diff options
Diffstat (limited to 'examples/performance-thread/pthread_shim')
| -rw-r--r-- | examples/performance-thread/pthread_shim/Makefile | 60 | ||||
| -rw-r--r-- | examples/performance-thread/pthread_shim/main.c | 287 | ||||
| -rw-r--r-- | examples/performance-thread/pthread_shim/pthread_shim.c | 719 | ||||
| -rw-r--r-- | examples/performance-thread/pthread_shim/pthread_shim.h | 113 |
4 files changed, 1179 insertions, 0 deletions
diff --git a/examples/performance-thread/pthread_shim/Makefile b/examples/performance-thread/pthread_shim/Makefile new file mode 100644 index 00000000..86ac657c --- /dev/null +++ b/examples/performance-thread/pthread_shim/Makefile @@ -0,0 +1,60 @@ +# BSD LICENSE +# +# Copyright(c) 2015 Intel Corporation. All rights reserved. +# All rights reserved. +# +# Redistribution and use in source and binary forms, with or without +# modification, are permitted provided that the following conditions +# are met: +# +# * Redistributions of source code must retain the above copyright +# notice, this list of conditions and the following disclaimer. +# * Redistributions in binary form must reproduce the above copyright +# notice, this list of conditions and the following disclaimer in +# the documentation and/or other materials provided with the +# distribution. +# * Neither the name of Intel Corporation nor the names of its +# contributors may be used to endorse or promote products derived +# from this software without specific prior written permission. +# +# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR +# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT +# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, +# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT +# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE +# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + +ifeq ($(RTE_SDK),) +$(error "Please define RTE_SDK environment variable") +endif + +# Default target, can be overridden by command line or environment +RTE_TARGET ?= x86_64-native-linuxapp-gcc + +include $(RTE_SDK)/mk/rte.vars.mk + +# binary name +APP = lthread_pthread_shim + +# all source are stored in SRCS-y +SRCS-y := main.c pthread_shim.c +INCLUDES := -I$(RTE_SDK)/$(RTE_TARGET)/include -I$(SRCDIR) +include $(RTE_SDK)/examples/performance-thread/common/common.mk + +CFLAGS += -g -O3 $(USER_FLAGS) $(INCLUDES) +CFLAGS += $(WERROR_FLAGS) + +LDFLAGS += -lpthread + +# workaround for a gcc bug with noreturn attribute +# http://gcc.gnu.org/bugzilla/show_bug.cgi?id=12603 +ifeq ($(CONFIG_RTE_TOOLCHAIN_GCC),y) +CFLAGS_main.o += -Wno-return-type +endif + +include $(RTE_SDK)/mk/rte.extapp.mk diff --git a/examples/performance-thread/pthread_shim/main.c b/examples/performance-thread/pthread_shim/main.c new file mode 100644 index 00000000..f0357218 --- /dev/null +++ b/examples/performance-thread/pthread_shim/main.c @@ -0,0 +1,287 @@ + +/*- + * BSD LICENSE + * + * Copyright(c) 2015 Intel Corporation. All rights reserved. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * * Neither the name of Intel Corporation nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#define _GNU_SOURCE +#include <stdio.h> +#include <stdlib.h> +#include <stdint.h> +#include <inttypes.h> +#include <sys/types.h> +#include <string.h> +#include <sys/queue.h> +#include <stdarg.h> +#include <errno.h> +#include <getopt.h> +#include <unistd.h> +#include <sched.h> +#include <pthread.h> + +#include <rte_common.h> +#include <rte_lcore.h> +#include <rte_per_lcore.h> +#include <rte_timer.h> + +#include "lthread_api.h" +#include "lthread_diag_api.h" +#include "pthread_shim.h" + +#define DEBUG_APP 0 +#define HELLOW_WORLD_MAX_LTHREADS 10 + +__thread int print_count; +__thread pthread_mutex_t print_lock; + +__thread pthread_mutex_t exit_lock; +__thread pthread_cond_t exit_cond; + +/* + * A simple thread that