SPML/UCX: added synchronized flush on quiet - v4.0

oshmem/mca/atomic/ucx/atomic_ucx_cswap.c

@@ -45,6 +45,11 @@ int mca_atomic_ucx_cswap(shmem_ctx_t ctx,
                                      UCP_ATOMIC_FETCH_OP_CSWAP, cond, prev, size,
                                      rva, ucx_mkey->rkey,
                                      opal_common_ucx_empty_complete_cb);
+
+    if (OPAL_LIKELY(!UCS_PTR_IS_ERR(status_ptr))) {
+        mca_spml_ucx_remote_op_posted(ucx_ctx, pe);
+    }
+
     return opal_common_ucx_wait_request(status_ptr, ucx_ctx->ucp_worker,
                                         "ucp_atomic_fetch_nb");
 }

oshmem/mca/atomic/ucx/atomic_ucx_module.c

@@ -51,6 +51,11 @@ int mca_atomic_ucx_op(shmem_ctx_t ctx,
     status = ucp_atomic_post(ucx_ctx->ucp_peers[pe].ucp_conn,
                              op, value, size, rva,
                              ucx_mkey->rkey);
+
+    if (OPAL_LIKELY(UCS_OK == status)) {
+        mca_spml_ucx_remote_op_posted(ucx_ctx, pe);
+    }
+
     return ucx_status_to_oshmem(status);
 }
 

oshmem/mca/spml/ucx/spml_ucx.c

@@ -80,7 +80,8 @@ mca_spml_ucx_t mca_spml_ucx = {
     .num_disconnect         = 1,
     .heap_reg_nb            = 0,
     .enabled                = 0,
-    .get_mkey_slow          = NULL
+    .get_mkey_slow          = NULL,
+    .synchronized_quiet     = false
 };
 
 mca_spml_ucx_ctx_t mca_spml_ucx_ctx_default = {
@@ -216,6 +217,40 @@ static void dump_address(int pe, char *addr, size_t len)
 
 static char spml_ucx_transport_ids[1] = { 0 };
 
+int mca_spml_ucx_init_put_op_mask(mca_spml_ucx_ctx_t *ctx, size_t nprocs)
+{
+    int res;
+
+    if (mca_spml_ucx.synchronized_quiet) {
+        ctx->put_proc_indexes = malloc(nprocs * sizeof(*ctx->put_proc_indexes));
+        if (NULL == ctx->put_proc_indexes) {
+            return OSHMEM_ERR_OUT_OF_RESOURCE;
+        }
+
+        OBJ_CONSTRUCT(&ctx->put_op_bitmap, opal_bitmap_t);
+        res = opal_bitmap_init(&ctx->put_op_bitmap, nprocs);
+        if (OPAL_SUCCESS != res) {
+            free(ctx->put_proc_indexes);
+            ctx->put_proc_indexes = NULL;
+            return res;
+        }
+
+        ctx->put_proc_count = 0;
+    }
+
+    return OSHMEM_SUCCESS;
+}
+
+int mca_spml_ucx_clear_put_op_mask(mca_spml_ucx_ctx_t *ctx)
+{
+    if (mca_spml_ucx.synchronized_quiet && ctx->put_proc_indexes) {
+        OBJ_DESTRUCT(&ctx->put_op_bitmap);
+        free(ctx->put_proc_indexes);
+    }
+
+    return OSHMEM_SUCCESS;
+}
+
 int mca_spml_ucx_add_procs(ompi_proc_t** procs, size_t nprocs)
 {
     size_t i, j, n;
@@ -235,6 +270,11 @@ int mca_spml_ucx_add_procs(ompi_proc_t** procs, size_t nprocs)
         goto error;
     }
 
+    rc = mca_spml_ucx_init_put_op_mask(&mca_spml_ucx_ctx_default, nprocs);
+    if (OSHMEM_SUCCESS != rc) {
+        goto error;
+    }
+
     err = ucp_worker_get_address(mca_spml_ucx_ctx_default.ucp_worker, &wk_local_addr, &wk_addr_len);
     if (err != UCS_OK) {
         goto error;
@@ -297,6 +337,8 @@ int mca_spml_ucx_add_procs(ompi_proc_t** procs, size_t nprocs)
              free(mca_spml_ucx.remote_addrs_tbl[i]);
          }
     }
+
+    mca_spml_ucx_clear_put_op_mask(&mca_spml_ucx_ctx_default);
     if (mca_spml_ucx_ctx_default.ucp_peers)
         free(mca_spml_ucx_ctx_default.ucp_peers);
     if (mca_spml_ucx.remote_addrs_tbl)
@@ -583,6 +625,11 @@ static int mca_spml_ucx_ctx_create_common(long options, mca_spml_ucx_ctx_t **ucx
         goto error;
     }
 
