1 // -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
2 // vim: ts=8 sw=2 smarttab
9 #include <boost/scoped_ptr.hpp>
11 #include "common/ceph_argparse.h"
12 #include "common/common_init.h"
13 #include "common/config.h"
14 #include "common/Mutex.h"
15 #include "common/snap_types.h"
16 #include "global/global_init.h"
17 #include "include/buffer.h"
18 #include "include/Context.h"
19 #include "include/stringify.h"
20 #include "osdc/ObjectCacher.h"
22 #include "FakeWriteback.h"
23 #include "MemWriteback.h"
27 // XXX: Only tests default namespace
29 op_data(std::string oid, uint64_t offset, uint64_t len, bool read)
30 : extent(oid, 0, offset, len, 0), is_read(read)
33 extent.buffer_extents.push_back(make_pair(0, len));
38 ceph::bufferlist result;
39 std::atomic<unsigned> done = { 0 };
42 class C_Count : public Context {
44 std::atomic<unsigned> *m_outstanding = nullptr;
46 C_Count(op_data *op, std::atomic<unsigned> *outstanding)
47 : m_op(op), m_outstanding(outstanding) {}
48 void finish(int r) override {
50 assert(*m_outstanding > 0);
55 int stress_test(uint64_t num_ops, uint64_t num_objs,
56 uint64_t max_obj_size, uint64_t delay_ns,
57 uint64_t max_op_len, float percent_reads)
59 Mutex lock("object_cacher_stress::object_cacher");
60 FakeWriteback writeback(g_ceph_context, &lock, delay_ns);
62 ObjectCacher obc(g_ceph_context, "test", writeback, lock, NULL, NULL,
63 g_conf->client_oc_size,
64 g_conf->client_oc_max_objects,
65 g_conf->client_oc_max_dirty,
66 g_conf->client_oc_target_dirty,
67 g_conf->client_oc_max_dirty_age,
71 std::atomic<unsigned> outstanding_reads = { 0 };
72 vector<ceph::shared_ptr<op_data> > ops;
73 ObjectCacher::ObjectSet object_set(NULL, 0, 0);
75 ceph::buffer::ptr bp(max_op_len);
77 uint64_t journal_tid = 0;
82 std::cout << "Test configuration:\n\n"
83 << setw(10) << "ops: " << num_ops << "\n"
84 << setw(10) << "objects: " << num_objs << "\n"
85 << setw(10) << "obj size: " << max_obj_size << "\n"
86 << setw(10) << "delay: " << delay_ns << "\n"
87 << setw(10) << "max op len: " << max_op_len << "\n"
88 << setw(10) << "percent reads: " << percent_reads << "\n\n";
90 for (uint64_t i = 0; i < num_ops; ++i) {
91 uint64_t offset = random() % max_obj_size;
92 uint64_t max_len = MIN(max_obj_size - offset, max_op_len);
93 // no zero-length operations
94 uint64_t length = random() % (MAX(max_len - 1, 1)) + 1;
95 std::string oid = "test" + stringify(random() % num_objs);
96 bool is_read = random() < percent_reads * RAND_MAX;
97 ceph::shared_ptr<op_data> op(new op_data(oid, offset, length, is_read));
99 std::cout << "op " << i << " " << (is_read ? "read" : "write")
100 << " " << op->extent << "\n";
102 ObjectCacher::OSDRead *rd = obc.prepare_read(CEPH_NOSNAP, &op->result, 0);
103 rd->extents.push_back(op->extent);
105 Context *completion = new C_Count(op.get(), &outstanding_reads);
107 int r = obc.readx(rd, &object_set, completion);
110 if ((uint64_t)r == length)
111 completion->complete(r);
115 ObjectCacher::OSDWrite *wr = obc.prepare_write(snapc, bl,
116 ceph::real_time::min(), 0,
118 wr->extents.push_back(op->extent);
120 obc.writex(wr, &object_set, NULL);
125 // check that all reads completed
126 for (uint64_t i = 0; i < num_ops; ++i) {
127 if (!ops[i]->is_read)
129 std::cout << "waiting for read " << i << ops[i]->extent << std::endl;
138 std::cout << "completion called more than once!\n" << std::endl;
144 obc.release_set(&object_set);
148 Mutex mylock("librbd::ImageCtx::flush_cache");
151 Context *onfinish = new C_SafeCond(&mylock, &cond, &done, &r);
153 bool already_flushed = obc.flush_set(&object_set, onfinish);
154 std::cout << "already flushed = " << already_flushed << std::endl;
