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mtd.cc
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/* Masstree
* Eddie Kohler, Yandong Mao, Robert Morris
* Copyright (c) 2012-2014 President and Fellows of Harvard College
* Copyright (c) 2012-2014 Massachusetts Institute of Technology
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, subject to the conditions
* listed in the Masstree LICENSE file. These conditions include: you must
* preserve this copyright notice, and you cannot mention the copyright
* holders in advertising related to the Software without their permission.
* The Software is provided WITHOUT ANY WARRANTY, EXPRESS OR IMPLIED. This
* notice is a summary of the Masstree LICENSE file; the license in that file
* is legally binding.
*/
// -*- mode: c++ -*-
// mtd: key/value server
//
#include <stdio.h>
#include <stdarg.h>
#include <ctype.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <netinet/tcp.h>
#include <sys/select.h>
#include <sys/mman.h>
#include <sys/stat.h>
#include <limits.h>
#if HAVE_SYS_EPOLL_H
#include <sys/epoll.h>
#endif
#if __linux__
#include <asm-generic/mman.h>
#endif
#include <fcntl.h>
#include <assert.h>
#include <string.h>
#include <pthread.h>
#include <math.h>
#include <signal.h>
#include <errno.h>
#ifdef __linux__
#include <malloc.h>
#endif
#include "nodeversion.hh"
#include "kvstats.hh"
#include "json.hh"
#include "kvtest.hh"
#include "kvrandom.hh"
#include "clp.h"
#include "log.hh"
#include "checkpoint.hh"
#include "file.hh"
#include "kvproto.hh"
#include "query_masstree.hh"
#include "masstree_tcursor.hh"
#include "masstree_insert.hh"
#include "masstree_remove.hh"
#include "masstree_scan.hh"
#include "msgpack.hh"
#include <algorithm>
#include <deque>
using lcdf::StringAccum;
enum { CKState_Quit, CKState_Uninit, CKState_Ready, CKState_Go };
volatile bool timeout[2] = {false, false};
double duration[2] = {10, 0};
Masstree::default_table *tree;
// all default to the number of cores
static int udpthreads = 0;
static int tcpthreads = 0;
static int nckthreads = 0;
static int testthreads = 0;
static int nlogger = 0;
static std::vector<int> cores;
static bool logging = true;
static bool pinthreads = false;
static bool recovery_only = false;
volatile uint64_t globalepoch = 1; // global epoch, updated by main thread regularly
volatile uint64_t active_epoch = 1;
static int port = 2117;
static uint64_t test_limit = ~uint64_t(0);
static int doprint = 0;
int kvtest_first_seed = 31949;
static volatile sig_atomic_t go_quit = 0;
static int quit_pipe[2];
static std::vector<const char*> logdirs;
static std::vector<const char*> ckpdirs;
static logset* logs;
volatile bool recovering = false; // so don't add log entries, and free old value immediately
static double checkpoint_interval = 1000000;
static kvepoch_t ckp_gen = 0; // recover from checkpoint
static ckstate *cks = NULL; // checkpoint status of all checkpointing threads
static pthread_cond_t rec_cond;
pthread_mutex_t rec_mu;
static int rec_nactive;
static int rec_state = REC_NONE;
kvtimestamp_t initial_timestamp;
static pthread_cond_t checkpoint_cond;
static pthread_mutex_t checkpoint_mu;
static void prepare_thread(threadinfo *ti);
static int* tcp_thread_pipes;
static void* tcp_threadfunc(void* ti);
static void* udp_threadfunc(void* ti);
static void log_init();
static void recover(threadinfo*);
static kvepoch_t read_checkpoint(threadinfo*, const char *path);
