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7b01cb974f
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Alexandre Derumier 7b01cb974f configure: Add support for jemalloc 
This adds "--enable-jemalloc" and "--disable-jemalloc" to allow linking
to jemalloc memory allocator.

We have already tcmalloc support,
but it seem to not working well with a lot of iothreads/disks.

The main problem is that tcmalloc use a shared thread cache of 16MB
by default.
With more threads, this cache is shared, and some bad garbage collections
can occur if the cache is too low.

It's possible to tcmalloc cache increase it with a env var:
TCMALLOC_MAX_TOTAL_THREAD_CACHE_BYTES=256MB

With default 16MB, performances are  really bad with more than 2 disks.
Increasing to 256MB, it's helping but still have problem with 16 disks/iothreads.

Jemalloc don't have performance problem with default configuration.

Here the benchmark results in iops of 1 qemu vm randread 4K iodepth=32,
with rbd block backend (librbd is doing a lot of memory allocation),
1 iothread by disk

glibc malloc
------------

1 disk      29052
2 disks     55878
4 disks     127899
8 disks     240566
15 disks    269976

jemalloc
--------

1 disk      41278
2 disks     75781
4 disks     195351
8 disks     294241
15 disks    298199

tcmalloc 2.2.1 default 16M cache
--------------------------------

1 disk   37911
2 disks  67698
4 disks  41076
8 disks  43312
15 disks 37569

tcmalloc : 256M cache
---------------------------

1 disk     33914
2 disks    58839
4 disks    148205
8 disks    213298
15 disks   218383