163 bool unclean = obc.release_set(&object_set);
167 std::cout << "unclean buffers left over!" << std::endl;
173 std::cout << "Test completed successfully." << std::endl;
178 int correctness_test(uint64_t delay_ns)
180 std::cerr << "starting correctness test" << std::endl;
181 Mutex lock("object_cacher_stress::object_cacher");
182 MemWriteback writeback(g_ceph_context, &lock, delay_ns);
184 ObjectCacher obc(g_ceph_context, "test", writeback, lock, NULL, NULL,
185 1<<21, // max cache size, 2MB
186 1, // max objects, just one
187 1<<18, // max dirty, 256KB
188 1<<17, // target dirty, 128KB
189 g_conf->client_oc_max_dirty_age,
192 std::cerr << "just start()ed ObjectCacher" << std::endl;
195 ceph_tid_t journal_tid = 0;
196 std::string oid("correctness_test_obj");
197 ObjectCacher::ObjectSet object_set(NULL, 0, 0);
198 ceph::bufferlist zeroes_bl;
199 zeroes_bl.append_zero(1<<20);
201 // set up a 4MB all-zero object
202 std::cerr << "writing 4x1MB object" << std::endl;
203 std::map<int, C_SaferCond> create_finishers;
204 for (int i = 0; i < 4; ++i) {
205 ObjectCacher::OSDWrite *wr = obc.prepare_write(snapc, zeroes_bl,
206 ceph::real_time::min(), 0,
208 ObjectExtent extent(oid, 0, zeroes_bl.length()*i, zeroes_bl.length(), 0);
209 extent.oloc.pool = 0;
210 extent.buffer_extents.push_back(make_pair(0, 1<<20));
211 wr->extents.push_back(extent);
213 obc.writex(wr, &object_set, &create_finishers[i]);
217 // write some 1-valued bits at 256-KB intervals for checking consistency
218 std::cerr << "Writing some 0xff values" << std::endl;
219 ceph::buffer::ptr ones(1<<16);
220 memset(ones.c_str(), 0xff, ones.length());
221 ceph::bufferlist ones_bl;
222 ones_bl.append(ones);
223 for (int i = 1<<18; i < 1<<22; i+=1<<18) {
224 ObjectCacher::OSDWrite *wr = obc.prepare_write(snapc, ones_bl,
225 ceph::real_time::min(), 0,
227 ObjectExtent extent(oid, 0, i, ones_bl.length(), 0);
228 extent.oloc.pool = 0;
229 extent.buffer_extents.push_back(make_pair(0, 1<<16));
230 wr->extents.push_back(extent);
232 obc.writex(wr, &object_set, &create_finishers[i]);
236 for (auto i = create_finishers.begin(); i != create_finishers.end(); ++i) {
239 std::cout << "Finished setting up object" << std::endl;
241 C_SaferCond flushcond;
242 bool done = obc.flush_all(&flushcond);
244 std::cout << "Waiting for flush" << std::endl;
251 /* now read the back half of the object in, check consistency,
253 std::cout << "Reading back half of object (1<<21~1<<21)" << std::endl;
255 C_SaferCond backreadcond;
256 ObjectCacher::OSDRead *back_half_rd = obc.prepare_read(CEPH_NOSNAP, &readbl, 0);
257 ObjectExtent back_half_extent(oid, 0, 1<<21, 1<<21, 0);
258 back_half_extent.oloc.pool = 0;
259 back_half_extent.buffer_extents.push_back(make_pair(0, 1<<21));
260 back_half_rd->extents.push_back(back_half_extent);
262 int r = obc.readx(back_half_rd, &object_set, &backreadcond);
266 std::cout << "Waiting to read data into cache" << std::endl;
267 r = backreadcond.wait();
272 /* Read the whole object in,
273 * verify we have to wait for it to complete,
274 * overwrite a small piece, (http://tracker.ceph.com/issues/16002),
275 * and check consistency */
278 std::cout<< "Reading whole object (0~1<<22)" << std::endl;
279 C_SaferCond frontreadcond;
280 ObjectCacher::OSDRead *whole_rd = obc.prepare_read(CEPH_NOSNAP, &readbl, 0);
281 ObjectExtent whole_extent(oid, 0, 0, 1<<22, 0);
282 whole_extent.oloc.pool = 0;
283 whole_extent.buffer_extents.push_back(make_pair(0, 1<<22));
284 whole_rd->extents.push_back(whole_extent);
286 r = obc.readx(whole_rd, &object_set, &frontreadcond);
287 // we cleared out the cache by reading back half, it shouldn't pass immediately!