static void* conc_checkpointer(void* ti);
static void recovercheckpoint(threadinfo* ti);
static void *canceling(void *);
static void catchint(int);
static void epochinc(int);
/* running local tests */
void test_timeout(int) {
size_t n;
for (n = 0; n < arraysize(timeout) && timeout[n]; ++n)
/* do nothing */;
if (n < arraysize(timeout)) {
timeout[n] = true;
if (n + 1 < arraysize(timeout) && duration[n + 1])
xalarm(duration[n + 1]);
}
}
struct kvtest_client {
kvtest_client()
: checks_(0), kvo_() {
}
kvtest_client(const char *testname)
: testname_(testname), checks_(0), kvo_() {
}
int id() const {
return ti_->index();
}
int nthreads() const {
return testthreads;
}
void set_thread(threadinfo *ti) {
ti_ = ti;
}
void register_timeouts(int n) {
always_assert(n <= (int) arraysize(::timeout));
for (int i = 1; i < n; ++i)
if (duration[i] == 0)
duration[i] = 0;//duration[i - 1];
}
bool timeout(int which) const {
return ::timeout[which];
}
uint64_t limit() const {
return test_limit;
}
Json param(const String&) const {
return Json();
}
double now() const {
return ::now();
}
void get(long ikey, Str *value);
void get(const Str &key);
void get(long ikey) {
quick_istr key(ikey);
get(key.string());
}
void get_check(const Str &key, const Str &expected);
void get_check(const char *key, const char *expected) {
get_check(Str(key, strlen(key)), Str(expected, strlen(expected)));
}
void get_check(long ikey, long iexpected) {
quick_istr key(ikey), expected(iexpected);
get_check(key.string(), expected.string());
}
void get_check_key8(long ikey, long iexpected) {
quick_istr key(ikey, 8), expected(iexpected);
get_check(key.string(), expected.string());
}
void get_check_key10(long ikey, long iexpected) {
quick_istr key(ikey, 10), expected(iexpected);
get_check(key.string(), expected.string());
}
void get_col_check(const Str &key, int col, const Str &expected);
void get_col_check_key10(long ikey, int col, long iexpected) {
quick_istr key(ikey, 10), expected(iexpected);
get_col_check(key.string(), col, expected.string());
}
bool get_sync(long ikey);
void put(const Str &key, const Str &value);
void put(const char *key, const char *val) {
put(Str(key, strlen(key)), Str(val, strlen(val)));
}
void put(long ikey, long ivalue) {
quick_istr key(ikey), value(ivalue);
put(key.string(), value.string());
}
void put_key8(long ikey, long ivalue) {
quick_istr key(ikey, 8), value(ivalue);
put(key.string(), value.string());
}
void put_key10(long ikey, long ivalue) {
quick_istr key(ikey, 10), value(ivalue);
put(key.string(), value.string());
}
void put_col(const Str &key, int col, const Str &value);
void put_col_key10(long ikey, int col, long ivalue) {
quick_istr key(ikey, 10), value(ivalue);
put_col(key.string(), col, value.string());
}
bool remove_sync(long ikey);
void puts_done() {
}
void wait_all() {
}
void rcu_quiesce() {
}
String make_message(StringAccum &sa) const;
void notice(const char *fmt, ...);
void fail(const char *fmt, ...);
const Json& report(const Json& x) {
return report_.merge(x);
}
void finish() {
fprintf(stderr, "%d: %s\n", ti_->index(), report_.unparse().c_str());
}
threadinfo *ti_;
query<row_type> q_[10];
const char *testname_;
kvrandom_lcg_nr rand;
int checks_;
Json report_;
struct kvout *kvo_;
static volatile int failing;
};
volatile int kvtest_client::failing;
void kvtest_client::get(long ikey, Str *value)
{
quick_istr key(ikey);
if (!q_[0].run_get1(tree->table(), key.string(), 0, *value, *ti_))
