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Dmitry Konishchev f6a00aa150 qemu_img: is_not_zero() optimization 
I run qemu-img under profiler and realized, that most of CPU time is
consumed by is_not_zero() function. I had made a couple of optimizations
on it and got the following output for `time qemu-img convert -O qcow2
volume.qcow2 snapshot.qcow2`:

Original qemu-img:
real 0m56.159s
user 0m34.670s
sys  0m12.079s

Patched qemu-img:
real 0m34.805s
user 0m18.445s
sys  0m12.552s

Signed-off-by: Dmitry Konishchev <konishchev@gmail.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2011-05-18 14:39:15 +02:00
audio
Fix trivial "endianness bugs"
2011-04-03 21:42:57 +02:00
block
qed: Periodically flush and clear need check bit
2011-05-18 14:38:46 +02:00
bsd-user
Fix spelling in comments (intruction -> instruction)
2011-05-08 10:59:15 +01:00
darwin-user
Fix typos in comments (accross -> across)
2011-05-08 10:02:16 +01:00
default-configs
unicore32: necessary modifications for other files to support unicore32
2011-04-12 18:49:05 +00:00
docs
docs/tracing.txt: minor documentation fixes
2011-04-26 13:14:49 +01:00
fpu
softfloat-native: add float*_is_any_nan() functions
2011-04-25 11:18:33 +02:00
fsdev
virtio-9p: move 9p files around
2011-04-27 08:24:37 -07:00
gdb-xml
…
hw
ahci: Fix crashes on duplicate BH registration
2011-05-18 14:38:46 +02:00
libcacard
libcacard: add correct subdirectory dependencies
2011-05-08 11:44:47 +01:00
linux-user
linux-user: Replace deprecated function
2011-05-08 10:59:21 +01:00
net
Use qemu-common.h or qemu-timer.h in place of sysemu.h
2011-04-15 18:25:44 +00:00
pc-bios
PXE: Refresh all PXE ROMs from the ipxe submodule
2011-04-18 11:46:41 -06:00
QMP
spice: connection events.
2010-12-09 14:23:24 +01:00
roms
Revert SeaBIOS change due to overzealous commit -a
2011-04-13 08:16:53 -05:00
scripts
trace: [ust] fix generation of 'trace.c' on events without args
2011-04-26 13:14:49 +01:00
slirp
add a service to reap zombies, use it in SLIRP
2011-03-29 08:14:11 -05:00
sysconfigs/target
…
target-alpha
Remove unused function parameter from cpu_restore_state
2011-04-20 10:37:03 +02:00
target-arm
target-arm: Fix VMLA, VMLS, VNMLS, VNMLA handling of NaNs
2011-05-15 00:22:57 +02:00
target-cris
Merge remote-tracking branch 'stefanha/trivial-patches' into staging
2011-05-12 08:08:12 -05:00
target-i386
irq: Privatize CPU_INTERRUPT_NMI.
2011-05-08 16:55:24 +00:00
target-lm32
target-lm32: Remove unused local variables
2011-05-15 00:27:59 +02:00
target-m68k
Fix typos in comments and code (occured -> occurred and related)
2011-05-08 10:02:18 +01:00
target-microblaze
Merge remote-tracking branch 'stefanha/trivial-patches' into staging
2011-05-12 08:08:12 -05:00
target-mips
target-mips: Fix warning caused by unused local variable
2011-05-15 01:00:20 +02:00
target-ppc
Merge branch 'ppc-next' of git://repo.or.cz/qemu/agraf
2011-05-14 16:54:59 +02:00
target-s390x
Remove unused function parameter from cpu_restore_state
2011-04-20 10:37:03 +02:00
target-sh4
Remove unused function parameter from cpu_restore_state
2011-04-20 10:37:03 +02:00
target-sparc
sparc64: fix incorrect BPcc target sign extension
2011-05-14 07:30:31 +00:00
target-unicore32
Remove unused function parameters from gen_pc_load and rename the function
2011-04-20 10:33:59 +02:00
tcg
Fix typos in comments (accross -> across)
2011-05-08 10:02:16 +01:00
tests
Fix spelling in comments (intruction -> instruction)
2011-05-08 10:59:15 +01:00
ui
set $SDL_VIDEODRIVER=x11 on Linux to prevent sudo kvm from fighting for video card
2011-05-15 01:05:26 +02:00
.gitignore
Makefile: Clean up after "make pdf"
2011-04-16 12:24:28 +01:00
.gitmodules
Add ipxe submodule
2011-04-08 13:03:34 -06:00
a.out.h
…
acl.c
Remove unused sysemu.h include directives
2011-04-15 18:25:41 +00:00
acl.h
…
aes.c
…
aes.h
…
aio.c
…
alpha-dis.c
*-dis: Replace fprintf_ftype by fprintf_function (format checking)
2010-12-04 20:50:30 +00:00
alpha.ld
…
arch_init.c
Introduce -machine command option.
