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// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
// vim: ts=8 sw=2 smarttab
#include <cstdlib>
#include <ctime>
#include <sstream>
#include <string>
#include <vector>
#include <boost/scoped_ptr.hpp>
#include "include/atomic.h"
#include "include/buffer.h"
#include "include/Context.h"
#include "include/stringify.h"
#include "common/ceph_argparse.h"
#include "common/common_init.h"
#include "common/config.h"
#include "common/Mutex.h"
#include "common/snap_types.h"
#include "osdc/ObjectCacher.h"
#include "global/global_context.h"
#include "global/global_init.h"
#include "FakeWriteback.h"
struct op_data {
op_data(std::string oid, uint64_t offset, uint64_t len, bool read)
: extent(oid, 0, offset, len), is_read(read)
{
extent.oloc.pool = 0;
extent.buffer_extents.push_back(make_pair(0, len));
}
ObjectExtent extent;
bool is_read;
ceph::bufferlist result;
atomic_t done;
};
class C_Count : public Context {
op_data *m_op;
atomic_t *m_outstanding;
public:
C_Count(op_data *op, atomic_t *outstanding)
: m_op(op), m_outstanding(outstanding) {}
void finish(int r) {
m_op->done.inc();
assert(m_outstanding->read() > 0);
m_outstanding->dec();
}
};
int stress_test(uint64_t num_ops, uint64_t num_objs,
uint64_t max_obj_size, uint64_t delay_ns,
uint64_t max_op_len, float percent_reads)
{
Mutex lock("object_cacher_stress::object_cacher");
FakeWriteback writeback(g_ceph_context, &lock, delay_ns);
ObjectCacher obc(g_ceph_context, "test", writeback, lock, NULL, NULL,
g_conf->client_oc_size,
g_conf->client_oc_max_objects,
g_conf->client_oc_max_dirty,
g_conf->client_oc_target_dirty,
g_conf->client_oc_max_dirty_age);
obc.start();
atomic_t outstanding_reads;
vector<std::tr1::shared_ptr<op_data> > ops;
ObjectCacher::ObjectSet object_set(NULL, 0, 0);
SnapContext snapc;
ceph::buffer::ptr bp(max_op_len);
ceph::bufferlist bl;
bp.zero();
bl.append(bp);
// schedule ops
std::cout << "Test configuration:\n\n"
<< setw(10) << "ops: " << num_ops << "\n"
<< setw(10) << "objects: " << num_objs << "\n"
<< setw(10) << "obj size: " << max_obj_size << "\n"
<< setw(10) << "delay: " << delay_ns << "\n"
<< setw(10) << "max op len: " << max_op_len << "\n"
<< setw(10) << "percent reads: " << percent_reads << "\n\n";
for (uint64_t i = 0; i < num_ops; ++i) {
uint64_t offset = random() % max_obj_size;
uint64_t max_len = MIN(max_obj_size - offset, max_op_len);
// no zero-length operations
uint64_t length = random() % (MAX(max_len - 1, 1)) + 1;
std::string oid = "test" + stringify(random() % num_objs);
bool is_read = random() < percent_reads * RAND_MAX;
std::tr1::shared_ptr<op_data> op(new op_data(oid, offset, length, is_read));
ops.push_back(op);
std::cout << "op " << i << " " << (is_read ? "read" : "write")
<< " " << op->extent << "\n";
if (op->is_read) {
ObjectCacher::OSDRead *rd = obc.prepare_read(CEPH_NOSNAP, &op->result, 0);
rd->extents.push_back(op->extent);
outstanding_reads.inc();
Context *completion = new C_Count(op.get(), &outstanding_reads);
lock.Lock();
int r = obc.readx(rd, &object_set, completion);
lock.Unlock();
assert(r >= 0);
if ((uint64_t)r == length)
completion->complete(r);
else
assert(r == 0);
} else {
ObjectCacher::OSDWrite *wr = obc.prepare_write(snapc, bl, utime_t(), 0);
