diff options
| author | Paolo Bonzini <pbonzini@redhat.com> | 2013-05-10 14:16:40 +0200 |
|---|---|---|
| committer | Anthony Liguori <aliguori@us.ibm.com> | 2013-05-13 09:52:06 -0500 |
| commit | 3556c233d931ad5ffa46a35cb25cfc057732ebb8 (patch) | |
| tree | bd7e58516cec0d8567112f1afef447ba58a44bca /configure | |
| parent | fa131d94a5c00c6bbea39358d4bca7bf98f6c1f5 (diff) | |
qom: allow turning cast debugging off
Cast debugging can have a substantial cost (20% or more). Instead of adding
special-cased "fast casts" in the hot paths, we can just disable it in
releases. The tracing facilities we just added make it easier to analyze
those problems that cast debugging would reveal.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Message-id: 1368188203-3407-7-git-send-email-pbonzini@redhat.com
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Diffstat (limited to 'configure')
| -rwxr-xr-x | configure | 9 |
1 files changed, 9 insertions, 0 deletions
@@ -220,6 +220,7 @@ blobs="yes" pkgversion="" pie="" zero_malloc="" +qom_cast_debug="yes" trace_backend="nop" trace_file="trace" spice="" @@ -688,6 +689,10 @@ for opt do ;; --enable-sdl) sdl="yes" ;; + --disable-qom-cast-debug) qom_cast_debug="no" + ;; + --enable-qom-cast-debug) qom_cast_debug="yes" + ;; --disable-virtfs) virtfs="no" ;; --enable-virtfs) virtfs="yes" @@ -3575,6 +3580,7 @@ echo "gcov enabled $gcov" echo "TPM support $tpm" echo "libssh2 support $libssh2" echo "TPM passthrough $tpm_passthrough" +echo "QOM debugging $qom_cast_debug" if test "$sdl_too_old" = "yes"; then echo "-> Your SDL version is too old - please upgrade to have SDL support" @@ -3909,6 +3915,9 @@ echo "CONFIG_UNAME_RELEASE=\"$uname_release\"" >> $config_host_mak if test "$zero_malloc" = "yes" ; then echo "CONFIG_ZERO_MALLOC=y" >> $config_host_mak fi +if test "$qom_cast_debug" = "yes" ; then + echo "CONFIG_QOM_CAST_DEBUG=y" >> $config_host_mak +fi if test "$rbd" = "yes" ; then echo "CONFIG_RBD=y" >> $config_host_mak fi |