[Qemu-devel] [PATCH] tests/pxe: Use -nodefaults to speed up ppc64/ipv6 pxe test

[Thomas Huth]

SLOF is unfortunately quite slow when running with TCG, so
the pxe test is also performing rather slow here. By using
"-nodefaults" we can disable some devices (vscsi) that we
are not interested in here, so that SLOF does not have to
scan them during boot and thus starts up a little bit faster.
The ppc64 pxe-test now only takes 27 seconds on my laptop
instead of 33 seconds.
The "-nodefaults" flag seems to work fine for the x86 tests,
too, so it is added here unconditionally here (though there
is no speed-up on x86 by using this flag).

Suggested-by: Paolo Bonzini <address@hidden>
Signed-off-by: Thomas Huth <address@hidden>
---
 Note: This patch goes on top of my ipv6/ppc64 pxe-test
 patch that is currently queued in David's ppc-for-2.8
 branch.

 David: Since you did not send a pull request for the patch
 that introduces the ipv6/ppc64 test yet, feel free to
 squash this patch into that original patch in your
 queue if you prefer that instead of two separate patches.

 tests/pxe-test.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/tests/pxe-test.c b/tests/pxe-test.c
index 0bdb7a1..5d3ddbe 100644
--- a/tests/pxe-test.c
+++ b/tests/pxe-test.c
@@ -25,7 +25,7 @@ static void test_pxe_one(const char *params, bool ipv6)
 {
     char *args;
 
-    args = g_strdup_printf("-machine accel=tcg -boot order=n "
+    args = g_strdup_printf("-machine accel=tcg -nodefaults -boot order=n "
                            "-netdev user,id=" NETNAME ",tftp=./,bootfile=%s,"
                            "ipv4=%s,ipv6=%s %s", disk, ipv6 ? "off" : "on",
                            ipv6 ? "on" : "off", params);
@@ -48,7 +48,7 @@ static void test_pxe_virtio_pci(void)
 
 static void test_pxe_spapr_vlan(void)
 {
-    test_pxe_one("-vga none -device spapr-vlan,netdev=" NETNAME, true);
+    test_pxe_one("-device spapr-vlan,netdev=" NETNAME, true);
 }
 
 int main(int argc, char *argv[])
-- 
1.8.3.1