demonstrates use of a mutex, a condition + * variable, thread local storage, explicit yield, and thread exit. + * + * The thread uses a mutex to protect a shared counter which is incremented + * and then it waits on condition variable before exiting. + * + * The thread argument is stored in and retrieved from TLS, using + * the pthread key create, get and set specific APIs. + * + * The thread yields while holding the mutex, to provide opportunity + * for other threads to contend. + * + * All of the pthread API functions used by this thread are actually + * resolved to corresponding lthread functions by the pthread shim + * implemented in pthread_shim.c + */ +void *helloworld_pthread(void *arg); +void *helloworld_pthread(void *arg) +{ + pthread_key_t key; + + /* create a key for TLS */ + pthread_key_create(&key, NULL); + + /* store the arg in TLS */ + pthread_setspecific(key, arg); + + /* grab lock and increment shared counter */ + pthread_mutex_lock(&print_lock); + print_count++; + + /* yield thread to give opportunity for lock contention */ + pthread_yield(); + + /* retrieve arg from TLS */ + uint64_t thread_no = (uint64_t) pthread_getspecific(key); + + printf("Hello - lcore = %d count = %d thread_no = %d thread_id = %p\n", + sched_getcpu(), + print_count, + (int) thread_no, + (void *)pthread_self()); + + /* release the lock */ + pthread_mutex_unlock(&print_lock); + + /* + * wait on condition variable + * before exiting + */ + pthread_mutex_lock(&exit_lock); + pthread_cond_wait(&exit_cond, &exit_lock); + pthread_mutex_unlock(&exit_lock); + + /* exit */ + pthread_exit((void *) thread_no); +} + + +/* + * This is the initial thread + * + * It demonstrates pthread, mutex and condition variable creation, + * broadcast and pthread join APIs. + * + * This initial thread must always start life as an lthread. + * + * This thread creates many more threads then waits a short time + * before signalling them to exit using a broadcast. + * + * All of the pthread API functions used by this thread are actually + * resolved to corresponding lthread functions by the pthread shim + * implemented in pthread_shim.c + * + * After all threads have finished the lthread scheduler is shutdown + * and normal pthread operation is restored + */ +__thread pthread_t tid[HELLOW_WORLD_MAX_LTHREADS]; + +static void initial_lthread(void *args); +static void initial_lthread(void *args __attribute__((unused))) +{ + int lcore = (int) rte_lcore_id(); + /* + * + * We can now enable pthread API override + * and start to use the pthread APIs + */ + pthread_override_set(1); + + uint64_t i; + + /* initialize mutex for shared counter */ + print_count = 0; + pthread_mutex_init(&print_lock, NULL); + + /* initialize mutex and condition variable controlling thread exit */ + pthread_mutex_init(&exit_lock, NULL); + pthread_cond_init(&exit_cond, NULL); + + /* spawn a number of threads */ + for (i = 0; i < HELLOW_WORLD_MAX_LTHREADS; i++) { + + /* + * Not strictly necessary but + * for the sake of this example + * use an attribute to pass the desired lcore + */ + pthread_attr_t attr; + cpu_set_t cpuset; + + CPU_ZERO(&cpuset); + CPU_SET(lcore, &cpuset); + pthread_attr_init(&attr); + pthread_attr_setaffinity_np(&attr, sizeof(cpu_set_t), &cpuset); + + /* create the thread */ + pthread_create(&tid[i], &attr, helloworld_pthread, (void *) i); + } + + /* wait for 1s to allow threads + * to block on the condition variable + * N.B. nanosleep() is resolved to lthread_sleep() + * by the shim. + */ + struct timespec time; + + time.tv_sec = 1; + time.tv_nsec = 0; + nanosleep(&time, NULL); + + /* wake up all the threads */ + pthread_cond_broadcast(&exit_cond); + + /* wait for them to finish */ + for (i = 0; i < HELLOW_WORLD_MAX_LTHREADS; i++) { + + uint64_t thread_no; + + pthread_join(tid[i], (void *) &thread_no); + if (thread_no != i) + printf("error on thread exit\n"); + } + + pthread_cond_destroy(&exit_cond); + pthread_mutex_destroy(&print_lock); + pthread_mutex_destroy(&exit_lock); + + /* shutdown the lthread scheduler */ + lthread_scheduler_shutdown(rte_lcore_id()); + lthread_detach(); +} + + + +/* This thread creates a single initial lthread + * and then runs the scheduler + * An instance of this thread is created on each thread + * in the core mask + */ +static int +lthread_scheduler(void *args); +static int +lthread_scheduler(void *args __attribute__((unused))) +{ + /* create initial thread */ + struct lthread *lt; + + lthread_create(<, -1, initial_lthread, (void *) NULL); + + /* run the lthread scheduler */ + lthread_run(); + + /* restore genuine pthread operation */ + pthread_override_set(0); + return 0; +} + +int main(int argc, char **argv) +{ + int num_sched = 0; + + /* basic DPDK initialization is all that is necessary to run lthreads*/ + int ret = rte_eal_init(argc, argv); + + if (ret < 0) + rte_exit(EXIT_FAILURE, "Invalid EAL parameters\n"); + + /* enable timer subsystem */ + rte_timer_subsystem_init(); + +#if DEBUG_APP + lthread_diagnostic_set_mask(LT_DIAG_ALL); +#endif + + /* create a scheduler on every core in the core mask + * and launch an initial lthread that will spawn many more. + */ + unsigned lcore_id; + + for (lcore_id = 0; lcore_id < RTE_MAX_LCORE; lcore_id++) { + if (rte_lcore_is_enabled(lcore_id)) + num_sched++; + } + + /* set the number of schedulers, this forces all schedulers synchronize + * before entering their main loop + */ + lthread_num_schedulers_set(num_sched); + + /* launch all threads */ + rte_eal_mp_remote_launch(lthread_scheduler, (void *)NULL, CALL_MASTER); + + /* wait for threads to stop */ + RTE_LCORE_FOREACH_SLAVE(lcore_id) { + rte_eal_wait_lcore(lcore_id); + } + return 0; +} diff --git a/examples/performance-thread/pthread_shim/pthread_shim.c b/examples/performance-thread/pthread_shim/pthread_shim.c new file mode 100644 index 00000000..93c3216d --- /dev/null +++ b/examples/performance-thread/pthread_shim/pthread_shim.c @@ -0,0 +1,719 @@ +/*- + * BSD LICENSE + * + * Copyright(c) 2015 Intel Corporation. All rights reserved. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * * Neither the name of Intel Corporation nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#include <stdio.h> +#include <stdlib.h> +#include <sys/types.h> +#include <errno.h> +#define __USE_GNU +#include <sched.h> +#include <dlfcn.h> + +#include <rte_log.h> + +#include "lthread_api.h" +#include "pthread_shim.h" + +#define RTE_LOGTYPE_PTHREAD_SHIM RTE_LOGTYPE_USER3 + +#define POSIX_ERRNO(x) (x) + +/* + * this flag determines at run time if we override pthread + * calls and map then to equivalent lthread calls + * or of we call the standard pthread function + */ +static __thread int override; + + +/* + * this structures contains function pointers that will be + * initialised to the loaded address of the real + * pthread library API functions + */ +struct pthread_lib_funcs { +int (*f_pthread_barrier_destroy) + (pthread_barrier_t *); +int (*f_pthread_barrier_init) + (pthread_barrier_t *, const pthread_barrierattr_t *, unsigned); +int (*f_pthread_barrier_wait) + (pthread_barrier_t *); +int (*f_pthread_cond_broadcast) + (pthread_cond_t *); +int (*f_pthread_cond_destroy) + (pthread_cond_t *); +int (*f_pthread_cond_init) + (pthread_cond_t *, const pthread_condattr_t *); +int (*f_pthread_cond_signal) + (pthread_cond_t *); +int (*f_pthread_cond_timedwait) + (pthread_cond_t *, pthread_mutex_t *, const struct timespec *); +int (*f_pthread_cond_wait) + (pthread_cond_t *, pthread_mutex_t *); +int (*f_pthread_create) + (pthread_t *, const pthread_attr_t *, void *(*)(void *), void *); +int (*f_pthread_detach) + (pthread_t); +int (*f_pthread_equal) + (pthread_t, pthread_t); +void (*f_pthread_exit) + (void *); +void * (*f_pthread_getspecific) + (pthread_key_t); +int (*f_pthread_getcpuclockid) + (pthread_t, clockid_t *); +int (*f_pthread_join) + (pthread_t, void **); +int (*f_pthread_key_create) + (pthread_key_t *, void (*) (void *)); +int (*f_pthread_key_delete) + (pthread_key_t); +int (*f_pthread_mutex_destroy) + (pthread_mutex_t *__mutex); +int (*f_pthread_mutex_init) + (pthread_mutex_t *__mutex, const pthread_mutexattr_t *); +int (*f_pthread_mutex_lock) + (pthread_mutex_t *__mutex); +int (*f_pthread_mutex_trylock) + (pthread_mutex_t *__mutex); +int (*f_pthread_mutex_timedlock) + (pthread_mutex_t *__mutex, const struct timespec *); +int (*f_pthread_mutex_unlock) + (pthread_mutex_t *__mutex); +int (*f_pthread_once) + (pthread_once_t *, void (*) (void)); +int (*f_pthread_rwlock_destroy) + (pthread_rwlock_t *__rwlock); +int (*f_pthread_rwlock_init) + (pthread_rwlock_t *__rwlock, const pthread_rwlockattr_t *); +int (*f_pthread_rwlock_rdlock) + (pthread_rwlock_t *__rwlock); +int (*f_pthread_rwlock_timedrdlock) + (pthread_rwlock_t *__rwlock, const struct timespec *); +int (*f_pthread_rwlock_timedwrlock) + (pthread_rwlock_t *__rwlock, const struct timespec *); +int (*f_pthread_rwlock_tryrdlock) + (pthread_rwlock_t *__rwlock); +int (*f_pthread_rwlock_trywrlock) + (pthread_rwlock_t *__rwlock); +int (*f_pthread_rwlock_unlock) + (pthread_rwlock_t *__rwlock); +int (*f_pthread_rwlock_wrlock) + (pthread_rwlock_t *__rwlock); +pthread_t (*f_pthread_self) + (void); +int (*f_pthread_setspecific) + (pthread_key_t, const void *); +int (*f_pthread_spin_init) + (pthread_spinlock_t *__spin, int); +int (*f_pthread_spin_destroy) + (pthread_spinlock_t *__spin); +int (*f_pthread_spin_lock) + (pthread_spinlock_t *__spin); +int (*f_pthread_spin_trylock) + (pthread_spinlock_t *__spin); +int (*f_pthread_spin_unlock) + (pthread_spinlock_t *__spin); +int (*f_pthread_cancel) + (pthread_t); +int (*f_pthread_setcancelstate) + (int, int *); +int (*f_pthread_setcanceltype) + (int, int *); +void (*f_pthread_testcancel) + (void); +int (*f_pthread_getschedparam) + (pthread_t pthread, int *, struct sched_param *); +int (*f_pthread_setschedparam) + (pthread_t, int, const struct sched_param *); +int (*f_pthread_yield) + (void); +int (*f_pthread_setaffinity_np) + (pthread_t thread, size_t cpusetsize, const cpu_set_t *cpuset); +int (*f_nanosleep) + (const struct timespec *req, struct timespec *rem); +} _sys_pthread_funcs = { + .f_pthread_barrier_destroy = NULL, +}; + + +/* + * this macro obtains the loaded address of a library function + * and saves it. + */ +static void *__libc_dl_handle = RTLD_NEXT; + +#define get_addr_of_loaded_symbol(name) do { \ + char *error_str; \ + _sys_pthread_funcs.f_##name = dlsym(__libc_dl_handle, (#name)); \ + error_str = dlerror(); \ + if (error_str != NULL) { \ + fprintf(stderr, "%s\n", error_str); \ + } \ +} while (0) + + +/* + * The constructor function initialises the + * function pointers for pthread library functions + */ +void +pthread_intercept_ctor(void)__attribute__((constructor)); +void +pthread_intercept_ctor(void) +{ + override = 0; + /* + * Get the original functions + */ + get_addr_of_loaded_symbol(pthread_barrier_destroy); + get_addr_of_loaded_symbol(pthread_barrier_init); + get_addr_of_loaded_symbol(pthread_barrier_wait); + get_addr_of_loaded_symbol(pthread_cond_broadcast); + get_addr_of_loaded_symbol(pthread_cond_destroy); + get_addr_of_loaded_symbol(pthread_cond_init); + get_addr_of_loaded_symbol(pthread_cond_signal); + get_addr_of_loaded_symbol(pthread_cond_timedwait); + get_addr_of_loaded_symbol(pthread_cond_wait); + get_addr_of_loaded_symbol(pthread_create); + get_addr_of_loaded_symbol(pthread_detach); + get_addr_of_loaded_symbol(pthread_equal); + get_addr_of_loaded_symbol(pthread_exit); + get_addr_of_loaded_symbol(pthread_getspecific); + get