Signed-off-by: Alexandre Derumier <aderumier@odiso.com>
Message-Id: <1434711418-20429-1-git-send-email-aderumier@odiso.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2015-09-09 15:34:55 +02:00
audio ossaudio: fix memory leak 2015-07-08 13:11:01 +02:00
backends hostmem: Fix qemu_opt_get_bool() crash in host_memory_backend_init() 2015-07-22 15:09:25 -03:00
block block/iscsi: validate block size returned from target 2015-09-07 18:14:03 +02:00
bsd-user linux-user: remove --enable-guest-base/--disable-guest-base 2015-08-24 11:14:17 -07:00
crypto crypto: fix built-in AES decrypt function 2015-07-27 12:22:01 +02:00
default-configs smbios: move smbios code into a common folder 2015-08-13 14:08:30 +03:00
disas disas/arm-a64: Add missing compiler attribute GCC_FMT_ATTR 2015-07-21 11:18:45 +01:00
docs AioContext: optimize clearing the EventNotifier 2015-07-22 12:41:40 +01:00
dtc@65cc4d2748
fpu
fsdev virtfs-proxy-helper: fail gracefully if socket path is too long 2015-06-16 20:32:29 +05:30
gdb-xml
hw vhost-scsi: fix wrong vhost-scsi firmware path 2015-09-09 15:34:55 +02:00
include cutils: Add qemu_strtoull() wrapper 2015-09-09 15:34:54 +02:00
libcacard libcacard: pkgconfig: tidy dependent libs 2015-06-23 19:57:28 +03:00
libdecnumber remove libdecnumber/dpd/decimal128Local.h 2015-06-23 19:57:27 +03:00
linux-headers linux-headers: Update to 4.2-rc1 2015-07-06 17:59:01 +02:00
linux-user linux-user: call rcu_(un)register_thread on pthread_(exit|create) 2015-09-09 15:34:54 +02:00
migration migration: Fix global state with Xen. 2015-08-03 16:13:23 +00:00
net net: Flush queued packets when guest resumes 2015-07-20 18:11:24 +01:00
pc-bios pseries: Update SLOF firmware image to qemu-slof-20150429 2015-07-07 17:44:49 +02:00
pixman@87eea99e44
po
qapi qapi/qmp-event.c: Don't manually include os-win32.h/os-posix.h 2015-08-19 16:29:53 +01:00
qga qga: fixed versions for guest bus types in qapi-schema 2015-07-21 14:36:06 -05:00
qobject Include qapi/qmp/qerror.h exactly where needed 2015-06-22 18:20:41 +02:00
qom tcg: synchronize cpu->exit_request and cpu->tcg_exit_req accesses 2015-09-09 15:34:53 +02:00
roms pseries: Update SLOF firmware image to qemu-slof-20150429 2015-07-07 17:44:49 +02:00
scripts add macro file for coccinelle 2015-09-09 15:34:55 +02:00
slirp qerror: Move #include out of qerror.h 2015-06-22 18:20:40 +02:00
stubs main-loop: introduce qemu_mutex_iothread_locked 2015-07-01 15:45:50 +02:00
target-alpha tcg: Remove tcg_gen_trunc_i64_i32 2015-08-24 11:10:54 -07:00
target-arm target-arm: Implement AArch64 TLBI operations on IPAs 2015-08-25 16:18:33 +01:00
target-cris tcg: Remove tcg_gen_trunc_i64_i32 2015-08-24 11:10:54 -07:00
target-i386 target-i386: Remove x86_cpu_compat_set_features() 2015-08-13 14:08:25 +03:00
target-lm32 cpu-exec: Purge all uses of ENV_GET_CPU() 2015-07-09 15:20:40 +02:00
target-m68k tcg: Remove tcg_gen_trunc_i64_i32 2015-08-24 11:10:54 -07:00
target-microblaze tcg: Remove tcg_gen_trunc_i64_i32 2015-08-24 11:10:54 -07:00
target-mips tcg: Remove tcg_gen_trunc_i64_i32 2015-08-24 11:10:54 -07:00
target-moxie cpu-exec: Purge all uses of ENV_GET_CPU() 2015-07-09 15:20:40 +02:00
target-openrisc tcg: Remove tcg_gen_trunc_i64_i32 2015-08-24 11:10:54 -07:00
target-ppc cpu-exec: Purge all uses of ENV_GET_CPU() 2015-07-09 15:20:40 +02:00
target-s390x Added generic panic handler qemu_system_guest_panicked() 2015-09-07 18:14:03 +02:00
target-sh4 tcg: Remove tcg_gen_trunc_i64_i32 2015-08-24 11:10:54 -07:00
target-sparc tcg: Remove tcg_gen_trunc_i64_i32 2015-08-24 11:10:54 -07:00
target-tricore tcg: Remove tcg_gen_trunc_i64_i32 2015-08-24 11:10:54 -07:00
target-unicore32 cpu-exec: Purge all uses of ENV_GET_CPU() 2015-07-09 15:20:40 +02:00
target-xtensa tcg: Remove tcg_gen_trunc_i64_i32 2015-08-24 11:10:54 -07:00
tcg s390: fix softmmu compilation 2015-08-28 16:05:24 +01:00
tests cutils: Add qemu_strtoull() wrapper 2015-09-09 15:34:54 +02:00
trace
ui vnc: fix memory corruption (CVE-2015-5225) 2015-08-26 17:54:33 +02:00
util cutils: Add qemu_strtoull() wrapper 2015-09-09 15:34:54 +02:00
.exrc
.gitignore gitignore: Ignore shader generated files 2015-07-27 22:44:47 +03:00
.gitmodules
.mailmap
.travis.yml
accel.c
aio-posix.c AioContext: optimize clearing the EventNotifier 2015-07-22 12:41:40 +01:00
aio-win32.c AioContext: optimize clearing the EventNotifier 2015-07-22 12:41:40 +01:00
arch_init.c smbios: move smbios code into a common folder 2015-08-13 14:08:30 +03:00
async.c AioContext: force event loop iteration using BH 2015-07-29 10:02:06 +01:00
balloon.c Include monitor/monitor.h exactly where needed 2015-06-22 18:20:41 +02:00
block.c block: Fix backing file child when modifying graph 2015-07-14 17:15:23 +02:00
blockdev-nbd.c Include monitor/monitor.h exactly where needed 2015-06-22 18:20:41 +02:00
blockdev.c throttle: refuse bps_max/iops_max without bps/iops 2015-08-05 12:53:48 +01:00