*value = Str();
}
void kvtest_client::get(const Str &key)
{
Str val;
(void) q_[0].run_get1(tree->table(), key, 0, val, *ti_);
}
void kvtest_client::get_check(const Str &key, const Str &expected)
{
Str val;
if (!q_[0].run_get1(tree->table(), key, 0, val, *ti_)) {
fail("get(%.*s) failed (expected %.*s)\n", key.len, key.s, expected.len, expected.s);
return;
}
if (val.len != expected.len || memcmp(val.s, expected.s, val.len) != 0)
fail("get(%.*s) returned unexpected value %.*s (expected %.*s)\n", key.len, key.s,
std::min(val.len, 40), val.s, std::min(expected.len, 40), expected.s);
else
++checks_;
}
void kvtest_client::get_col_check(const Str &key, int col, const Str &expected)
{
Str val;
if (!q_[0].run_get1(tree->table(), key, col, val, *ti_)) {
fail("get.%d(%.*s) failed (expected %.*s)\n", col, key.len, key.s,
expected.len, expected.s);
return;
}
if (val.len != expected.len || memcmp(val.s, expected.s, val.len) != 0)
fail("get.%d(%.*s) returned unexpected value %.*s (expected %.*s)\n",
col, key.len, key.s, std::min(val.len, 40), val.s,
std::min(expected.len, 40), expected.s);
else
++checks_;
}
bool kvtest_client::get_sync(long ikey) {
quick_istr key(ikey);
Str val;
return q_[0].run_get1(tree->table(), key.string(), 0, val, *ti_);
}
void kvtest_client::put(const Str &key, const Str &value) {
while (failing)
/* do nothing */;
q_[0].run_replace(tree->table(), key, value, *ti_);
if (ti_->logger()) // NB may block
ti_->logger()->record(logcmd_replace, q_[0].query_times(), key, value);
}
void kvtest_client::put_col(const Str &key, int col, const Str &value) {
while (failing)
/* do nothing */;
#if !MASSTREE_ROW_TYPE_STR
if (!kvo_)
kvo_ = new_kvout(-1, 2048);
Json req[2] = {Json(col), Json(String::make_stable(value))};
(void) q_[0].run_put(tree->table(), key, &req[0], &req[2], *ti_);
if (ti_->logger()) // NB may block
ti_->logger()->record(logcmd_put, q_[0].query_times(), key,
&req[0], &req[2]);
#else
(void) key, (void) col, (void) value;
assert(0);
#endif
}
bool kvtest_client::remove_sync(long ikey) {
quick_istr key(ikey);
bool removed = q_[0].run_remove(tree->table(), key.string(), *ti_);
if (removed && ti_->logger()) // NB may block
ti_->logger()->record(logcmd_remove, q_[0].query_times(), key.string(), Str());
return removed;
}
String kvtest_client::make_message(StringAccum &sa) const {
const char *begin = sa.begin();
while (begin != sa.end() && isspace((unsigned char) *begin))
++begin;
String s = String(begin, sa.end());
if (!s.empty() && s.back() != '\n')
s += '\n';
return s;
}
void kvtest_client::notice(const char *fmt, ...) {
va_list val;
va_start(val, fmt);
String m = make_message(StringAccum().vsnprintf(500, fmt, val));
va_end(val);
if (m)
fprintf(stderr, "%d: %s", ti_->index(), m.c_str());
}
void kvtest_client::fail(const char *fmt, ...) {
static nodeversion32 failing_lock(false);
static nodeversion32 fail_message_lock(false);
static String fail_message;
failing = 1;
va_list val;
va_start(val, fmt);
String m = make_message(StringAccum().vsnprintf(500, fmt, val));
va_end(val);
if (!m)
m = "unknown failure";
fail_message_lock.lock();
if (fail_message != m) {
fail_message = m;
fprintf(stderr, "%d: %s", ti_->index(), m.c_str());
}
fail_message_lock.unlock();
if (doprint) {
failing_lock.lock();
fprintf(stdout, "%d: %s", ti_->index(), m.c_str());
tree->print(stdout);
fflush(stdout);
}
always_assert(0);
}
static void* testgo(void* x) {
