utime_t now = ceph_clock_now(cct);
utime_t too_old = now;
too_old -= cct->_conf->op_tracker_complaint_time;
utime_t oldest_secs = now - ops_in_flight.front()->get_arrived();
dout(10) << "ops_in_flight.size: " << ops_in_flight.size()
<< "; oldest is " << oldest_secs
<< " seconds old" << dendl;
if (oldest_secs < cct->_conf->op_tracker_complaint_time)
return false;
xlist<TrackedOp*>::iterator i = ops_in_flight.begin();
warning_vector.reserve(cct->_conf->op_tracker_log_threshold + 1);
int slow = 0; // total slow
int warned = 0; // total logged
while (!i.end() && (*i)->get_arrived() < too_old) {
slow++;
// exponential backoff of warning intervals
if (((*i)->get_arrived() +
(cct->_conf->op_tracker_complaint_time *
(*i)->warn_interval_multiplier)) < now) {
// will warn
if (warning_vector.empty())
warning_vector.push_back("");
warned++;
if (warned > cct->_conf->op_tracker_log_threshold)
break;
utime_t age = now - (*i)->get_arrived();
stringstream ss;
ss << "slow request " << age << " seconds old, received at " << (*i)->get_arrived()
<< ": " << *((*i)->request) << " currently "
<< ((*i)->current.size() ? (*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 warning_vector.size();
}
void OpTracker::get_age_ms_histogram(pow2_hist_t *h)
{
Mutex::Locker locker(ops_in_flight_lock);
h->clear();
utime_t now = ceph_clock_now(NULL);
unsigned bin = 30;
uint32_t lb = 1 << (bin-1); // lower bound for this bin
int count = 0;
for (xlist<TrackedOp*>::iterator i = ops_in_flight.begin(); !i.end(); ++i) {
utime_t age = now - (*i)->get_arrived();
uint32_t ms = (long)(age * 1000.0);
if (ms >= lb) {
count++;
continue;
}
if (count)
h->set(bin, count);
while (lb > ms) {
bin--;
lb >>= 1;
}
count = 1;
}
if (count)
h->set(bin, count);
}
void OpTracker::mark_event(TrackedOp *op, const string &dest)
{
utime_t now = ceph_clock_now(cct);
return _mark_event(op, dest, now);
}
void OpTracker::_mark_event(TrackedOp *op, const string &evt,
utime_t time)
{
Mutex::Locker locker(ops_in_flight_lock);
dout(5) << //"reqid: " << op->get_reqid() <<
", seq: " << op->seq
<< ", time: " << time << ", event: " << evt
<< ", request: " << *op->request << dendl;
}
void OpTracker::RemoveOnDelete::operator()(TrackedOp *op) {
op->mark_event("done");
tracker->unregister_inflight_op(op);
// Do not delete op, unregister_inflight_op took control
}
void TrackedOp::mark_event(const string &event)
{
utime_t now = ceph_clock_now(g_ceph_context);
{
Mutex::Locker l(lock);
events.push_back(make_pair(now, event));
}
tracker->mark_event(this, event);
}
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