static void _XMP_refect_wait_tca(_XMP_array_t *adesc)
{
int array_dim = adesc->dim;
tcaHandle* h = (tcaHandle*)adesc->tca_handle;
for(int i=0;i<array_dim;i++){
_XMP_array_info_t *ai = &(adesc->info[i]);
if(ai->shadow_type == _XMP_N_SHADOW_NONE)
continue;
int lo_rank = ai->reflect_acc_sched->lo_rank;
int hi_rank = ai->reflect_acc_sched->hi_rank;
#if 0
if(lo_rank != -1)
printf("[%d] lo wait from %d\n", _XMP_world_rank, lo_rank);
if(hi_rank != -1)
printf("[%d] hi wait from %d\n", _XMP_world_rank, hi_rank);
#endif
if(lo_rank != -1)
tcaWaitDMARecvDesc(&h[lo_rank], adesc->wait_slot, adesc->wait_tag);
if(hi_rank != -1)
tcaWaitDMARecvDesc(&h[hi_rank], adesc->wait_slot, adesc->wait_tag);
}
}
static bool _XMP_tca_ring_buf_recv_nowait(tca_ring_buf_t *ring_buf, packet_t *packet)
{
psn_t local_recv_psn = ring_buf->psn_pairs[1]; //1: local_recv
//wait until (remote_send_psn > local_recv_psn) become true
volatile psn_t* remote_send_psn_p = &(ring_buf->psn_pairs[2]); //2: remote_send
if(*remote_send_psn_p <= local_recv_psn){
return false;
}
//copy recved data
int buf_pos = local_recv_psn % RING_SIZE;
*packet = ring_buf->recv_buffer[buf_pos];
//fprintf(stderr, "recv: psn=%ull, tag=%d, data=%d\n", local_recv_psn, *tag, *data);
//update local_recv_psn
ring_buf->psn_pairs[1] = ++local_recv_psn;
if(local_recv_psn - ring_buf->last_send_local_recv_psn >= (RING_SIZE/2)){
_XMP_tca_lock();
//send local psn pair
const int psn_wait_slot = _wait_slot_offset + RING_SIZE;
ring_buf->last_send_local_recv_psn = ring_buf->psn_pairs[1];
TCA_CHECK(tcaDescSet(ring_buf->psn_desc, _dmac_channel));
TCA_CHECK(tcaStartDMADesc(_dmac_channel));
TCA_CHECK(tcaWaitDMARecvDesc(&(ring_buf->local_psn_pairs_handle), psn_wait_slot, _psn_wait_tag));
TCA_CHECK(tcaWaitDMAC(_dmac_channel)); //important
_XMP_tca_unlock();
}
return true;
}
static void _XMP_tca_ring_buf_recv(tca_ring_buf_t *ring_buf, int *tag, int *data)
{
psn_t local_recv_psn = ring_buf->psn_pairs[1]; //1: local_recv
int buf_pos = local_recv_psn % RING_SIZE;
_XMP_tca_lock();
#ifdef _USE_NOTIFY_TO_WAIT_PACKET
//wait notify for recv_buf
const int buf_wait_slot = _wait_slot_offset + buf_pos;
TCA_CHECK(tcaWaitDMARecvDesc(&(ring_buf->remote_psn_pairs_handle), buf_wait_slot, _packet_wait_tag));
#else
//wait until (remote_send_psn > local_recv_psn) become true
volatile psn_t* remote_send_psn_p = &(ring_buf->psn_pairs[2]); //2: remote_send
while(*remote_send_psn_p <= local_recv_psn){
++spin_wait_count;
_mm_pause();
}
#endif
//copy recved data
*tag = ring_buf->recv_buffer[buf_pos].tag;
*data = ring_buf->recv_buffer[buf_pos].data;
//fprintf(stderr, "recv: psn=%ull, tag=%d, data=%d\n", local_recv_psn, *tag, *data);
//update local_recv_psn
ring_buf->psn_pairs[1] = ++local_recv_psn;
if(local_recv_psn - ring_buf->last_send_local_recv_psn >= (RING_SIZE/2)){
//send local psn pair
const int psn_wait_slot = _wait_slot_offset + RING_SIZE;
ring_buf->last_send_local_recv_psn = ring_buf->psn_pairs[1];
TCA_CHECK(tcaDescSet(ring_buf->psn_desc, _dmac_channel));
TCA_CHECK(tcaStartDMADesc(_dmac_channel));
TCA_CHECK(tcaWaitDMARecvDesc(&(ring_buf->local_psn_pairs_handle), psn_wait_slot, _psn_wait_tag));
TCA_CHECK(tcaWaitDMAC(_dmac_channel)); //important
}
//printf("psns: %llu, %llu, %llu, %llu\n", ring_buf->psn_pairs[0],ring_buf->psn_pairs[1],ring_buf->psn_pairs[2],ring_buf->psn_pairs[3]);
_XMP_tca_unlock();
}
static void _XMP_tca_ring_buf_send(tca_ring_buf_t *ring_buf, const int tag, const int data) //postの場合 tag=post_req, packet=post_tag
{
volatile psn_t *r_recv_psn = &(ring_buf->psn_pairs[3]);
const unsigned long long local_send_psn = ring_buf->psn_pairs[0]; //0: local_send
//fprintf(stderr,"send start (tag=%d, data=%d, psn=%llu)\n", tag, data, local_send_psn);
_XMP_tca_lock();
//相手のring bufferが空くまで待機
while(local_send_psn - *r_recv_psn >= RING_SIZE){
const int psn_wait_slot = _wait_slot_offset + RING_SIZE;
TCA_CHECK(tcaWaitDMARecvDesc(&(ring_buf->remote_psn_pairs_handle), psn_wait_slot, _psn_wait_tag));
}
const int buf_pos = local_send_psn % RING_SIZE;
const int buf_wait_slot = _wait_slot_offset + buf_pos;
//send_bufferに値の書き込み
ring_buf->send_buffer[buf_pos].tag = tag;
ring_buf->send_buffer[buf_pos].data = data;
//update local send psn
ring_buf->psn_pairs[0] = local_send_psn + 1;
ring_buf->last_send_local_recv_psn = ring_buf->psn_pairs[1];
// set desc
TCA_CHECK(tcaDescSet(ring_buf->buffer_desc[buf_pos], _dmac_channel));
// start dmac
TCA_CHECK(tcaStartDMADesc(_dmac_channel));
// wait put locally
TCA_CHECK(tcaWaitDMARecvDesc(&(ring_buf->local_send_buffer_handle), buf_wait_slot, _packet_wait_tag));
//wait dmac
TCA_CHECK(tcaWaitDMAC(_dmac_channel)); //important
//fprintf(stderr,"send end (tag=%d, data=%d, psn=%llu)\n", tag, data, local_send_psn);
_XMP_tca_unlock();
}