289 std::cout << "Data (correctly) not available without fetching" << std::endl;
291 ObjectCacher::OSDWrite *verify_wr = obc.prepare_write(snapc, ones_bl,
292 ceph::real_time::min(), 0,
294 ObjectExtent verify_extent(oid, 0, (1<<18)+(1<<16), ones_bl.length(), 0);
295 verify_extent.oloc.pool = 0;
296 verify_extent.buffer_extents.push_back(make_pair(0, 1<<16));
297 verify_wr->extents.push_back(verify_extent);
298 C_SaferCond verify_finisher;
299 obc.writex(verify_wr, &object_set, &verify_finisher);
301 std::cout << "wrote dirtying data" << std::endl;
303 std::cout << "Waiting to read data into cache" << std::endl;
304 frontreadcond.wait();
305 verify_finisher.wait();
307 std::cout << "Validating data" << std::endl;
309 for (int i = 1<<18; i < 1<<22; i+=1<<18) {
310 bufferlist ones_maybe;
311 ones_maybe.substr_of(readbl, i, ones_bl.length());
312 assert(0 == memcmp(ones_maybe.c_str(), ones_bl.c_str(), ones_bl.length()));
314 bufferlist ones_maybe;
315 ones_maybe.substr_of(readbl, (1<<18)+(1<<16), ones_bl.length());
316 assert(0 == memcmp(ones_maybe.c_str(), ones_bl.c_str(), ones_bl.length()));
318 std::cout << "validated that data is 0xff where it should be" << std::endl;
321 C_SaferCond flushcond2;
322 done = obc.flush_all(&flushcond2);
324 std::cout << "Waiting for final write flush" << std::endl;
330 bool unclean = obc.release_set(&object_set);
332 std::cout << "unclean buffers left over!" << std::endl;
333 vector<ObjectExtent> discard_extents;
335 for (auto oi = object_set.objects.begin(); !oi.end(); ++oi) {
336 discard_extents.emplace_back(oid, i++, 0, 1<<22, 0);
338 obc.discard_set(&object_set, discard_extents);
347 std::cout << "Testing ObjectCacher correctness complete" << std::endl;
354 int main(int argc, const char **argv)
356 std::vector<const char*> args;
357 argv_to_vec(argc, argv, args);
359 auto cct = global_init(NULL, args, CEPH_ENTITY_TYPE_CLIENT,
360 CODE_ENVIRONMENT_UTILITY, 0);
362 long long delay_ns = 0;
363 long long num_ops = 1000;
364 long long obj_bytes = 4 << 20;
365 long long max_len = 128 << 10;
366 long long num_objs = 10;
367 float percent_reads = 0.90;
368 int seed = time(0) % 100000;
370 bool correctness = false;
371 std::ostringstream err;
372 std::vector<const char*>::iterator i;
373 for (i = args.begin(); i != args.end();) {
374 if (ceph_argparse_witharg(args, i, &delay_ns, err, "--delay-ns", (char*)NULL)) {
375 if (!err.str().empty()) {
376 cerr << argv[0] << ": " << err.str() << std::endl;
379 } else if (ceph_argparse_witharg(args, i, &num_ops, err, "--ops", (char*)NULL)) {
380 if (!err.str().empty()) {
381 cerr << argv[0] << ": " << err.str() << std::endl;
384 } else if (ceph_argparse_witharg(args, i, &num_objs, err, "--objects", (char*)NULL)) {
385 if (!err.str().empty()) {
386 cerr << argv[0] << ": " << err.str() << std::endl;
389 } else if (ceph_argparse_witharg(args, i, &obj_bytes, err, "--obj-size", (char*)NULL)) {
390 if (!err.str().empty()) {
391 cerr << argv[0] << ": " << err.str() << std::endl;
394 } else if (ceph_argparse_witharg(args, i, &max_len, err, "--max-op-size", (char*)NULL)) {
395 if (!err.str().empty()) {
396 cerr << argv[0] << ": " << err.str() << std::endl;
399 } else if (ceph_argparse_witharg(args, i, &percent_reads, err, "--percent-read", (char*)NULL)) {
400 if (!err.str().empty()) {
401 cerr << argv[0] << ": " << err.str() << std::endl;
404 } else if (ceph_argparse_witharg(args, i, &seed, err, "--seed", (char*)NULL)) {
405 if (!err.str().empty()) {
406 cerr << argv[0] << ": " << err.str() << std::endl;
409 } else if (ceph_argparse_flag(args, i, "--stress-test", NULL)) {
411 } else if (ceph_argparse_flag(args, i, "--correctness-test", NULL)) {
414 cerr << "unknown option " << *i << std::endl;
421 return stress_test(num_ops, num_objs, obj_bytes, delay_ns, max_len, percent_reads);
424 return correctness_test(delay_ns);