blockjob.c blockjob: add block_job_release function 2015-07-07 14:27:14 +01:00
bootdevice.c
bt-host.c
bt-vhci.c
Changelog
CODING_STYLE CODING_STYLE: update mixed declaration rules 2015-09-09 15:34:54 +02:00
configure configure: Add support for jemalloc 2015-09-09 15:34:55 +02:00
COPYING
COPYING.LIB
coroutine-gthread.c
coroutine-sigaltstack.c
coroutine-ucontext.c
coroutine-win32.c
cpu-exec.c tcg: signal-free qemu_cpu_kick 2015-09-09 15:34:54 +02:00
cpus.c tcg: signal-free qemu_cpu_kick 2015-09-09 15:34:54 +02:00
cputlb.c cputlb: Add functions for flushing TLB for a single MMU index 2015-08-25 16:18:33 +01:00
device_tree.c device_tree: Fix a typo 2015-07-27 22:44:47 +03:00
device-hotplug.c
disas.c disas: Defeature print_target_address 2015-08-14 23:40:32 +02:00
dma-helpers.c
dump.c Include qapi/qmp/qerror.h exactly where needed 2015-06-22 18:20:41 +02:00
exec.c remove qemu/tls.h 2015-09-09 15:34:53 +02:00
gdbstub.c use qemu_cpu_kick instead of cpu_exit or qemu_cpu_kick_thread 2015-09-09 15:34:54 +02:00
HACKING
hmp-commands.hx qmp/hmp: add rocker device support 2015-06-12 13:42:17 +01:00
hmp.c qmp: Add optional bool "unmap" to drive-mirror 2015-07-02 10:06:23 +01:00
hmp.h qmp/hmp: add rocker device support 2015-06-12 13:42:17 +01:00
iohandler.c iohandler: Use aio API 2015-09-07 18:14:03 +02:00
ioport.c
iothread.c rcu: actually register threads that have RCU read-side critical sections 2015-07-24 13:57:45 +02:00
kvm-all.c VFIO updates for 2.4-rc0 2015-07-07 09:22:40 +01:00
kvm-stub.c kvm: some fixes to kvm_resamplefds_allowed 2015-07-06 12:15:14 -06:00
LICENSE
main-loop.c iohandler: Use aio API 2015-09-07 18:14:03 +02:00
MAINTAINERS MAINTAINERS: Add ZynqMP to MAINTAINERS file 2015-08-25 15:45:07 +01:00
Makefile make: Clean build messages 2015-07-27 22:44:47 +03:00
Makefile.objs crypto: introduce new module for computing hash digests 2015-07-07 12:04:07 +02:00
Makefile.target Makefile.target: include top level build dir in vpath 2015-09-09 15:34:54 +02:00
memory_mapping.c memory_mapping: Rework cpu related includes 2015-06-26 16:00:50 +02:00
memory.c Merge memory_region_init_reservation() into memory_region_init_io() 2015-08-13 11:26:21 +01:00
module-common.c
monitor.c osdep.h: Remove qemu_printf 2015-08-19 16:29:53 +01:00
nbd.c
numa.c numa: Fix memory leak in numa_set_mem_node_id() 2015-07-15 16:57:50 -03:00
os-posix.c
os-win32.c
page_cache.c
qapi-schema.json qapi: add missing @ 2015-07-27 22:44:47 +03:00
qdev-monitor.c Include qapi/qmp/qerror.h exactly where needed 2015-06-22 18:20:41 +02:00
qdict-test-data.txt
qemu-bridge-helper.c
qemu-char.c qemu-char: Fix missed data on unix socket 2015-07-23 07:37:38 +02:00
qemu-coroutine-io.c
qemu-coroutine-lock.c
qemu-coroutine-sleep.c
qemu-coroutine.c
qemu-doc.texi qemu-doc.texi: Fix capitalization error in OS X build instructions 2015-08-28 11:44:53 +01:00
qemu-img-cmds.hx
qemu-img.c Include qapi/qmp/qerror.h exactly where needed 2015-06-22 18:20:41 +02:00
qemu-img.texi
qemu-io-cmds.c qerror: Move #include out of qerror.h 2015-06-22 18:20:40 +02:00
qemu-io.c qerror: Move #include out of qerror.h 2015-06-22 18:20:40 +02:00
qemu-log.c
qemu-nbd.c qemu-nbd: remove unnecessary qemu_notify_event() 2015-08-14 23:40:32 +02:00
qemu-nbd.texi
qemu-options-wrapper.h
qemu-options.h
qemu-options.hx qemu-doc: fix typos 2015-07-24 13:57:45 +02:00
qemu-seccomp.c
qemu-tech.texi qemu-doc: fix typos 2015-07-24 13:57:45 +02:00
qemu-timer.c qemu-timer: initialize "timers_done_ev" to set 2015-07-22 12:41:32 +01:00
qemu.nsi
qemu.sasl
qjson.c
qmp-commands.hx migration: Write documetation for events capabilites 2015-07-15 09:07:54 +02:00
qmp.c qmp: Add example usage of strto*l() qemu wrapper 2015-09-09 15:34:54 +02:00
qtest.c
README
rules.mak make: load only required dependency files. 2015-08-13 14:08:25 +03:00
softmmu_template.h exec: drop cpu_can_do_io, just read cpu->can_do_io 2015-08-14 23:40:32 +02:00
spice-qemu-char.c
tcg-runtime.c
tci.c tcg: implement real ext_i32_i64 and extu_i32_i64 ops 2015-08-24 11:10:54 -07:00
thread-pool.c
thunk.c linux-user: Allocate thunk size dynamically 2015-06-15 11:36:58 +03:00
tpm.c Include monitor/monitor.h exactly where needed 2015-06-22 18:20:41 +02:00
trace-events block/mirror: limit qiov to IOV_MAX elements 2015-08-06 04:41:09 -04:00
translate-all.c translate-all: remove obsolete comment about l1_map 2015-09-09 15:34:54 +02:00
translate-all.h
user-exec.c osdep.h: Remove qemu_printf 2015-08-19 16:29:53 +01:00
VERSION Open 2.5 development tree 2015-08-11 23:15:55 +01:00
version.rc
vl.c Added generic panic handler qemu_system_guest_panicked() 2015-09-07 18:14:03 +02:00
xen-common-stub.c
xen-common.c migration: Fix regression for xenfv and pc,accel=xen machine. 2015-08-03 16:13:40 +00:00
xen-hvm-stub.c
xen-hvm.c xen-220615, more SOB lines 2015-06-23 17:46:20 +01:00
xen-mapcache.c

README 

Read the documentation in qemu-doc.html or on http://wiki.qemu-project.org

- QEMU team