kvtest_client *kc = reinterpret_cast<kvtest_client*>(x);
kc->ti_->pthread() = pthread_self();
prepare_thread(kc->ti_);
if (strcmp(kc->testname_, "rw1") == 0)
kvtest_rw1(*kc);
else if (strcmp(kc->testname_, "rw2") == 0)
kvtest_rw2(*kc);
else if (strcmp(kc->testname_, "rw3") == 0)
kvtest_rw3(*kc);
else if (strcmp(kc->testname_, "rw4") == 0)
kvtest_rw4(*kc);
else if (strcmp(kc->testname_, "rwsmall24") == 0)
kvtest_rwsmall24(*kc);
else if (strcmp(kc->testname_, "rwsep24") == 0)
kvtest_rwsep24(*kc);
else if (strcmp(kc->testname_, "palma") == 0)
kvtest_palma(*kc);
else if (strcmp(kc->testname_, "palmb") == 0)
kvtest_palmb(*kc);
else if (strcmp(kc->testname_, "rw16") == 0)
kvtest_rw16(*kc);
else if (strcmp(kc->testname_, "rw5") == 0
|| strcmp(kc->testname_, "rw1fixed") == 0)
kvtest_rw1fixed(*kc);
else if (strcmp(kc->testname_, "ycsbk") == 0)
kvtest_ycsbk(*kc);
else if (strcmp(kc->testname_, "wd1") == 0)
kvtest_wd1(10000000, 1, *kc);
else if (strcmp(kc->testname_, "wd1check") == 0)
kvtest_wd1_check(10000000, 1, *kc);
else if (strcmp(kc->testname_, "w1") == 0)
kvtest_w1_seed(*kc, kvtest_first_seed + kc->id());
else if (strcmp(kc->testname_, "r1") == 0)
kvtest_r1_seed(*kc, kvtest_first_seed + kc->id());
else if (strcmp(kc->testname_, "wcol1") == 0)
kvtest_wcol1at(*kc, kc->id() % 24, kvtest_first_seed + kc->id() % 48, 5000000);
else if (strcmp(kc->testname_, "rcol1") == 0)
kvtest_rcol1at(*kc, kc->id() % 24, kvtest_first_seed + kc->id() % 48, 5000000);
else
kc->fail("unknown test '%s'", kc->testname_);
return 0;
}
static const char * const kvstats_name[] = {
"ops", "ops_per_sec", "puts", "gets", "scans", "puts_per_sec", "gets_per_sec", "scans_per_sec"
};
void runtest(const char *testname, int nthreads) {
std::vector<kvtest_client> clients(nthreads, kvtest_client(testname));
::testthreads = nthreads;
for (int i = 0; i < nthreads; ++i)
clients[i].set_thread(threadinfo::make(threadinfo::TI_PROCESS, i));
bzero((void *)timeout, sizeof(timeout));
signal(SIGALRM, test_timeout);
if (duration[0])
xalarm(duration[0]);
for (int i = 0; i < nthreads; ++i) {
int r = pthread_create(&clients[i].ti_->pthread(), 0, testgo, &clients[i]);
always_assert(r == 0);
}
for (int i = 0; i < nthreads; ++i)
pthread_join(clients[i].ti_->pthread(), 0);
kvstats kvs[arraysize(kvstats_name)];
for (int i = 0; i < nthreads; ++i)
for (int j = 0; j < (int) arraysize(kvstats_name); ++j)
if (double x = clients[i].report_.get_d(kvstats_name[j]))
kvs[j].add(x);
for (int j = 0; j < (int) arraysize(kvstats_name); ++j)
kvs[j].print_report(kvstats_name[j]);
}
struct conn {
int fd;
enum { inbufsz = 20 * 1024, inbufrefill = 16 * 1024 };
conn(int s)
: fd(s), inbuf_(new char[inbufsz]),
inbufpos_(0), inbuflen_(0), kvout(new_kvout(s, 20 * 1024)),
inbuftotal_(0) {
}
~conn() {
close(fd);
free_kvout(kvout);
delete[] inbuf_;
for (char* x : oldinbuf_)
delete[] x;
}
Json& receive() {
while (!parser_.done() && check(2))
inbufpos_ += parser_.consume(inbuf_ + inbufpos_,
inbuflen_ - inbufpos_,
String::make_stable(inbuf_, inbufsz));
if (parser_.success() && parser_.result().is_a())
parser_.reset();
else
parser_.result() = Json();
return parser_.result();
}
int check(int tryhard) {
if (inbufpos_ == inbuflen_ && tryhard)
hard_check(tryhard);
return inbuflen_ - inbufpos_;
}
uint64_t xposition() const {
return inbuftotal_ + inbufpos_;
}
Str recent_string(uint64_t xposition) const {
if (xposition - inbuftotal_ <= unsigned(inbufpos_))
return Str(inbuf_ + (xposition - inbuftotal_),
