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