+    rc = mca_spml_ucx_init_put_op_mask(ucx_ctx, nprocs);
+    if (OSHMEM_SUCCESS != rc) {
+        goto error2;
+    }
+
     for (i = 0; i < nprocs; i++) {
         ep_params.field_mask = UCP_EP_PARAM_FIELD_REMOTE_ADDRESS;
         ep_params.address    = (ucp_address_t *)(mca_spml_ucx.remote_addrs_tbl[i]);
@@ -621,6 +668,8 @@ static int mca_spml_ucx_ctx_create_common(long options, mca_spml_ucx_ctx_t **ucx
         }
     }
 
+    mca_spml_ucx_clear_put_op_mask(ucx_ctx);
+
     if (ucx_ctx->ucp_peers)
         free(ucx_ctx->ucp_peers);
 
@@ -715,6 +764,7 @@ int mca_spml_ucx_put(shmem_ctx_t ctx, void* dst_addr, size_t size, void* src_add
     void *rva;
     spml_ucx_mkey_t *ucx_mkey;
     mca_spml_ucx_ctx_t *ucx_ctx = (mca_spml_ucx_ctx_t *)ctx;
+    int res;
 #if HAVE_DECL_UCP_PUT_NB
     ucs_status_ptr_t request;
 #else
@@ -725,12 +775,18 @@ int mca_spml_ucx_put(shmem_ctx_t ctx, void* dst_addr, size_t size, void* src_add
 #if HAVE_DECL_UCP_PUT_NB
     request = ucp_put_nb(ucx_ctx->ucp_peers[dst].ucp_conn, src_addr, size,
                          (uint64_t)rva, ucx_mkey->rkey, opal_common_ucx_empty_complete_cb);
-    return opal_common_ucx_wait_request(request, ucx_ctx->ucp_worker, "ucp_put_nb");
+    res = opal_common_ucx_wait_request(request, ucx_ctx->ucp_worker, "ucp_put_nb");
 #else
     status = ucp_put(ucx_ctx->ucp_peers[dst].ucp_conn, src_addr, size,
                      (uint64_t)rva, ucx_mkey->rkey);
-    return ucx_status_to_oshmem(status);
+    res = ucx_status_to_oshmem(status);
 #endif
+
+    if (OPAL_LIKELY(OSHMEM_SUCCESS == res)) {
+        mca_spml_ucx_remote_op_posted(ucx_ctx, dst);
+    }
+
+    return res;
 }
 
 int mca_spml_ucx_put_nb(shmem_ctx_t ctx, void* dst_addr, size_t size, void* src_addr, int dst, void **handle)
@@ -744,6 +800,10 @@ int mca_spml_ucx_put_nb(shmem_ctx_t ctx, void* dst_addr, size_t size, void* src_
     status = ucp_put_nbi(ucx_ctx->ucp_peers[dst].ucp_conn, src_addr, size,
                      (uint64_t)rva, ucx_mkey->rkey);
 
+    if (OPAL_LIKELY(status >= 0)) {
+        mca_spml_ucx_remote_op_posted(ucx_ctx, dst);
+    }
+
     return ucx_status_to_oshmem_nb(status);
 }
 
@@ -767,9 +827,28 @@ int mca_spml_ucx_fence(shmem_ctx_t ctx)
 
 int mca_spml_ucx_quiet(shmem_ctx_t ctx)
 {
+    int flush_get_data;
     int ret;
+    unsigned i;
+    int idx;
     mca_spml_ucx_ctx_t *ucx_ctx = (mca_spml_ucx_ctx_t *)ctx;
 
