Am 26.03.2015 um 04:03 hat Fam Zheng geschrieben: > 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 <[email protected]> > --- > configure | 24 ++++++++++++++++++++++++ > 1 file changed, 24 insertions(+) > > diff --git a/configure b/configure > index 589798e..03ba305 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-numa enable tcmalloc support
Almost. :-) Kevin