wr->extents.push_back(op->extent);
lock.Lock();
obc.writex(wr, &object_set, lock);
lock.Unlock();
}
}
// check that all reads completed
for (uint64_t i = 0; i < num_ops; ++i) {
if (!ops[i]->is_read)
continue;
std::cout << "waiting for read " << i << ops[i]->extent << std::endl;
uint64_t done = 0;
while (done == 0) {
done = ops[i]->done.read();
if (!done) {
usleep(500);
}
}
if (done > 1) {
std::cout << "completion called more than once!\n" << std::endl;
return EXIT_FAILURE;
}
}
lock.Lock();
obc.release_set(&object_set);
lock.Unlock();
int r = 0;
Mutex mylock("librbd::ImageCtx::flush_cache");
Cond cond;
bool done;
Context *onfinish = new C_SafeCond(&mylock, &cond, &done, &r);
lock.Lock();
bool already_flushed = obc.commit_set(&object_set, onfinish);
std::cout << "already flushed = " << already_flushed << std::endl;
lock.Unlock();
if (!already_flushed) {
mylock.Lock();
while (!done) {
cond.Wait(mylock);
}
mylock.Unlock();
}
lock.Lock();
bool unclean = obc.release_set(&object_set);
lock.Unlock();
if (unclean) {
std::cout << "unclean buffers left over!" << std::endl;
return EXIT_FAILURE;
}
obc.stop();
std::cout << "Test completed successfully." << std::endl;
return EXIT_SUCCESS;
}
int main(int argc, const char **argv)
{
std::vector<const char*> args;
argv_to_vec(argc, argv, args);
env_to_vec(args);
global_init(NULL, args, CEPH_ENTITY_TYPE_CLIENT, CODE_ENVIRONMENT_UTILITY, 0);
long long delay_ns = 0;
long long num_ops = 1000;
long long obj_bytes = 4 << 20;
long long max_len = 128 << 10;
long long num_objs = 10;
float percent_reads = 0.90;
int seed = time(0) % 100000;
std::ostringstream err;
std::vector<const char*>::iterator i;
for (i = args.begin(); i != args.end();) {
if (ceph_argparse_withlonglong(args, i, &delay_ns, &err, "--delay-ns", (char*)NULL)) {
if (!err.str().empty()) {
cerr << argv[0] << ": " << err.str() << std::endl;
return EXIT_FAILURE;
}
} else if (ceph_argparse_withlonglong(args, i, &num_ops, &err, "--ops", (char*)NULL)) {
if (!err.str().empty()) {
cerr << argv[0] << ": " << err.str() << std::endl;
return EXIT_FAILURE;
}
} else if (ceph_argparse_withlonglong(args, i, &num_objs, &err, "--objects", (char*)NULL)) {
if (!err.str().empty()) {
cerr << argv[0] << ": " << err.str() << std::endl;
return EXIT_FAILURE;
}
} else if (ceph_argparse_withlonglong(args, i, &obj_bytes, &err, "--obj-size", (char*)NULL)) {
if (!err.str().empty()) {
cerr << argv[0] << ": " << err.str() << std::endl;
return EXIT_FAILURE;
}
} else if (ceph_argparse_withlonglong(args, i, &max_len, &err, "--max-op-size", (char*)NULL)) {
if (!err.str().empty()) {
cerr << argv[0] << ": " << err.str() << std::endl;
return EXIT_FAILURE;
}
} else if (ceph_argparse_withfloat(args, i, &percent_reads, &err, "--percent-read", (char*)NULL)) {
if (!err.str().empty()) {
cerr << argv[0] << ": " << err.str() << std::endl;
return EXIT_FAILURE;
}
} else if (ceph_argparse_withint(args, i, &seed, &err, "--seed", (char*)NULL)) {
if (!err.str().empty()) {
cerr << argv[0] << ": " << err.str() << std::endl;
return EXIT_FAILURE;
}
} else {
cerr << "unknown option " << *i << std::endl;
return EXIT_FAILURE;
}
}
srandom(seed);
return stress_test(num_ops, num_objs, obj_bytes, delay_ns, max_len, percent_reads);
}
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