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// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
#include "OpRequest.h"
#include "common/Formatter.h"
#include <iostream>
#include <vector>
#include "common/debug.h"
#include "common/config.h"
#include "msg/Message.h"
#include "messages/MOSDOp.h"
#include "messages/MOSDSubOp.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 << "--OSD::tracker-- ";
}
void OpHistory::on_shutdown()
{
arrived.clear();
duration.clear();
shutdown = true;
}
void OpHistory::insert(utime_t now, OpRequestRef 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)(g_conf->osd_op_history_duration))) {
duration.erase(make_pair(
arrived.begin()->second->get_duration(),
arrived.begin()->second));
arrived.erase(arrived.begin());
}
while (duration.size() > g_conf->osd_op_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", g_conf->osd_op_history_size);
f->dump_int("duration to keep", g_conf->osd_op_history_duration);
{
f->open_array_section("Ops");
for (set<pair<utime_t, OpRequestRef> >::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(ostream &ss)
{
JSONFormatter jf(true);
Mutex::Locker locker(ops_in_flight_lock);
utime_t now = ceph_clock_now(g_ceph_context);
history.dump_ops(now, &jf);
jf.flush(ss);
}
void OpTracker::dump_ops_in_flight(ostream &ss)
{
JSONFormatter jf(true);
Mutex::Locker locker(ops_in_flight_lock);
jf.open_object_section("ops_in_flight"); // overall dump
jf.dump_int("num_ops", ops_in_flight.size());
jf.open_array_section("ops"); // list of OpRequests
utime_t now = ceph_clock_now(g_ceph_context);
for (xlist<OpRequest*>::iterator p = ops_in_flight.begin(); !p.end(); ++p) {
jf.open_object_section("op");
(*p)->dump(now, &jf);
jf.close_section(); // this OpRequest
}
jf.close_section(); // list of OpRequests
jf.close_section(); // overall dump
jf.flush(ss);
}
void OpTracker::register_inflight_op(xlist<OpRequest*>::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(OpRequest *i)
{
Mutex::Locker locker(ops_in_flight_lock);
assert(i->xitem.get_list() == &ops_in_flight);
utime_t now = ceph_clock_now(g_ceph_context);
i->xitem.remove_myself();
i->request->clear_data();
history.insert(now, OpRequestRef(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(g_ceph_context);
utime_t too_old = now;
too_old -= g_conf->osd_op_complaint_time;
utime_t oldest_secs = now - ops_in_flight.front()->received_time;
dout(10) << "ops_in_flight.size: " << ops_in_flight.size()
<< "; oldest is " << oldest_secs
<< " seconds old" << dendl;
if (oldest_secs < g_conf->osd_op_complaint_time)
return false;
xlist<OpRequest*>::iterator i = ops_in_flight.begin();
warning_vector.reserve(g_conf->osd_op_log_threshold + 1);
int slow = 0; // total slow
int warned = 0; // total logged
while (!i.end() && (*i)->received_time < too_old) {
slow++;
// exponential backoff of warning intervals
if (((*i)->received_time +
(g_conf->osd_op_complaint_time *
(*i)->warn_interval_multiplier)) < now) {
// will warn
if (warning_vector.empty())
warning_vector.push_back("");
warned++;
if (warned > g_conf->osd_op_log_threshold)
break;
utime_t age = now - (*i)->received_time;
stringstream ss;
ss << "slow request " << age << " seconds old, received at " << (*i)->received_time
<< ": " << *((*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 OpRequest::dump(utime_t now, Formatter *f) const
{
Message *m = request;
stringstream name;
m->print(name);
f->dump_string("description", name.str().c_str()); // this OpRequest
f->dump_unsigned("rmw_flags", rmw_flags);
f->dump_stream("received_at") << received_time;
f->dump_float("age", now - received_time);
f->dump_float("duration", get_duration());
f->dump_string("flag_point", state_string());
if (m->get_orig_source().is_client()) {
f->open_object_section("client_info");
stringstream client_name;
client_name << m->get_orig_source();
f->dump_string("client", client_name.str());
f->dump_int("tid", m->get_tid());
f->close_section(); // client_info
}
{
f->open_array_section("events");
for (list<pair<utime_t, string> >::const_iterator i = events.begin();
i != events.end();
++i) {
f->open_object_section("event");
f->dump_stream("time") << i->first;
f->dump_string("event", i->second);
f->close_section();
}
f->close_section();
}
}
void OpTracker::mark_event(OpRequest *op, const string &dest)
{
utime_t now = ceph_clock_now(g_ceph_context);
return _mark_event(op, dest, now);
}
void OpTracker::_mark_event(OpRequest *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()(OpRequest *op) {
op->mark_event("done");
tracker->unregister_inflight_op(op);
// Do not delete op, unregister_inflight_op took control
}
OpRequestRef OpTracker::create_request(Message *ref)
{
OpRequestRef retval(new OpRequest(ref, this),
RemoveOnDelete(this));
if (ref->get_type() == CEPH_MSG_OSD_OP) {
retval->reqid = static_cast<MOSDOp*>(ref)->get_reqid();
} else if (ref->get_type() == MSG_OSD_SUBOP) {
retval->reqid = static_cast<MOSDSubOp*>(ref)->reqid;
}
_mark_event(retval.get(), "header_read", ref->get_recv_stamp());
_mark_event(retval.get(), "throttled", ref->get_throttle_stamp());
_mark_event(retval.get(), "all_read", ref->get_recv_complete_stamp());
_mark_event(retval.get(), "dispatched", ref->get_dispatch_stamp());
return retval;
}
void OpRequest::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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