lguest: Enlarge virtio rings With big packets, 128 entries is a little small. Guest -> Host 1GB TCP: Before: 8.43625 seconds xmit 95640 recv 198266 timeout 49771 usec 1252 After: 8.01099 seconds xmit 49200 recv 102263 timeout 26014 usec 2118 Signed-off-by: Rusty Russell --- Documentation/lguest/lguest.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff -r c257fc13bce7 Documentation/lguest/lguest.c --- a/Documentation/lguest/lguest.c Mon Jul 14 16:48:29 2008 +1000 +++ b/Documentation/lguest/lguest.c Mon Jul 14 17:13:48 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 3 pages: it must be a power of 2. */ +#define VIRTQUEUE_NUM 256 /*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. */