2011-05-08 10:09:59 +02:00
arch_init.h
Introduce -machine command option.
2011-05-08 10:09:59 +02:00
arm-dis.c
arm-dis: Include opcode hex when doing disassembly
2011-01-12 15:10:47 +01:00
arm-semi.c
Remove unused sysemu.h include directives
2011-04-15 18:25:41 +00:00
arm.ld
…
async.c
…
balloon.c
Remove unused sysemu.h include directives
2011-04-15 18:25:41 +00:00
balloon.h
…
bitmap.c
bitmap: add a generic bitmap and bitops library
2011-02-23 16:28:29 -06:00
bitmap.h
bitmap: add a generic bitmap and bitops library
2011-02-23 16:28:29 -06:00
bitops.c
bitmap: add a generic bitmap and bitops library
2011-02-23 16:28:29 -06:00
bitops.h
bitops: fix error on OpenBSD and mingw32
2011-02-25 17:21:22 +00:00
block_int.h
Add flag to indicate external users to block device
2011-02-07 12:51:19 +01:00
block-migration.c
Improve accuracy of block migration bandwidth calculation
2011-04-27 14:36:57 +02:00
block-migration.h
…
block.c
Fix typos in comments and code (occured -> occurred and related)
2011-05-08 10:02:18 +01:00
block.h
Do not delete BlockDriverState when deleting the drive
2011-04-07 13:51:47 +02:00
blockdev.c
Do not delete BlockDriverState when deleting the drive
2011-04-07 13:51:47 +02:00
blockdev.h
blockdev: add refcount to DriveInfo
2011-02-07 12:51:19 +01:00
bswap.h
bswap.h: add cpu_to_be64wu()
2011-01-10 10:55:10 +01:00
bt-host.c
Remove unused sysemu.h include directives
2011-04-15 18:25:41 +00:00
bt-host.h
…
bt-vhci.c
Remove unused sysemu.h include directives
2011-04-15 18:25:41 +00:00
buffered_file.c
Remove unused sysemu.h include directives
2011-04-15 18:25:41 +00:00
buffered_file.h
…
cache-utils.c
…
cache-utils.h
Delete useless 'extern' qualifiers for functions
2011-01-23 16:21:20 +00:00
Changelog
Fix typos in comments (dependancy -> dependency)
2011-05-08 10:02:16 +01:00
check-qdict.c
check-qdict: Fix possible crash
2011-02-20 18:45:09 +01:00
check-qfloat.c
…
check-qint.c
…
check-qjson.c
…
check-qlist.c
…
check-qstring.c
…
cmd.c
…
cmd.h
Delete useless 'extern' qualifiers for functions
2011-01-23 16:21:20 +00:00
CODING_STYLE
checkpatch: adjust to QEMUisms
2011-01-20 20:58:56 +00:00
compatfd.c
Use sigwait instead of sigwaitinfo.
2011-02-25 20:16:26 +00:00
compatfd.h
…
config.h
…
configure
configure: List available targets in --help output
2011-05-15 01:02:00 +02:00
console.c
Consolidate DisplaySurface allocation in qemu_alloc_display()
2011-03-22 08:39:11 -05:00
console.h
Make VNC support optional
2011-03-22 08:39:12 -05:00
COPYING
…
COPYING.LIB
…
cpu-all.h
irq: Privatize CPU_INTERRUPT_NMI.
