Searched hist:ad523bca (Results 1 – 2 of 2) sorted by relevance
| /openbmc/qemu/include/qemu/ |
| H A D | iov.h | ad523bca Tue Dec 22 05:03:33 CST 2015 Paolo Bonzini <pbonzini@redhat.com> iov: avoid memcpy for "simple" iov_from_buf/iov_to_buf
memcpy can take a large amount of time for small reads and writes.
For virtio it is a common case that the first iovec can satisfy the
whole read or write. In that case, and if bytes is a constant to
avoid excessive growth of code, inline the first iteration
into the caller.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Message-id: 1450782213-14227-1-git-send-email-pbonzini@redhat.com
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
|
| /openbmc/qemu/util/ |
| H A D | iov.c | ad523bca Tue Dec 22 05:03:33 CST 2015 Paolo Bonzini <pbonzini@redhat.com> iov: avoid memcpy for "simple" iov_from_buf/iov_to_buf
memcpy can take a large amount of time for small reads and writes.
For virtio it is a common case that the first iovec can satisfy the
whole read or write. In that case, and if bytes is a constant to
avoid excessive growth of code, inline the first iteration
into the caller.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Message-id: 1450782213-14227-1-git-send-email-pbonzini@redhat.com
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
|