inbuf_ + inbufpos_);
else
return Str();
}
private:
char* inbuf_;
int inbufpos_;
int inbuflen_;
std::vector<char*> oldinbuf_;
msgpack::streaming_parser parser_;
public:
struct kvout *kvout;
private:
uint64_t inbuftotal_;
void hard_check(int tryhard);
};
void conn::hard_check(int tryhard) {
masstree_precondition(inbufpos_ == inbuflen_);
if (parser_.empty()) {
inbuftotal_ += inbufpos_;
inbufpos_ = inbuflen_ = 0;
for (auto x : oldinbuf_)
delete[] x;
oldinbuf_.clear();
} else if (inbufpos_ == inbufsz) {
oldinbuf_.push_back(inbuf_);
inbuf_ = new char[inbufsz];
inbuftotal_ += inbufpos_;
inbufpos_ = inbuflen_ = 0;
}
if (tryhard == 1) {
fd_set rfds;
FD_ZERO(&rfds);
FD_SET(fd, &rfds);
struct timeval tv = {0, 0};
if (select(fd + 1, &rfds, NULL, NULL, &tv) <= 0)
return;
} else
kvflush(kvout);
ssize_t r = read(fd, inbuf_ + inbufpos_, inbufsz - inbufpos_);
if (r != -1)
inbuflen_ += r;
}
struct conninfo {
int s;
Json handshake;
};
/* main loop */
enum { clp_val_suffixdouble = Clp_ValFirstUser };
enum { opt_nolog = 1, opt_pin, opt_logdir, opt_port, opt_ckpdir, opt_duration,
opt_test, opt_test_name, opt_threads, opt_cores,
opt_print, opt_norun, opt_checkpoint, opt_limit, opt_epoch_interval };
static const Clp_Option options[] = {
{ "no-log", 0, opt_nolog, 0, 0 },
{ 0, 'n', opt_nolog, 0, 0 },
{ "no-run", 0, opt_norun, 0, 0 },
{ "pin", 'p', opt_pin, 0, Clp_Negate },
{ "logdir", 0, opt_logdir, Clp_ValString, 0 },
{ "ld", 0, opt_logdir, Clp_ValString, 0 },
{ "checkpoint", 'c', opt_checkpoint, Clp_ValDouble, Clp_Optional | Clp_Negate },
{ "ckp", 0, opt_checkpoint, Clp_ValDouble, Clp_Optional | Clp_Negate },
{ "ckpdir", 0, opt_ckpdir, Clp_ValString, 0 },
{ "ckdir", 0, opt_ckpdir, Clp_ValString, 0 },
{ "cd", 0, opt_ckpdir, Clp_ValString, 0 },
{ "port", 0, opt_port, Clp_ValInt, 0 },
{ "duration", 'd', opt_duration, Clp_ValDouble, 0 },
{ "limit", 'l', opt_limit, clp_val_suffixdouble, 0 },
{ "test", 0, opt_test, Clp_ValString, 0 },
{ "test-rw1", 0, opt_test_name, 0, 0 },
{ "test-rw2", 0, opt_test_name, 0, 0 },
{ "test-rw3", 0, opt_test_name, 0, 0 },
{ "test-rw4", 0, opt_test_name, 0, 0 },
{ "test-rw5", 0, opt_test_name, 0, 0 },
{ "test-rw16", 0, opt_test_name, 0, 0 },
{ "test-palm", 0, opt_test_name, 0, 0 },
{ "test-ycsbk", 0, opt_test_name, 0, 0 },
{ "test-rw1fixed", 0, opt_test_name, 0, 0 },
{ "threads", 'j', opt_threads, Clp_ValInt, 0 },
{ "cores", 0, opt_cores, Clp_ValString, 0 },
{ "print", 0, opt_print, 0, Clp_Negate },
{ "epoch-interval", 0, opt_epoch_interval, Clp_ValDouble, 0 }
};
int
main(int argc, char *argv[])
{
using std::swap;
int s, ret, yes = 1, i = 1, firstcore = -1, corestride = 1;
const char *dotest = 0;
nlogger = tcpthreads = udpthreads = nckthreads = sysconf(_SC_NPROCESSORS_ONLN);
Clp_Parser *clp = Clp_NewParser(argc, argv, (int) arraysize(options), options);
Clp_AddType(clp, clp_val_suffixdouble, Clp_DisallowOptions, clp_parse_suffixdouble, 0);
int opt;
double epoch_interval_ms = 1000;
while ((opt = Clp_Next(clp)) >= 0) {
switch (opt) {
case opt_nolog:
logging = false;
break;
case opt_pin:
pinthreads = !clp->negated;
break;
case opt_threads:
nlogger = tcpthreads = udpthreads = nckthreads = clp->val.i;
break;
case opt_logdir: {
const char *s = strtok((char *) clp->vstr, ",");
for (; s; s = strtok(NULL, ","))
logdirs.push_back(s);
break;
}
case opt_ckpdir: {
const char *s = strtok((char *) clp->vstr, ",");
for (; s; s = strtok(NULL, ","))
ckpdirs.push_back(s);
