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| author | Fam Zheng <famz@redhat.com> | 2015-03-26 11:03:12 +0800 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2015-04-28 22:14:11 +0200 |
| commit | 2847b46958ab0bd604e1b3fcafba0f5ba4375833 (patch) | |
| tree | 35718aed1d18f94ce9f33da940a623da7a3db99e /hw/intc/apic_common.c | |
| parent | 23820dbfc79d1c9dce090b4c555994f2bb6a69b3 (diff) | |
| download | focaccia-qemu-2847b46958ab0bd604e1b3fcafba0f5ba4375833.tar.gz focaccia-qemu-2847b46958ab0bd604e1b3fcafba0f5ba4375833.zip | |
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 <famz@redhat.com>
Message-Id: <1427338992-27057-1-git-send-email-famz@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'hw/intc/apic_common.c')
0 files changed, 0 insertions, 0 deletions