2011-05-08 16:55:24 +00:00
cpu-common.h
Introduce qemu_put_ram_ptr
2011-05-08 10:10:01 +02:00
cpu-defs.h
Expose thread_id in info cpus
2011-03-16 17:11:07 -03:00
cpu-exec.c
Merge remote-tracking branch 'stefanha/trivial-patches' into staging
2011-05-12 08:08:12 -05:00
cpus.c
qemu_next_deadline should not consider host-time timers
2011-04-15 09:27:56 +02:00
cpus.h
Move CPU related functions to cpus.h
2011-04-15 20:14:52 +00:00
cris-dis.c
cris: Support disassembly of crisv10
2011-01-10 22:31:09 +01:00
cursor_hidden.xpm
…
cursor_left_ptr.xpm
…
cursor.c
…
cutils.c
QCOW2: bug fix - read base image beyond its size
2011-02-10 13:23:44 +01:00
def-helper.h
…
device_tree.c
Remove unused sysemu.h include directives
2011-04-15 18:25:41 +00:00
device_tree.h
Allow qemu_devtree_setprop() to take arbitrary values
2011-04-01 18:34:54 +02:00
dis-asm.h
Delete useless 'extern' qualifiers for functions
2011-01-23 16:21:20 +00:00
disas.c
Replace cpu_physical_memory_rw were possible
2011-04-12 21:51:50 +02:00
disas.h
…
dma-helpers.c
…
dma.h
…
dyngen-exec.h
…
elf.h
unicore32: necessary modifications for other files to support unicore32
2011-04-12 18:49:05 +00:00
envlist.c
…
envlist.h
Delete useless 'extern' qualifiers for functions
2011-01-23 16:21:20 +00:00
exec-all.h
Remove unused function parameter from cpu_restore_state
2011-04-20 10:37:03 +02:00
exec.c
Introduce qemu_put_ram_ptr
2011-05-08 10:10:01 +02:00
gdbstub.c
gdbstub: Catch and report more vmstop reasons
2011-04-03 23:57:39 +02:00
gdbstub.h
Add scripts directory
2011-01-20 20:54:21 +00:00
gen-icount.h
Fix conversions from pointer to tcg_target_long
2011-04-10 00:45:16 +02:00
HACKING
HACKING: Update status of format checking
2011-02-25 16:31:05 -06:00
hmp-commands.hx
hmp-commands.hx: fix badly merged client_migrate_info command
2011-03-10 16:12:21 -06:00
host-utils.c
…
host-utils.h
…
hpet.h
…
hppa-dis.c
Fix typo in comment (relevent -> relevant)
2011-05-08 10:02:18 +01:00
hppa.ld
…
i386-dis.c
…
i386.ld
…
ia64-dis.c
…
ia64.ld
…
input.c
event: trivial coding style fixes
2011-04-09 10:56:17 +01:00
iohandler.c
add a service to reap zombies, use it in SLIRP
2011-03-29 08:14:11 -05:00
ioport-user.c
…
ioport.c
ioport: Improve error output
2011-03-06 21:01:32 +01:00
ioport.h
Type-safe ioport callbacks
2010-11-21 09:16:57 -06:00
iorange.h
Type-safe ioport callbacks
2010-11-21 09:16:57 -06:00
iov.c
…
iov.h
…
json-lexer.c
json-lexer: fix conflict with mingw32 ERROR definition
2011-04-15 18:25:38 +00:00
json-lexer.h
…
json-parser.c
…
json-parser.h
…
json-streamer.c
…
json-streamer.h
…
kvm-all.c
kvm: ppc: warn user on PAGE_SIZE mismatch
2011-05-09 22:31:38 +02:00
kvm-stub.c
Remove unused sysemu.h include directives
2011-04-15 18:25:41 +00:00
kvm.h
kvm: x86: Push kvm_arch_debug to kvm_arch_handle_exit
2011-03-16 17:11:06 -03:00
libfdt_env.h
…
LICENSE
…
linux-aio.c
…
m68k-dis.c
*-dis: Replace fprintf_ftype by fprintf_function (format checking)
2010-12-04 20:50:30 +00:00
m68k-semi.c
…
m68k.ld
…
MAINTAINERS
MAINTAINERS: add Milkymist board
2011-04-04 10:26:54 +02:00
Makefile
libcacard: add correct subdirectory dependencies
2011-05-08 11:44:47 +01:00
Makefile.dis
…
Makefile.hw
…
Makefile.objs
libcacard: add correct subdirectory dependencies
2011-05-08 11:44:47 +01:00
Makefile.target
xen: Introduce the Xen mapcache
2011-05-08 10:10:01 +02:00
Makefile.user
…
microblaze-dis.c
*-dis: Replace fprintf_ftype by fprintf_function (format checking)
2010-12-04 20:50:30 +00:00
migration-exec.c
Remove unused sysemu.h include directives
2011-04-15 18:25:41 +00:00
migration-fd.c
Remove unused sysemu.h include directives
2011-04-15 18:25:41 +00:00
migration-tcp.c
Remove unused sysemu.h include directives
2011-04-15 18:25:41 +00:00
migration-unix.c
Remove unused sysemu.h include directives
2011-04-15 18:25:41 +00:00
migration.c
Improve vm_stop reason declarations
2011-02-14 12:39:46 -02:00
migration.h
migration: move some declarations to migration.h
2011-04-15 20:14:54 +00:00
mips-dis.c
*-dis: Replace fprintf_ftype by fprintf_function (format checking)
2010-12-04 20:50:30 +00:00
mips.ld
…
module.c
…
module.h
…
monitor.c
monitor: add PPC BookE SPRs
2011-05-09 22:31:37 +02:00
monitor.h
spice: connection events.