break;
}
case opt_checkpoint:
if (clp->negated || (clp->have_val && clp->val.d <= 0))
checkpoint_interval = -1;
else if (clp->have_val)
checkpoint_interval = clp->val.d;
else
checkpoint_interval = 30;
break;
case opt_port:
port = clp->val.i;
break;
case opt_duration:
duration[0] = clp->val.d;
break;
case opt_limit:
test_limit = (uint64_t) clp->val.d;
break;
case opt_test:
dotest = clp->vstr;
break;
case opt_test_name:
dotest = clp->option->long_name + 5;
break;
case opt_print:
doprint = !clp->negated;
break;
case opt_cores:
if (firstcore >= 0 || cores.size() > 0) {
Clp_OptionError(clp, "%<%O%> already given");
exit(EXIT_FAILURE);
} else {
const char *plus = strchr(clp->vstr, '+');
Json ij = Json::parse(clp->vstr),
aj = Json::parse(String("[") + String(clp->vstr) + String("]")),
pj1 = Json::parse(plus ? String(clp->vstr, plus) : "x"),
pj2 = Json::parse(plus ? String(plus + 1) : "x");
for (int i = 0; aj && i < aj.size(); ++i)
if (!aj[i].is_int() || aj[i].to_i() < 0)
aj = Json();
if (ij && ij.is_int() && ij.to_i() >= 0)
firstcore = ij.to_i(), corestride = 1;
else if (pj1 && pj2 && pj1.is_int() && pj1.to_i() >= 0 && pj2.is_int())
firstcore = pj1.to_i(), corestride = pj2.to_i();
else if (aj) {
for (int i = 0; i < aj.size(); ++i)
cores.push_back(aj[i].to_i());
} else {
Clp_OptionError(clp, "bad %<%O%>, expected %<CORE1%>, %<CORE1+STRIDE%>, or %<CORE1,CORE2,...%>");
exit(EXIT_FAILURE);
}
}
break;
case opt_norun:
recovery_only = true;
break;
case opt_epoch_interval:
epoch_interval_ms = clp->val.d;
break;
default:
fprintf(stderr, "Usage: mtd [-np] [--ld dir1[,dir2,...]] [--cd dir1[,dir2,...]]\n");
exit(EXIT_FAILURE);
}
}
Clp_DeleteParser(clp);
if (logdirs.empty())
logdirs.push_back(".");
if (ckpdirs.empty())
ckpdirs.push_back(".");
if (firstcore < 0)
firstcore = cores.size() ? cores.back() + 1 : 0;
for (; (int) cores.size() < udpthreads; firstcore += corestride)
cores.push_back(firstcore);
// for -pg profiling
signal(SIGINT, catchint);
// log epoch starts at 1
global_log_epoch = 1;
global_wake_epoch = 0;
log_epoch_interval.tv_sec = 0;
log_epoch_interval.tv_usec = 200000;
// set a timer for incrementing the global epoch
if (!dotest) {
if (!epoch_interval_ms) {
printf("WARNING: epoch interval is 0, it means no GC is executed\n");
} else {
signal(SIGALRM, epochinc);
struct itimerval etimer;
etimer.it_interval.tv_sec = epoch_interval_ms / 1000;
etimer.it_interval.tv_usec = fmod(epoch_interval_ms, 1000) * 1000;
etimer.it_value.tv_sec = epoch_interval_ms / 1000;
etimer.it_value.tv_usec = fmod(epoch_interval_ms, 1000) * 1000;
ret = setitimer(ITIMER_REAL, &etimer, NULL);
always_assert(ret == 0);
}
}
// for parallel recovery
ret = pthread_cond_init(&rec_cond, 0);
always_assert(ret == 0);
ret = pthread_mutex_init(&rec_mu, 0);
always_assert(ret == 0);
// for waking up the checkpoint thread
ret = pthread_cond_init(&checkpoint_cond, 0);
always_assert(ret == 0);
ret = pthread_mutex_init(&checkpoint_mu, 0);
always_assert(ret == 0);
threadinfo *main_ti = threadinfo::make(threadinfo::TI_MAIN, -1);
main_ti->pthread() = pthread_self();
initial_timestamp = timestamp();
tree = new Masstree::default_table;
tree->initialize(*main_ti);
printf("%s, %s, pin-threads %s, ", tree->name(), row_type::name(),
pinthreads ? "enabled" : "disabled");
if(logging){
printf("logging enabled\n");
log_init();
recover(main_ti);
} else {
printf("logging disabled\n");
}
// UDP threads, each with its own port.
