Sylvain Jeaugey
3c223c105a
Add network communication through another GPU connected with NVLink (PXN). Add aggregation of messages coming from different local GPUs through PXN and going to the same destination. Add new v5 plugin API with grouped receives and tags. Add compat for v4 plugins. Add naming of NCCL threads to help debugging. Fix NVLink detection and avoid data corruption when some NVLinks are down. Add support for Relaxed Ordering for IB. Add profiling and timing infrastructure.
309 wiersze
14 KiB
C++
309 wiersze
14 KiB
C++
/*************************************************************************
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* Copyright (c) 2015-2022, NVIDIA CORPORATION. All rights reserved.
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*
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* See LICENSE.txt for license information
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************************************************************************/
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#include "ibvwrap.h"
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#include <sys/types.h>
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#include <unistd.h>
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#include <dlfcn.h>
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#include "core.h"
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static enum { ibvUninitialized, ibvInitializing, ibvInitialized, ibvError } ibvState = ibvUninitialized;
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/*Function Pointers*/
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int (*ibv_internal_fork_init)(void);
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struct ibv_device** (*ibv_internal_get_device_list)(int *num_devices);
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void (*ibv_internal_free_device_list)(struct ibv_device **list);
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const char * (*ibv_internal_get_device_name)(struct ibv_device *device);
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struct ibv_context* (*ibv_internal_open_device)(struct ibv_device* device);
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int (*ibv_internal_close_device)(struct ibv_context *context);
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int (*ibv_internal_get_async_event)(struct ibv_context *context, struct ibv_async_event *event);
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void (*ibv_internal_ack_async_event)(struct ibv_async_event *event);
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int (*ibv_internal_query_device)(struct ibv_context *context, struct ibv_device_attr *device_attr);
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int (*ibv_internal_query_port)(struct ibv_context *context, uint8_t port_num, struct ibv_port_attr *port_attr);
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int (*ibv_internal_query_gid)(struct ibv_context *context, uint8_t port_num, int index, union ibv_gid *gid);
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int (*ibv_internal_query_qp)(struct ibv_qp *qp, struct ibv_qp_attr *attr, int attr_mask, struct ibv_qp_init_attr *init_attr);
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struct ibv_pd * (*ibv_internal_alloc_pd)(struct ibv_context *context);
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int (*ibv_internal_dealloc_pd)(struct ibv_pd *pd);
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struct ibv_mr * (*ibv_internal_reg_mr)(struct ibv_pd *pd, void *addr, size_t length, int access);
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struct ibv_mr * (*ibv_internal_reg_mr_iova2)(struct ibv_pd *pd, void *addr, size_t length, uint64_t iova, int access);
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int (*ibv_internal_dereg_mr)(struct ibv_mr *mr);
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struct ibv_cq * (*ibv_internal_create_cq)(struct ibv_context *context, int cqe, void *cq_context, struct ibv_comp_channel *channel, int comp_vector);
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int (*ibv_internal_destroy_cq)(struct ibv_cq *cq);
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struct ibv_qp * (*ibv_internal_create_qp)(struct ibv_pd *pd, struct ibv_qp_init_attr *qp_init_attr);
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int (*ibv_internal_modify_qp)(struct ibv_qp *qp, struct ibv_qp_attr *attr, int attr_mask);
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int (*ibv_internal_destroy_qp)(struct ibv_qp *qp);
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const char * (*ibv_internal_event_type_str)(enum ibv_event_type event);
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// IBVERBS Library versioning
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#define IBVERBS_VERSION "IBVERBS_1.1"
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ncclResult_t wrap_ibv_symbols(void) {
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if (ibvState == ibvInitialized)
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return ncclSuccess;
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if (ibvState == ibvError)
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return ncclSystemError;
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if (__sync_bool_compare_and_swap(&ibvState, ibvUninitialized, ibvInitializing) == false) {
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// Another thread raced in front of us. Wait for it to be done.
