From: Fam Zheng Date: Thu, 26 Mar 2015 11:03:12 +0800 Subject: [PATCH] configure: Add support for tcmalloc This adds "--enable-tcmalloc" and "--disable-tcmalloc" to allow linking to libtcmalloc from gperftools. tcmalloc is a malloc implementation that works well with threads and is fast, so it is good for performance. It is disabled by default, because the MALLOC_PERTURB_ flag we use in tests doesn't work with tcmalloc. However we can enable tcmalloc specific heap checker and profilers later. An IOPS gain can be observed with virtio-blk-dataplane, other parts of QEMU will directly benefit from it as well: ========================================================== glibc malloc ---------------------------------------------------------- rw bs iodepth bw iops latency read 4k 1 150 38511 24 ---------------------------------------------------------- ========================================================== tcmalloc ---------------------------------------------------------- rw bs iodepth bw iops latency read 4k 1 156 39969 23 ---------------------------------------------------------- Signed-off-by: Fam Zheng Message-Id: <1427338992-27057-1-git-send-email-famz@redhat.com> Signed-off-by: Paolo Bonzini (cherry picked from commit 2847b46958ab0bd604e1b3fcafba0f5ba4375833) --- configure | 24 ++++++++++++++++++++++++ 1 file changed, 24 insertions(+) diff --git a/configure b/configure index 6969f6f..75a4def 100755 --- a/configure +++ b/configure @@ -336,6 +336,7 @@ libssh2="" vhdx="" quorum="" numa="" +tcmalloc="no" # parse CC options first for opt do @@ -1134,6 +1135,10 @@ for opt do ;; --enable-numa) numa="yes" ;; + --disable-tcmalloc) tcmalloc="no" + ;; + --enable-tcmalloc) tcmalloc="yes" + ;; *) echo "ERROR: unknown option $opt" echo "Try '$0 --help' for more information" @@ -1407,6 +1412,8 @@ Advanced options (experts only): --enable-quorum enable quorum block filter support --disable-numa disable libnuma support --enable-numa enable libnuma support + --disable-tcmalloc disable tcmalloc support + --enable-tcmalloc enable tcmalloc support NOTE: The object files are built at the place where configure is launched EOF @@ -3331,6 +3338,22 @@ EOF fi ########################################## +# tcmalloc probe + +if test "$tcmalloc" = "yes" ; then + cat > $TMPC << EOF +#include +int main(void) { malloc(1); return 0; } +EOF + + if compile_prog "" "-ltcmalloc" ; then + LIBS="-ltcmalloc $LIBS" + else + feature_not_found "tcmalloc" "install gperftools devel" + fi +fi + +########################################## # signalfd probe signalfd="no" cat > $TMPC << EOF @@ -4441,6 +4464,7 @@ echo "lzo support $lzo" echo "snappy support $snappy" echo "bzip2 support $bzip2" echo "NUMA host support $numa" +echo "tcmalloc support $tcmalloc" if test "$sdl_too_old" = "yes"; then echo "-> Your SDL version is too old - please upgrade to have SDL support"