if (udpthreads == 0)
printf("0 udp threads\n");
else if (udpthreads == 1)
printf("1 udp thread (port %d)\n", port);
else
printf("%d udp threads (ports %d-%d)\n", udpthreads, port, port + udpthreads - 1);
for(i = 0; i < udpthreads; i++){
threadinfo *ti = threadinfo::make(threadinfo::TI_PROCESS, i);
ret = pthread_create(&ti->pthread(), 0, udp_threadfunc, ti);
always_assert(ret == 0);
}
if (dotest) {
if (strcmp(dotest, "palm") == 0) {
runtest("palma", 1);
runtest("palmb", tcpthreads);
} else
runtest(dotest, tcpthreads);
tree->stats(stderr);
if (doprint)
tree->print(stdout);
exit(0);
}
// TCP socket and threads
s = socket(AF_INET, SOCK_STREAM, 0);
always_assert(s >= 0);
setsockopt(s, SOL_SOCKET, SO_REUSEADDR, &yes, sizeof(yes));
setsockopt(s, IPPROTO_TCP, TCP_NODELAY, &yes, sizeof(yes));
struct sockaddr_in sin;
sin.sin_family = AF_INET;
sin.sin_addr.s_addr = INADDR_ANY;
sin.sin_port = htons(port);
ret = bind(s, (struct sockaddr *) &sin, sizeof(sin));
if (ret < 0) {
perror("bind");
exit(EXIT_FAILURE);
}
ret = listen(s, 100);
if (ret < 0) {
perror("listen");
exit(EXIT_FAILURE);
}
threadinfo **tcpti = new threadinfo *[tcpthreads];
tcp_thread_pipes = new int[tcpthreads * 2];
printf("%d tcp threads (port %d)\n", tcpthreads, port);
for(i = 0; i < tcpthreads; i++){
threadinfo *ti = threadinfo::make(threadinfo::TI_PROCESS, i);
ret = pipe(&tcp_thread_pipes[i * 2]);
always_assert(ret == 0);
ret = pthread_create(&ti->pthread(), 0, tcp_threadfunc, ti);
always_assert(ret == 0);
tcpti[i] = ti;
}
// Create a canceling thread.
ret = pipe(quit_pipe);
always_assert(ret == 0);
pthread_t canceling_tid;
ret = pthread_create(&canceling_tid, NULL, canceling, NULL);
always_assert(ret == 0);
static int next = 0;
while(1){
int s1;
struct sockaddr_in sin1;
socklen_t sinlen = sizeof(sin1);
bzero(&sin1, sizeof(sin1));
s1 = accept(s, (struct sockaddr *) &sin1, &sinlen);
always_assert(s1 >= 0);
setsockopt(s1, IPPROTO_TCP, TCP_NODELAY, &yes, sizeof(yes));
// Complete handshake.
char buf[BUFSIZ];
ssize_t nr = read(s1, buf, BUFSIZ);
if (nr == -1) {
perror("read");
kill_connection:
close(s1);
continue;
}
msgpack::streaming_parser sp;
if (nr == 0 || sp.consume(buf, nr) != (size_t) nr
|| !sp.result().is_a() || sp.result().size() < 2
|| !sp.result()[1].is_i() || sp.result()[1].as_i() != Cmd_Handshake) {
fprintf(stderr, "failed handshake\n");
goto kill_connection;
}
int target_core = -1;
if (sp.result().size() >= 3 && sp.result()[2].is_o()
&& sp.result()[2]["core"].is_i())
target_core = sp.result()[2]["core"].as_i();
if (target_core < 0 || target_core >= tcpthreads) {
target_core = next % tcpthreads;
++next;
}
conninfo* ci = new conninfo;
ci->s = s1;
swap(ci->handshake, sp.result());
ssize_t w = write(tcp_thread_pipes[2*target_core + 1], &ci, sizeof(ci));
always_assert((size_t) w == sizeof(ci));
}
}
void
catchint(int)
{
go_quit = 1;
char cmd = 0;
// Does not matter if the write fails (when the pipe is full)
int r = write(quit_pipe[1], &cmd, sizeof(cmd));
(void)r;
}
inline const char *threadtype(int type) {
switch (type) {
case threadinfo::TI_MAIN:
return "main";
case threadinfo::TI_PROCESS:
return "process";
case threadinfo::TI_LOG:
return "log";
case threadinfo::TI_CHECKPOINT:
return "checkpoint";
default:
always_assert(0 && "Unknown threadtype");
break;
};
}
void *
canceling(void *)
{
char cmd;
int r = read(quit_pipe[0], &cmd, sizeof(cmd));