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while (ibvState == ibvInitializing) pthread_yield();
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return (ibvState == ibvInitialized) ? ncclSuccess : ncclSystemError;
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}
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static void* ibvhandle = NULL;
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void* tmp;
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void** cast;
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ibvhandle=dlopen("libibverbs.so", RTLD_NOW);
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if (!ibvhandle) {
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ibvhandle=dlopen("libibverbs.so.1", RTLD_NOW);
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if (!ibvhandle) {
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INFO(NCCL_INIT, "Failed to open libibverbs.so[.1]");
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goto teardown;
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}
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}
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#define LOAD_SYM(handle, symbol, funcptr) do { \
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cast = (void**)&funcptr; \
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tmp = dlvsym(handle, symbol, IBVERBS_VERSION); \
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if (tmp == NULL) { \
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WARN("dlvsym failed on %s - %s version %s", symbol, dlerror(), IBVERBS_VERSION); \
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goto teardown; \
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} \
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*cast = tmp; \
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} while (0)
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// Attempt to load a specific symbol version - fail silently
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#define LOAD_SYM_VERSION(handle, symbol, funcptr, version) do { \
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cast = (void**)&funcptr; \
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*cast = dlvsym(handle, symbol, version); \
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} while (0)
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LOAD_SYM(ibvhandle, "ibv_get_device_list", ibv_internal_get_device_list);
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LOAD_SYM(ibvhandle, "ibv_free_device_list", ibv_internal_free_device_list);
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LOAD_SYM(ibvhandle, "ibv_get_device_name", ibv_internal_get_device_name);
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LOAD_SYM(ibvhandle, "ibv_open_device", ibv_internal_open_device);
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LOAD_SYM(ibvhandle, "ibv_close_device", ibv_internal_close_device);
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LOAD_SYM(ibvhandle, "ibv_get_async_event", ibv_internal_get_async_event);
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LOAD_SYM(ibvhandle, "ibv_ack_async_event", ibv_internal_ack_async_event);
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LOAD_SYM(ibvhandle, "ibv_query_device", ibv_internal_query_device);
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LOAD_SYM(ibvhandle, "ibv_query_port", ibv_internal_query_port);
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LOAD_SYM(ibvhandle, "ibv_query_gid", ibv_internal_query_gid);
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LOAD_SYM(ibvhandle, "ibv_query_qp", ibv_internal_query_qp);
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LOAD_SYM(ibvhandle, "ibv_alloc_pd", ibv_internal_alloc_pd);
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LOAD_SYM(ibvhandle, "ibv_dealloc_pd", ibv_internal_dealloc_pd);
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LOAD_SYM(ibvhandle, "ibv_reg_mr", ibv_internal_reg_mr);
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// Cherry-pick the ibv_reg_mr_iova2 API from IBVERBS 1.8
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LOAD_SYM_VERSION(ibvhandle, "ibv_reg_mr_iova2", ibv_internal_reg_mr_iova2, "IBVERBS_1.8");
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LOAD_SYM(ibvhandle, "ibv_dereg_mr", ibv_internal_dereg_mr);
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LOAD_SYM(ibvhandle, "ibv_create_cq", ibv_internal_create_cq);
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LOAD_SYM(ibvhandle, "ibv_destroy_cq", ibv_internal_destroy_cq);
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LOAD_SYM(ibvhandle, "ibv_create_qp", ibv_internal_create_qp);
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LOAD_SYM(ibvhandle, "ibv_modify_qp", ibv_internal_modify_qp);
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LOAD_SYM(ibvhandle, "ibv_destroy_qp", ibv_internal_destroy_qp);
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LOAD_SYM(ibvhandle, "ibv_fork_init", ibv_internal_fork_init);
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LOAD_SYM(ibvhandle, "ibv_event_type_str", ibv_internal_event_type_str);
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ibvState = ibvInitialized;
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return ncclSuccess;
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teardown:
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ibv_internal_get_device_list = NULL;
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ibv_internal_free_device_list = NULL;
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ibv_internal_get_device_name = NULL;
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ibv_internal_open_device = NULL;
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ibv_internal_close_device = NULL;
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ibv_internal_get_async_event = NULL;
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ibv_internal_ack_async_event = NULL;
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ibv_internal_query_device = NULL;
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ibv_internal_query_port = NULL;
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ibv_internal_query_gid = NULL;
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ibv_internal_query_qp = NULL;
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ibv_internal_alloc_pd = NULL;
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ibv_internal_dealloc_pd = NULL;
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ibv_internal_reg_mr = NULL;
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ibv_internal_reg_mr_iova2 = NULL;
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ibv_internal_dereg_mr = NULL;
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ibv_internal_create_cq = NULL;
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ibv_internal_destroy_cq = NULL;
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ibv_internal_create_qp = NULL;
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ibv_internal_modify_qp = NULL;
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ibv_internal_destroy_qp = NULL;
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ibv_internal_fork_init = NULL;
