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Avoiding read call in memif_rx_burst for poll mode #24

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Avoiding read call in memif_rx_burst for poll mode #24

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11 changes: 7 additions & 4 deletions extras/libmemif/src/main.c
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Original file line number Diff line number Diff line change
Expand Up @@ -2504,10 +2504,13 @@ memif_rx_burst (memif_conn_handle_t conn, uint16_t qid,
memif_buffer_t *b0;
*rx = 0;

uint64_t b;
ssize_t r = read (mq->int_fd, &b, sizeof (b));
if (EXPECT_FALSE ((r == -1) && (errno != EAGAIN)))
return memif_syscall_error_handler (errno);
if ((ring->flags & MEMIF_RING_FLAG_MASK_INT) == 0)
{
uint64_t b;
ssize_t r = read (mq->int_fd, &b, sizeof (b));
if (EXPECT_FALSE ((r == -1) && (errno != EAGAIN)))
return memif_syscall_error_handler (errno);
}

cur_slot = (c->args.is_master) ? mq->last_head : mq->last_tail;
last_slot = (c->args.is_master) ? ring->head : ring->tail;
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