static void
gasnete_coll_pami_allgavi(const gasnet_team_handle_t team,
                          void *dst, const void *src,
                          size_t nbytes, int flags GASNETE_THREAD_FARG)
{
    int i_am_leader = gasnete_coll_pami_images_barrier(team); /* XXX: over-synced for IN_NO and IN_MY */
    const gasnete_coll_threaddata_t * const td = GASNETE_COLL_MYTHREAD_NOALLOC;

    if (flags & GASNET_COLL_IN_ALLSYNC) {
        if (i_am_leader) gasnetc_fast_barrier();
        (void) gasnete_coll_pami_images_barrier(team);
    }

    GASNETE_FAST_UNALIGNED_MEMCPY(gasnete_coll_scale_ptr(team->pami.scratch_space,
                                                         td->my_local_image,
                                                         nbytes),
                                  src, nbytes);
    (void) gasnete_coll_pami_images_barrier(team);

    if (i_am_leader) {
        volatile unsigned int done = 0;
        pami_result_t rc;
        pami_xfer_t op;

        op = gasnete_op_template_allgavi; /* allgatherv_int */
        op.cookie = (void *)&done;
        op.algorithm = team->pami.allgavi_alg;
        op.cmd.xfer_allgatherv_int.sndbuf = team->pami.scratch_space;
        op.cmd.xfer_allgatherv_int.stypecount = nbytes * team->my_images;

        op.cmd.xfer_allgatherv_int.rcvbuf = dst;
        op.cmd.xfer_allgatherv_int.rtypecounts = team->pami.counts;
        op.cmd.xfer_allgatherv_int.rdispls = team->pami.displs;
        if (team->pami.prev_nbytes != nbytes) {
            int i;
            for (i = 0; i < team->total_ranks; ++i) {
                op.cmd.xfer_allgatherv_int.rtypecounts[i] = nbytes * team->all_images[i];
                op.cmd.xfer_allgatherv_int.rdispls[i] = nbytes * team->all_offset[i];
            }
            team->pami.prev_nbytes = nbytes;
        }

        GASNETC_PAMI_LOCK(gasnetc_context);
        rc = PAMI_Collective(gasnetc_context, &op);
        GASNETC_PAMI_UNLOCK(gasnetc_context);
        GASNETC_PAMI_CHECK(rc, "initiating blocking allgatherv_int");

        gasneti_polluntil(done);

        gasneti_assert(NULL == team->pami.tmp_addr);
        gasneti_sync_writes(); /* XXX: is this necessary? */
        team->pami.tmp_addr = dst; /* wakes pollers, below */
        (void) gasnete_coll_pami_images_barrier(team); /* matches instance below vvvv */
        team->pami.tmp_addr = NULL;
    } else {
        gasneti_waitwhile(NULL == team->pami.tmp_addr);
        GASNETE_FAST_UNALIGNED_MEMCPY(dst, team->pami.tmp_addr, nbytes * team->total_images);
        (void) gasnete_coll_pami_images_barrier(team); /* matches instance above ^^^^ */
    }
      
    if (flags & GASNET_COLL_OUT_ALLSYNC) {
        if (i_am_leader) gasnetc_fast_barrier();
        (void) gasnete_coll_pami_images_barrier(team);
    }
}
Esempio n. 2
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static void
gasnete_coll_pami_scattvi(const gasnet_team_handle_t team, void *dst,
                          gasnet_image_t srcimage, const void *src,
                          size_t nbytes, int flags GASNETI_THREAD_FARG)
{
    const int i_am_root = gasnete_coll_image_is_local(team, srcimage);
    int i_am_leader = gasnete_coll_pami_images_barrier(team); /* XXX: over-synced for IN_NO and IN_MY */
    const gasnete_coll_threaddata_t * const td = GASNETE_COLL_MYTHREAD_NOALLOC;

    if ((flags & GASNET_COLL_LOCAL) && i_am_root) {
        /* root thread must be leader for its node */
        i_am_leader = (srcimage == td->my_image);
    }

    if (i_am_leader) {
        volatile unsigned int done = 0;
        pami_result_t rc;
        pami_xfer_t op;

        if (flags & GASNET_COLL_IN_ALLSYNC) gasnetc_fast_barrier();

        op = gasnete_op_template_scattvi; /* scatterv_int */
        op.cookie = (void *)&done;
        op.algorithm = team->pami.scattvi_alg;
        op.cmd.xfer_scatterv_int.root = gasnetc_endpoint(GASNETE_COLL_REL2ACT(team,gasnete_coll_image_node(team, srcimage)));
        op.cmd.xfer_scatterv_int.rcvbuf = team->pami.scratch_space;
        op.cmd.xfer_scatterv_int.rtypecount = nbytes * team->my_images;

        if (i_am_root) {
            op.cmd.xfer_scatterv_int.sndbuf = (/*not-const*/ void *)src;
            op.cmd.xfer_scatterv_int.stypecounts = team->pami.counts;
            op.cmd.xfer_scatterv_int.sdispls = team->pami.displs;
            if (team->pami.prev_nbytes != nbytes) {
                int i;
                for (i = 0; i < team->total_ranks; ++i) {
                    op.cmd.xfer_scatterv_int.stypecounts[i] = nbytes * team->all_images[i];
                    op.cmd.xfer_scatterv_int.sdispls[i] = nbytes * team->all_offset[i];
                }
                team->pami.prev_nbytes = nbytes;
            }
        }

        GASNETC_PAMI_LOCK(gasnetc_context);
        rc = PAMI_Collective(gasnetc_context, &op);
        GASNETC_PAMI_UNLOCK(gasnetc_context);
        GASNETC_PAMI_CHECK(rc, "initiating blocking scatterv_int");

        gasneti_polluntil(done);

        gasneti_assert(NULL == team->pami.tmp_addr);
        gasneti_sync_writes();
        team->pami.tmp_addr = team->pami.scratch_space; /* wakes pollers, below */
    } else {
        gasneti_waitwhile(NULL == team->pami.tmp_addr);
    }

    GASNETI_MEMCPY               (dst,
                                  gasnete_coll_scale_ptr(team->pami.tmp_addr,
                                                         td->my_local_image,
                                                         nbytes),
                                  nbytes);
    (void) gasnete_coll_pami_images_barrier(team);

    if (i_am_leader) {
        team->pami.tmp_addr = NULL;
    }

    if (flags & GASNET_COLL_OUT_ALLSYNC) {
        if (i_am_leader) gasnetc_fast_barrier();
        (void) gasnete_coll_pami_images_barrier(team);
    }
}