This way we send one big buffer instead of many small ones Signed-off-by: Orit Wasserman <owass...@redhat.com> --- savevm.c | 19 +++++++++++++++---- 1 file changed, 15 insertions(+), 4 deletions(-)
diff --git a/savevm.c b/savevm.c index b024354..9e8ddee 100644 --- a/savevm.c +++ b/savevm.c @@ -622,6 +622,18 @@ int qemu_fclose(QEMUFile *f) return ret; } +static void add_to_iovec(QEMUFile *f, const uint8_t *buf, int size) +{ + /* check for adjoint buffer and colasce them */ + if (f->iovcnt > 0 && buf == f->iov[f->iovcnt - 1].iov_base + + f->iov[f->iovcnt - 1].iov_len) { + f->iov[f->iovcnt - 1].iov_len += size; + } else { + f->iov[f->iovcnt].iov_base = (uint8_t *)buf; + f->iov[f->iovcnt++].iov_len = size; + } +} + void qemu_put_buffer_async(QEMUFile *f, const uint8_t *buf, int size) { if (f->last_error) { @@ -634,8 +646,7 @@ void qemu_put_buffer_async(QEMUFile *f, const uint8_t *buf, int size) abort(); } - f->iov[f->iovcnt].iov_base = (uint8_t *)buf; - f->iov[f->iovcnt++].iov_len = size; + add_to_iovec(f, buf, size); f->is_write = 1; f->bytes_xfer += size; @@ -690,8 +701,8 @@ void qemu_put_byte(QEMUFile *f, int v) f->buf[f->buf_index++] = v; f->is_write = 1; f->bytes_xfer++; - f->iov[f->iovcnt].iov_base = f->buf + (f->buf_index - 1); - f->iov[f->iovcnt++].iov_len = 1; + + add_to_iovec(f, f->buf + (f->buf_index - 1), 1); if (f->buf_index >= IO_BUF_SIZE || f->iovcnt >= MAX_IOV_SIZE) { qemu_fflush(f); -- 1.7.11.7