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ibv_internal_event_type_str = NULL;
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if (ibvhandle != NULL) dlclose(ibvhandle);
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ibvState = ibvError;
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return ncclSystemError;
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}
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#define IBV_PTR_CHECK_ERRNO(name_internal, call, retval, error_retval, name) \
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if (name_internal == NULL) { \
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WARN("lib wrapper not initialized."); \
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return ncclInternalError; \
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} \
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retval = call; \
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if (retval == error_retval) { \
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WARN("Call to " name " failed with error %s", strerror(errno)); \
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return ncclSystemError; \
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} \
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return ncclSuccess;
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#define IBV_PTR_CHECK(name_internal, call, retval, error_retval, name) \
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if (name_internal == NULL) { \
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WARN("lib wrapper not initialized."); \
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return ncclInternalError; \
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} \
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retval = call; \
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if (retval == error_retval) { \
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WARN("Call to " name " failed"); \
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return ncclSystemError; \
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} \
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return ncclSuccess;
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#define IBV_INT_CHECK_RET_ERRNO(name_internal, call, success_retval, name) \
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if (name_internal == NULL) { \
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WARN("lib wrapper not initialized."); \
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return ncclInternalError; \
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} \
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int ret = call; \
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if (ret != success_retval) { \
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WARN("Call to " name " failed with error %s", strerror(ret)); \
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return ncclSystemError; \
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} \
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return ncclSuccess;
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#define IBV_INT_CHECK(name_internal, call, error_retval, name) \
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if (name_internal == NULL) { \
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WARN("lib wrapper not initialized."); \
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return ncclInternalError; \
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} \
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int ret = call; \
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if (ret == error_retval) { \
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WARN("Call to " name " failed"); \
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return ncclSystemError; \
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} \
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return ncclSuccess;
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#define IBV_PASSTHRU(name_internal, call) \
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if (name_internal == NULL) { \
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WARN("lib wrapper not initialized."); \
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return ncclInternalError; \
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} \
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call; \
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return ncclSuccess;
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ncclResult_t wrap_ibv_fork_init() {
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IBV_INT_CHECK(ibv_internal_fork_init, ibv_internal_fork_init(), -1, "ibv_fork_init");
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}
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ncclResult_t wrap_ibv_get_device_list(struct ibv_device ***ret, int *num_devices) {
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*ret = ibv_internal_get_device_list(num_devices);
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if (*ret == NULL) *num_devices = 0;
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return ncclSuccess;
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}
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ncclResult_t wrap_ibv_free_device_list(struct ibv_device **list) {
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IBV_PASSTHRU(ibv_internal_free_device_list, ibv_internal_free_device_list(list));
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}
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const char *wrap_ibv_get_device_name(struct ibv_device *device) {
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if (ibv_internal_get_device_name == NULL) {
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WARN("lib wrapper not initialized.");
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exit(-1);
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}
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return ibv_internal_get_device_name(device);
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}
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ncclResult_t wrap_ibv_open_device(struct ibv_context **ret, struct ibv_device *device) { /*returns 0 on success, -1 on failure*/
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IBV_PTR_CHECK(ibv_internal_open_device, ibv_internal_open_device(device), *ret, NULL, "ibv_open_device");
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}
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ncclResult_t wrap_ibv_close_device(struct ibv_context *context) { /*returns 0 on success, -1 on failure*/
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IBV_INT_CHECK(ibv_internal_close_device, ibv_internal_close_device(context), -1, "ibv_close_device");
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}
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ncclResult_t wrap_ibv_get_async_event(struct ibv_context *context, struct ibv_async_event *event) { /*returns 0 on success, and -1 on error*/
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IBV_INT_CHECK(ibv_internal_get_async_event, ibv_internal_get_async_event(context, event), -1, "ibv_get_async_event");
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}