_addr_of_loaded_symbol(pthread_getcpuclockid); + get_addr_of_loaded_symbol(pthread_join); + get_addr_of_loaded_symbol(pthread_key_create); + get_addr_of_loaded_symbol(pthread_key_delete); + get_addr_of_loaded_symbol(pthread_mutex_destroy); + get_addr_of_loaded_symbol(pthread_mutex_init); + get_addr_of_loaded_symbol(pthread_mutex_lock); + get_addr_of_loaded_symbol(pthread_mutex_trylock); + get_addr_of_loaded_symbol(pthread_mutex_timedlock); + get_addr_of_loaded_symbol(pthread_mutex_unlock); + get_addr_of_loaded_symbol(pthread_once); + get_addr_of_loaded_symbol(pthread_rwlock_destroy); + get_addr_of_loaded_symbol(pthread_rwlock_init); + get_addr_of_loaded_symbol(pthread_rwlock_rdlock); + get_addr_of_loaded_symbol(pthread_rwlock_timedrdlock); + get_addr_of_loaded_symbol(pthread_rwlock_timedwrlock); + get_addr_of_loaded_symbol(pthread_rwlock_tryrdlock); + get_addr_of_loaded_symbol(pthread_rwlock_trywrlock); + get_addr_of_loaded_symbol(pthread_rwlock_unlock); + get_addr_of_loaded_symbol(pthread_rwlock_wrlock); + get_addr_of_loaded_symbol(pthread_self); + get_addr_of_loaded_symbol(pthread_setspecific); + get_addr_of_loaded_symbol(pthread_spin_init); + get_addr_of_loaded_symbol(pthread_spin_destroy); + get_addr_of_loaded_symbol(pthread_spin_lock); + get_addr_of_loaded_symbol(pthread_spin_trylock); + get_addr_of_loaded_symbol(pthread_spin_unlock); + get_addr_of_loaded_symbol(pthread_cancel); + get_addr_of_loaded_symbol(pthread_setcancelstate); + get_addr_of_loaded_symbol(pthread_setcanceltype); + get_addr_of_loaded_symbol(pthread_testcancel); + get_addr_of_loaded_symbol(pthread_getschedparam); + get_addr_of_loaded_symbol(pthread_setschedparam); + get_addr_of_loaded_symbol(pthread_yield); + get_addr_of_loaded_symbol(pthread_setaffinity_np); + get_addr_of_loaded_symbol(nanosleep); +} + + +/* + * Enable/Disable pthread override + * state + * 0 disable + * 1 enable + */ +void pthread_override_set(int state) +{ + override = state; +} + + +/* + * Return pthread override state + * return + * 0 disable + * 1 enable + */ +int pthread_override_get(void) +{ + return override; +} + +/* + * This macro is used to catch and log + * invocation of stubs for unimplemented pthread + * API functions. + */ +#define NOT_IMPLEMENTED do { \ + if (override) { \ + RTE_LOG(WARNING, \ + PTHREAD_SHIM, \ + "WARNING %s NOT IMPLEMENTED\n", \ + __func__); \ + } \ +} while (0) + +/* + * pthread API override functions follow + * Note in this example code only a subset of functions are + * implemented. + * + * The stub functions provided will issue a warning log + * message if an unimplemented function is invoked + * + */ + +int pthread_barrier_destroy(pthread_barrier_t *a) +{ + NOT_IMPLEMENTED; + return _sys_pthread_funcs.f_pthread_barrier_destroy(a); +} + +int +pthread_barrier_init(pthread_barrier_t *a, + const pthread_barrierattr_t *b, unsigned c) +{ + NOT_IMPLEMENTED; + return _sys_pthread_funcs.f_pthread_barrier_init(a, b, c); +} + +int pthread_barrier_wait(pthread_barrier_t *a) +{ + NOT_IMPLEMENTED; + return _sys_pthread_funcs.f_pthread_barrier_wait(a); +} + +int pthread_cond_broadcast(pthread_cond_t *cond) +{ + if (override) { + + lthread_cond_broadcast(*(struct lthread_cond **)cond); + return 0; + } + return _sys_pthread_funcs.f_pthread_cond_broadcast(cond); +} + +int pthread_mutex_destroy(pthread_mutex_t *mutex) +{ + if (override) + return lthread_mutex_destroy(*(struct lthread_mutex **)mutex); + return _sys_pthread_funcs.f_pthread_mutex_destroy(mutex); +} + +int pthread_cond_destroy(pthread_cond_t *cond) +{ + if (override) + return lthread_cond_destroy(*(struct lthread_cond **)cond); + return _sys_pthread_funcs.f_pthread_cond_destroy(cond); +} + +int pthread_cond_init(pthread_cond_t *cond, const pthread_condattr_t *attr) +{ + if (override) + return lthread_cond_init(NULL, + (struct lthread_cond **)cond, + (const struct lthread_condattr *) attr); + return _sys_pthread_funcs.f_pthread_cond_init(cond, attr); +} + +int pthread_cond_signal(pthread_cond_t *cond) +{ + if (override) { + lthread_cond_signal(*(struct lthread_cond **)cond); + return 0; + } + return _sys_pthread_funcs.f_pthread_cond_signal(cond); +} + +int +pthread_cond_timedwait(pthread_cond_t *__restrict cond, + pthread_mutex_t *__restrict mutex, + const struct timespec *__restrict time) +{ + NOT_IMPLEMENTED; + return _sys_pthread_funcs.f_pthread_cond_timedwait(cond, mutex, time); +} + +int pthread_cond_wait(pthread_cond_t *cond, pthread_mutex_t *mutex) +{ + if (override) { + pthread_mutex_unlock(mutex); + int rv = lthread_cond_wait(*(struct lthread_cond **)cond, 0); + + pthread_mutex_lock(mutex); + return rv; + } + return _sys_pthread_funcs.f_pthread_cond_wait(cond, mutex); +} + +int +pthread_create(pthread_t *__restrict tid, + const pthread_attr_t *__restrict attr, + void *(func) (void *), + void *__restrict arg) +{ + if (override) { + int lcore = -1; + + if (attr != NULL) { + /* determine CPU being requested */ + cpu_set_t cpuset; + + CPU_ZERO(&cpuset); + pthread_attr_getaffinity_np(attr, + sizeof(cpu_set_t), + &cpuset); + + if (CPU_COUNT(&cpuset) != 1) + return POSIX_ERRNO(EINVAL); + + for (lcore = 0; lcore < LTHREAD_MAX_LCORES; lcore++) { + if (!CPU_ISSET(lcore, &cpuset)) + continue; + break; + } + } + return lthread_create((struct lthread **)tid, lcore, + (void (*)(void *))func, arg); + } + return _sys_pthread_funcs.f_pthread_create(tid, attr, func, arg); +} + +int pthread_detach(pthread_t tid) +{ + if (override) { + struct lthread *lt = (struct lthread *)tid; + + if (lt == lthread_current()) + lthread_detach(); + return 0; + NOT_IMPLEMENTED; + } + return _sys_pthread_funcs.f_pthread_detach(tid); +} + +int pthread_equal(pthread_t a, pthread_t b) +{ + NOT_IMPLEMENTED; + return _sys_pthread_funcs.f_pthread_equal(a, b); +} + +void pthread_exit_override(void *v) +{ + if (override) { + lthread_exit(v); + return; + } + _sys_pthread_funcs.f_pthread_exit(v); +} + +void +*pthread_getspecific(pthread_key_t key) +{ + if (override) + return lthread_getspecific((unsigned int) key); + return _sys_pthread_funcs.f_pthread_getspecific(key); +} + +int pthread_getcpuclockid(pthread_t a, clockid_t *b) +{ + NOT_IMPLEMENTED; + return _sys_pthread_funcs.f_pthread_getcpuclockid(a, b); +} + +int pthread_join(pthread_t tid, void **val) +{ + if (override) + return lthread_join((struct lthread *)tid, val); + return _sys_pthread_funcs.f_pthread_join(tid, val); +} + +int pthread_key_create(pthread_key_t *keyptr, void (*dtor) (void *)) +{ + if (override) + return lthread_key_create((unsigned int *)keyptr, dtor); + return _sys_pthread_funcs.f_pthread_key_create(keyptr, dtor); +} + +int pthread_key_delete(pthread_key_t key) +{ + if (override) { + lthread_key_delete((unsigned int) key); + return 0; + } + return _sys_pthread_funcs.f_pthread_key_delete(key); +} + + +int +pthread_mutex_init(pthread_mutex_t *mutex, const pthread_mutexattr_t *attr) +{ + if (override) + return lthread_mutex_init(NULL, + (struct lthread_mutex **)mutex, + (const struct lthread_mutexattr *)attr); + return _sys_pthread_funcs.f_pthread_mutex_init(mutex, attr); +} + +int pthread_mutex_lock(pthread_mutex_t *mutex) +{ + if (override) + return lthread_mutex_lock(*(struct lthread_mutex **)mutex); + return _sys_pthread_funcs.f_pthread_mutex_lock(mutex); +} + +int pthread_mutex_trylock(pthread_mutex_t *mutex) +{ + if (override) + return lthread_mutex_trylock(*(struct lthread_mutex **)mutex); + return _sys_pthread_funcs.f_pthread_mutex_trylock(mutex); +} + +int pthread_mutex_timedlock(pthread_mutex_t *mutex, const struct timespec *b) +{ + NOT_IMPLEMENTED; + return _sys_pthread_funcs.f_pthread_mutex_timedlock(mutex, b); +} + +int pthread_mutex_unlock(pthread_mutex_t *mutex) +{ + if (override) + return lthread_mutex_unlock(*(struct lthread_mutex **)mutex); + return _sys_pthread_funcs.f_pthread_mutex_unlock(mutex); +} + +int pthread_once(pthread_once_t *a, void (b) (void)) +{ + NOT_IMPLEMENTED; + return _sys_pthread_funcs.f_pthread_once(a, b); +} + +int pthread_rwlock_destroy(pthread_rwlock_t *a) +{ + NOT_IMPLEMENTED; + return _sys_pthread_funcs.f_pthread_rwlock_destroy(a); +} + +int pthread_rwlock_init(pthread_rwlock_t *a, const pthread_rwlockattr_t *b) +{ + NOT_IMPLEMENTED; + return _sys_pthread_funcs.f_pthread_rwlock_init(a, b); +} + +int pthread_rwlock_rdlock(pthread_rwlock_t *a) +{ + NOT_IMPLEMENTED; + return _sys_pthread_funcs.f_pthread_rwlock_rdlock(a); +} + +int pthread_rwlock_timedrdlock(pthread_rwlock_t *a, const struct timespec *b) +{ + NOT_IMPLEMENTED; + return _sys_pthread_funcs.f_pthread_rwlock_timedrdlock(a, b); +} + +int pthread_rwlock_timedwrlock(pthread_rwlock_t *a, const struct timespec *b) +{ + NOT_IMPLEMENTED; + return _sys_pthread_funcs.f_pthread_rwlock_timedwrlock(a, b); +} + +int pthread_rwlock_tryrdlock(pthread_rwlock_t *a) +{ + NOT_IMPLEMENTED; + return _sys_pthread_funcs.f_pthread_rwlock_tryrdlock(a); +} + +int pthread_rwlock_trywrlock(pthread_rwlock_t *a) +{ + NOT_IMPLEMENTED; + return _sys_pthread_funcs.f_pthread_rwlock_trywrlock(a); +} + +int pthread_rwlock_unlock(pthread_rwlock_t *a) +{ + NOT_IMPLEMENTED; + return _sys_pthread_funcs.f_pthread_rwlock_unlock(a); +} + +int pthread_rwlock_wrlock(pthread_rwlock_t *a) +{ + NOT_IMPLEMENTED; + return _sys_pthread_funcs.f_pthread_rwlock_wrlock(a); +} + +int pthread_yield(void) +{ + if (override) { + lthread_yield(); + return 0; + } + return _sys_pthread_funcs.f_pthread_yield(); + +} + +pthread_t pthread_self(void) +{ + if (override) + return (pthread_t) lthread_current(); + return _sys_pthread_funcs.f_pthread_self(); +} + +int pthread_setspecific(pthread_key_t key, const void *data) +{ + if (override) { + int rv = lthread_setspecific((unsigned int)key, data); + return rv; + } + return _sys_pthread_funcs.f_pthread_setspecific(key, data); +} + +int pthread_spin_init(pthread_spinlock_t *a, int b) +{ + NOT_IMPLEMENTED; + return _sys_pthread_funcs.f_pthread_spin_init(a, b); +} + +int pthread_spin_destroy(pthread_spinlock_t *a) +{ + NOT_IMPLEMENTED; + return _sys_pthread_funcs.f_pthread_spin_destroy(a); +} + +int pthread_spin_lock(pthread_spinlock_t *a) +{ + NOT_IMPLEMENTED; + return _sys_pthread_funcs.f_pthread_spin_lock(a); +} + +int pthread_spin_trylock(pthread_spinlock_t *a) +{ + NOT_IMPLEMENTED; + return _sys_pthread_funcs.f_pthread_spin_trylock(a); +} + +int pthread_spin_unlock(pthread_spinlock_t *a) +{ + NOT_IMPLEMENTED; + return _sys_pthread_funcs.f_pthread_spin_unlock(a); +} + +int pthread_cancel(pthread_t tid) +{ + if (override) { + lthread_cancel(*(struct lthread **)tid); + return 0; + } + return _sys_pthread_funcs.f_pthread_cancel(tid); +} + +int pthread_setcancelstate(int a, int *b) +{ + NOT_IMPLEMENTED; + return _sys_pthread_funcs.f_pthread_setcancelstate(a, b); +} + +int pthread_setcanceltype(int a, int *b) +{ + NOT_IMPLEMENTED; + return _sys_pthread_funcs.f_pthread_setcanceltype(a, b); +} + +void pthread_testcancel(void) +{ + NOT_IMPLEMENTED; + return _sys_pthread_funcs.f_pthread_testcancel(); +} + + +int pthread_getschedparam(pthread_t tid, int *a, struct sched_param *b) +{ + NOT_IMPLEMENTED; + return _sys_pthread_funcs.f_pthread_getschedparam(tid, a, b); +} + +int pthread_setschedparam(pthread_t a, int b, const struct sched_param *c) +{ + NOT_IMPLEMENTED; + return _sys_pthread_funcs.f_pthread_setschedparam(a, b, c); +} + + +int nanosleep(const struct timespec *req, struct timespec *rem) +{ + if (override) { + uint64_t ns = req->tv_sec * 1000000000 + req->tv_nsec; + + lthread_sleep(ns); + return 0; + } + return _sys_pthread_funcs.f_nanosleep(req, rem); +} + +int +pthread_setaffinity_np(pthread_t thread, size_t cpusetsize, + const cpu_set_t *cpuset) +{ + if (override) { + /* we only allow affinity with a single CPU */ + if (CPU_COUNT(cpuset) != 1) + return POSIX_ERRNO(EINVAL); + + /* we only allow the current thread to sets its own affinity */ + struct lthread *lt = (struct lthread *)thread; + + if (lthread_current() != lt) + return POSIX_ERRNO(EINVAL); + + /* determine the CPU being requested */ + int i; + + for (i = 0; i < LTHREAD_MAX_LCORES; i++) { + if (!CPU_ISSET(i, cpuset)) + continue; + break; + } + /* check requested core is allowed */ + if (i == LTHREAD_MAX_LCORES) + return POSIX_ERRNO(EINVAL); + + /* finally we can set affinity to the requested lcore */ + lthread_set_affinity(i); + return 0; + } + return _sys_pthread_funcs.f_pthread_setaffinity_np(thread, cpusetsize, + cpuset); +} diff --git a/examples/performance-thread/pthread_shim/pthread_shim.h b/examples/performance-thread/pthread_shim/pthread_shim.h new file mode 100644 index 00000000..78bbb5ac --- /dev/null +++ b/examples/performance-thread/pthread_shim/pthread_shim.h @@ -0,0 +1,113 @@ +/*- + * BSD LICENSE + * + * Copyright(c) 2015 Intel Corporation. All rights reserved. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * * Neither the name of Intel Corporation nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#ifndef _PTHREAD_SHIM_H_ +#define _PTHREAD_SHIM_H_ +#include <pthread.h> + +/* + * This pthread shim is an example that demonstrates how legacy code + * that makes use of POSIX pthread services can make use of lthreads + * with reduced porting effort. + * + * N.B. The example is not a complete implementation, only a subset of + * pthread APIs sufficient to demonstrate the principle of operation + * are implemented. + * + * In general pthread attribute objects do not have equivalent functions + * in lthreads, and are ignored. + * + * There is one exception and that is the use of attr to specify a + * core affinity in calls to pthread_create. + * + * The shim operates as follows:- + * + * On initialisation a constructor function uses dlsym to obtain and + * save the loaded address of the full set of pthread APIs that will + * be overridden. + * + * For each function there is a stub provided that will invoke either + * the genuine pthread library function saved saved by the constructor, + * or else the corresponding equivalent lthread function. + * + * The stub functions are implemented in pthread_shim.c + * + * The stub will take care of adapting parameters, and any police + * any constraints where lthread functionality differs. + * + * The initial thread must always be a pure lthread. + * + * The decision whether to invoke the real library function or the lthread + * function is controlled by a per pthread flag that can be switched + * on of off by the pthread_override_set() API described below. Typcially + * this should be done as the first action of the initial lthread. + * + * N.B In general it would be poor practice to revert to invoke a real + * pthread function when running as an lthread, since these may block and + * effectively stall the lthread scheduler. + * + */ + + +/* + * An exiting lthread must not terminate the pthread it is running in + * since this would mean terminating the lthread scheduler. + * We override pthread_exit() with a macro because it is typically declared with + * __attribute__((noreturn)) + */ +void pthread_exit_override(void *v); + +#define pthread_exit(v) do { \ + pthread_exit_override((v)); \ + return NULL; \ +} while (0) + +/* + * Enable/Disable pthread override + * state + * 0 disable + * 1 enable + */ +void pthread_override_set(int state); + + +/* + * Return pthread override state + * return + * 0 disable + * 1 enable + */ +int pthread_override_get(void); + + +#endif /* _PTHREAD_SHIM_H_ */ |