(void) r;
assert(r == sizeof(cmd) && cmd == 0);
// Cancel wake up checkpointing threads
pthread_mutex_lock(&checkpoint_mu);
pthread_cond_signal(&checkpoint_cond);
pthread_mutex_unlock(&checkpoint_mu);
fprintf(stderr, "\n");
// cancel outstanding threads. Checkpointing threads will exit safely
// when the checkpointing thread 0 sees go_quit, and don't need cancel
for (threadinfo *ti = threadinfo::allthreads; ti; ti = ti->next())
if (ti->purpose() != threadinfo::TI_MAIN
&& ti->purpose() != threadinfo::TI_CHECKPOINT) {
int r = pthread_cancel(ti->pthread());
always_assert(r == 0);
}
// join canceled threads
for (threadinfo *ti = threadinfo::allthreads; ti; ti = ti->next())
if (ti->purpose() != threadinfo::TI_MAIN) {
fprintf(stderr, "joining thread %s:%d\n",
threadtype(ti->purpose()), ti->index());
int r = pthread_join(ti->pthread(), 0);
always_assert(r == 0);
}
tree->stats(stderr);
exit(0);
}
void
epochinc(int)
{
globalepoch += 2;
active_epoch = threadinfo::min_active_epoch();
}
// Return 1 if success, -1 if I/O error or protocol unmatch
int handshake(Json& request, threadinfo& ti) {
always_assert(request.is_a() && request.size() >= 2
&& request[1].is_i() && request[1].as_i() == Cmd_Handshake
&& (request.size() == 2 || request[2].is_o()));
if (request.size() >= 2
&& request[2]["maxkeylen"].is_i()
&& request[2]["maxkeylen"].as_i() > MASSTREE_MAXKEYLEN) {
request[2] = false;
request[3] = "bad maxkeylen";
request.resize(4);
} else {
request[2] = true;
request[3] = ti.index();
request[4] = row_type::name();
request.resize(5);
}
request[1] = Cmd_Handshake + 1;
return request[2].as_b() ? 1 : -1;
}
// execute command, return result.
int onego(query<row_type>& q, Json& request, Str request_str, threadinfo& ti) {
int command = request[1].as_i();
if (command == Cmd_Checkpoint) {
// force checkpoint
pthread_mutex_lock(&checkpoint_mu);
pthread_cond_broadcast(&checkpoint_cond);
pthread_mutex_unlock(&checkpoint_mu);
request.resize(2);
} else if (command == Cmd_Get) {
q.run_get(tree->table(), request, ti);
} else if (command == Cmd_Put && request.size() > 3
&& (request.size() % 2) == 1) { // insert or update
Str key(request[2].as_s());
const Json* req = request.array_data() + 3;
const Json* end_req = request.end_array_data();
request[2] = q.run_put(tree->table(), request[2].as_s(),
req, end_req, ti);
if (ti.logger() && request_str) {
// use the client's parsed version of the request
msgpack::parser mp(request_str.data());
mp.skip_array_size().skip_primitives(3);
ti.logger()->record(logcmd_put, q.query_times(), key, Str(mp.position(), request_str.end()));
} else if (ti.logger())
ti.logger()->record(logcmd_put, q.query_times(), key, req, end_req);
request.resize(3);
} else if (command == Cmd_Replace) { // insert or update
Str key(request[2].as_s()), value(request[3].as_s());
request[2] = q.run_replace(tree->table(), key, value, ti);
if (ti.logger()) // NB may block
ti.logger()->record(logcmd_replace, q.query_times(), key, value);
request.resize(3);
} else if (command == Cmd_Remove) { // remove
Str key(request[2].as_s());
bool removed = q.run_remove(tree->table(), key, ti);
if (removed && ti.logger()) // NB may block
ti.logger()->record(logcmd_remove, q.query_times(), key, Str());
request[2] = removed;
request.resize(3);
} else if (command == Cmd_Scan) {
q.run_scan(tree->table(), request, ti);
} else {
request[1] = -1;