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ncclResult_t wrap_ibv_ack_async_event(struct ibv_async_event *event) {
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IBV_PASSTHRU(ibv_internal_ack_async_event, ibv_internal_ack_async_event(event));
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}
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ncclResult_t wrap_ibv_query_device(struct ibv_context *context, struct ibv_device_attr *device_attr) { /*returns 0 on success, or the value of errno on failure (which indicates the failure reason)*/
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IBV_INT_CHECK_RET_ERRNO(ibv_internal_query_device, ibv_internal_query_device(context, device_attr), 0, "ibv_query_device");
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}
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ncclResult_t wrap_ibv_query_port(struct ibv_context *context, uint8_t port_num, struct ibv_port_attr *port_attr) { /*returns 0 on success, or the value of errno on failure (which indicates the failure reason)*/
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IBV_INT_CHECK_RET_ERRNO(ibv_internal_query_port, ibv_internal_query_port(context, port_num, port_attr), 0, "ibv_query_port");
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}
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ncclResult_t wrap_ibv_query_gid(struct ibv_context *context, uint8_t port_num, int index, union ibv_gid *gid) {
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IBV_INT_CHECK_RET_ERRNO(ibv_internal_query_gid, ibv_internal_query_gid(context, port_num, index, gid), 0, "ibv_query_gid");
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}
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ncclResult_t wrap_ibv_query_qp(struct ibv_qp *qp, struct ibv_qp_attr *attr, int attr_mask, struct ibv_qp_init_attr *init_attr) {
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IBV_INT_CHECK_RET_ERRNO(ibv_internal_query_qp, ibv_internal_query_qp(qp, attr, attr_mask, init_attr), 0, "ibv_query_qp");
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}
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ncclResult_t wrap_ibv_alloc_pd(struct ibv_pd **ret, struct ibv_context *context) {
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IBV_PTR_CHECK(ibv_internal_alloc_pd, ibv_internal_alloc_pd(context), *ret, NULL, "ibv_alloc_pd");
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}
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ncclResult_t wrap_ibv_dealloc_pd(struct ibv_pd *pd) { /*returns 0 on success, or the value of errno on failure (which indicates the failure reason)*/
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IBV_INT_CHECK_RET_ERRNO(ibv_internal_dealloc_pd, ibv_internal_dealloc_pd(pd), 0, "ibv_dealloc_pd");
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}
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ncclResult_t wrap_ibv_reg_mr(struct ibv_mr **ret, struct ibv_pd *pd, void *addr, size_t length, int access) {
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IBV_PTR_CHECK(ibv_internal_reg_mr, ibv_internal_reg_mr(pd, addr, length, access), *ret, NULL, "ibv_reg_mr");
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}
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struct ibv_mr * wrap_direct_ibv_reg_mr(struct ibv_pd *pd, void *addr, size_t length, int access) {
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if (ibv_internal_reg_mr == NULL) {
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WARN("lib wrapper not initialized.");
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return NULL;
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}
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return ibv_internal_reg_mr(pd, addr, length, access);
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}
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ncclResult_t wrap_ibv_reg_mr_iova2(struct ibv_mr **ret, struct ibv_pd *pd, void *addr, size_t length, uint64_t iova, int access) {
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if (ibv_internal_reg_mr_iova2 == NULL) {
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return ncclInternalError;
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}
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if (ret == NULL) { return ncclSuccess; } // Assume dummy call
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IBV_PTR_CHECK(ibv_internal_reg_mr_iova2, ibv_internal_reg_mr_iova2(pd, addr, length, iova, access), *ret, NULL, "ibv_reg_mr_iova2");
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}
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ncclResult_t wrap_ibv_dereg_mr(struct ibv_mr *mr) { /*returns 0 on success, or the value of errno on failure (which indicates the failure reason)*/
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IBV_INT_CHECK_RET_ERRNO(ibv_internal_dereg_mr, ibv_internal_dereg_mr(mr), 0, "ibv_dereg_mr");
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}
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ncclResult_t wrap_ibv_create_cq(struct ibv_cq **ret, struct ibv_context *context, int cqe, void *cq_context, struct ibv_comp_channel *channel, int comp_vector) {
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IBV_PTR_CHECK(ibv_internal_create_cq, ibv_internal_create_cq(context, cqe, cq_context, channel, comp_vector), *ret, NULL, "ibv_create_cq");
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}
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ncclResult_t wrap_ibv_destroy_cq(struct ibv_cq *cq) {
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IBV_INT_CHECK_RET_ERRNO(ibv_internal_destroy_cq, ibv_internal_destroy_cq(cq), 0, "ibv_destroy_cq");
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}
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ncclResult_t wrap_ibv_destroy_qp(struct ibv_qp *qp) {
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IBV_INT_CHECK_RET_ERRNO(ibv_internal_destroy_qp, ibv_internal_destroy_qp(qp), 0, "ibv_destroy_qp");
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}
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ncclResult_t wrap_ibv_create_qp(struct ibv_qp **ret, struct ibv_pd *pd, struct ibv_qp_init_attr *qp_init_attr) {
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IBV_PTR_CHECK(ibv_internal_create_qp, ibv_internal_create_qp(pd, qp_init_attr), *ret, NULL, "ibv_create_qp");
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}
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ncclResult_t wrap_ibv_modify_qp(struct ibv_qp *qp, struct ibv_qp_attr *attr, int attr_mask) { /*returns 0 on success, or the value of errno on failure (which indicates the failure reason)*/
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IBV_INT_CHECK_RET_ERRNO(ibv_internal_modify_qp, ibv_internal_modify_qp(qp, attr, attr_mask), 0, "ibv_modify_qp");
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}
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ncclResult_t wrap_ibv_event_type_str(char **ret, enum ibv_event_type event) {
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*ret = (char *) ibv_internal_event_type_str(event);
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return ncclSuccess;
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}
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