+    if (mca_spml_ucx.synchronized_quiet) {
+        for (i = 0; i < ucx_ctx->put_proc_count; i++) {
+            idx = ucx_ctx->put_proc_indexes[i];
+            ret = mca_spml_ucx_get_nb(ctx,
+                                      ucx_ctx->ucp_peers[idx].mkeys->super.super.va_base,
+                                      sizeof(flush_get_data), &flush_get_data, idx, NULL);
+            if (OMPI_SUCCESS != ret) {
+                oshmem_shmem_abort(-1);
+                return ret;
+            }
+
+            opal_bitmap_clear_bit(&ucx_ctx->put_op_bitmap, idx);
+        }
+        ucx_ctx->put_proc_count = 0;
+    }
+
     opal_atomic_wmb();
 
     ret = opal_common_ucx_worker_flush(ucx_ctx->ucp_worker);

oshmem/mca/spml/ucx/spml_ucx.h

@@ -33,6 +33,7 @@
 
 #include "opal/class/opal_free_list.h"
 #include "opal/class/opal_list.h"
+#include "opal/class/opal_bitmap.h"
 
 #include "orte/runtime/orte_globals.h"
 #include "opal/mca/common/ucx/common_ucx.h"
@@ -70,6 +71,9 @@ struct mca_spml_ucx_ctx {
     ucp_worker_h             ucp_worker;
     ucp_peer_t              *ucp_peers;
     long                     options;
+    opal_bitmap_t            put_op_bitmap;
+    int                     *put_proc_indexes;
+    unsigned                 put_proc_count;
 };
 typedef struct mca_spml_ucx_ctx mca_spml_ucx_ctx_t;
 
@@ -104,7 +108,7 @@ struct mca_spml_ucx {
     mca_spml_ucx_ctx_t       *aux_ctx;
     pthread_spinlock_t       async_lock;
     int                      aux_refcnt;
-
+    bool                     synchronized_quiet;
 };
 typedef struct mca_spml_ucx mca_spml_ucx_t;
 
@@ -171,6 +175,9 @@ extern int spml_ucx_ctx_progress(void);
 extern int spml_ucx_progress_aux_ctx(void);
 void mca_spml_ucx_async_cb(int fd, short event, void *cbdata);
 
+int mca_spml_ucx_init_put_op_mask(mca_spml_ucx_ctx_t *ctx, size_t nprocs);
+int mca_spml_ucx_clear_put_op_mask(mca_spml_ucx_ctx_t *ctx);
+
 static inline void mca_spml_ucx_aux_lock(void)
 {
     if (mca_spml_ucx.async_progress) {
@@ -224,6 +231,16 @@ static inline int ucx_status_to_oshmem_nb(ucs_status_t status)
 #endif
 }
 
+static inline void mca_spml_ucx_remote_op_posted(mca_spml_ucx_ctx_t *ctx, int dst)
+{
+    if (OPAL_UNLIKELY(mca_spml_ucx.synchronized_quiet)) {
+        if (!opal_bitmap_is_set_bit(&ctx->put_op_bitmap, dst)) {
+            ctx->put_proc_indexes[ctx->put_proc_count++] = dst;
+            opal_bitmap_set_bit(&ctx->put_op_bitmap, dst);
+        }
+    }
+}
+
 #define MCA_SPML_UCX_CTXS_ARRAY_SIZE 64
 #define MCA_SPML_UCX_CTXS_ARRAY_INC 64
 

oshmem/mca/spml/ucx/spml_ucx_component.c

@@ -128,6 +128,10 @@ static int mca_spml_ucx_component_register(void)
                                     "Asynchronous progress tick granularity (in usec)",
                                     &mca_spml_ucx.async_tick);
 
+    mca_spml_ucx_param_register_bool("synchronized_quiet", 0,
+                                     "Use synchronized quiet on shmem_quiet or shmem_barrier_all operations",
+                                     &mca_spml_ucx.synchronized_quiet);
+
     opal_common_ucx_mca_var_register(&mca_spml_ucx_component.spmlm_version);
 
     return OSHMEM_SUCCESS;
@@ -329,6 +333,7 @@ static void _ctx_cleanup(mca_spml_ucx_ctx_t *ctx)
                                       mca_spml_ucx.num_disconnect,
                                       ctx->ucp_worker);
     free(del_procs);
+    mca_spml_ucx_clear_put_op_mask(ctx);
     free(ctx->ucp_peers);
 }