lguest: Enlarge virtio rings With big packets, 128 entries is too small. Guest -> Host 1GB TCP: Before: Seconds 9.86102 xmit 241989 recv 192014 timeout 231224 After: Seconds 8.96367 xmit 207004 recv 16992 timeout 205142 Signed-off-by: Rusty Russell --- Documentation/lguest/lguest.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff -r e6479adef826 Documentation/lguest/lguest.c --- a/Documentation/lguest/lguest.c Wed Jun 25 00:55:24 2008 +1000 +++ b/Documentation/lguest/lguest.c Wed Jun 25 01:21:54 2008 +1000 @@ -66,8 +66,8 @@ typedef uint8_t u8; #endif /* We can have up to 256 pages for devices. */ #define DEVICE_PAGES 256 -/* This will occupy 2 pages: it must be a power of 2. */ -#define VIRTQUEUE_NUM 128 +/* This will occupy 4 pages: it must be a power of 2. */ +#define VIRTQUEUE_NUM 512 /*L:120 verbose is both a global flag and a macro. The C preprocessor allows * this, and although I wouldn't recommend it, it works quite nicely here. */