2010-12-09 14:23:24 +01:00
nbd.c
NBD: Use qemu_socket functions to open TCP and UNIX sockets
2011-04-07 13:51:48 +02:00
nbd.h
NBD: Use qemu_socket functions to open TCP and UNIX sockets
2011-04-07 13:51:48 +02:00
net.c
Remove unused sysemu.h include directives
2011-04-15 18:25:41 +00:00
net.h
Add bootindex parameter to net/block/fd device
2010-12-11 21:32:46 +00:00
notify.c
…
notify.h
…
os-posix.c
add a service to reap zombies, use it in SLIRP
2011-03-29 08:14:11 -05:00
os-win32.c
Expose thread_id in info cpus
2011-03-16 17:11:07 -03:00
osdep.c
Remove unused sysemu.h include directives
2011-04-15 18:25:41 +00:00
osdep.h
Merge remote branch 'qemu-kvm/uq/master' into staging
2011-03-21 17:42:20 -05:00
oslib-posix.c
virtio-9p: fix build on !CONFIG_UTIMENSAT
2010-12-02 16:08:40 -08:00
oslib-win32.c
w32: Remove implementation of function ffs
2011-02-20 20:18:21 +00:00
path.c
user: speed up init_paths a bit
2011-02-09 10:33:54 +02:00
pci-ids.txt
…
pflib.c
…
pflib.h
…
poison.h
irq: Privatize CPU_INTERRUPT_NMI.
2011-05-08 16:55:24 +00:00
posix-aio-compat.c
posix-aio-compat: Fix idle_threads counter
2011-05-18 14:38:45 +02:00
ppc64.ld
…
ppc-dis.c
…
ppc.ld
…
qbool.c
…
qbool.h
…
qdict-test-data.txt
…
qdict.c
…
qdict.h
…
qemu_socket.h
net: remove parse_host_src_port() function
2011-03-06 20:06:50 +01:00
qemu-aio.h
…
qemu-barrier.h
…
qemu-char.c
char: Detect chardev release by NULL handlers as well as NULL opaque
2011-04-28 11:11:04 +05:30
qemu-char.h
char: Allow devices to use a single multiplexed chardev.
2011-04-28 11:03:07 +05:30
qemu-common.h
Add documentation for qemu_progress_{init,print}()
2011-05-18 14:38:45 +02:00
qemu-config.c
Introduce -machine command option.
2011-05-08 10:09:59 +02:00
qemu-config.h
…
qemu-doc.texi
doc: Add explanation that -alt-grab and -ctrl-grab affect special keys
2011-05-15 00:13:48 +02:00
qemu-error.c
Remove unused sysemu.h include directives
2011-04-15 18:25:41 +00:00
qemu-error.h
…
qemu-img-cmds.hx
qemu-img: Initial progress printing support
2011-04-07 13:51:47 +02:00
qemu-img.c
qemu_img: is_not_zero() optimization
2011-05-18 14:39:15 +02:00
qemu-img.texi
Documentation: Add qemu-img check/rebase
2011-01-24 16:41:49 +01:00
qemu-io.c
qemu-io: Fix discard command
2011-01-31 10:03:00 +01:00
qemu-lock.h
qemu-lock.h: Remove non-pthreads spinlock implementations
2011-02-20 15:20:06 +01:00
qemu-log.h
…
qemu-malloc.c
Add missing tracing to qemu_mallocz()
2010-12-14 15:44:21 +01:00
qemu-nbd.c
Remove NULL checks for bdrv_new return value
2010-12-17 16:11:03 +01:00
qemu-nbd.texi
…
qemu-objects.h
…
qemu-option.c
qemu-option: Fix parse_option_parameters() documentation typo
2010-12-14 15:44:21 +01:00
qemu-option.h
…
qemu-options.h
…
qemu-options.hx
doc: Add explanation that -alt-grab and -ctrl-grab affect special keys
2011-05-15 00:13:48 +02:00
qemu-os-posix.h
virtio-9p: fix build on !CONFIG_UTIMENSAT
2010-12-02 16:08:40 -08:00
qemu-os-win32.h
w32: Fix missing declaration of ffs()
2011-05-15 12:34:39 +02:00
qemu-progress.c
Add documentation for qemu_progress_{init,print}()
2011-05-18 14:38:45 +02:00
qemu-queue.h
…
qemu-sockets.c
Set errno=ENOTSUP for attempts to use UNIX sockets on Windows platforms
2011-04-07 13:51:48 +02:00
qemu-tech.texi
qemu-tech: Spelling fixes
2011-01-09 20:59:53 +00:00
qemu-thread-posix.c
qemu-thread: delete unused functions
2011-03-19 08:30:28 +00:00
qemu-thread-posix.h
add Win32 IPI service
2011-03-13 14:44:22 +00:00
qemu-thread-win32.c
w32: Add missing functions qemu_mutex_destroy, qemu_cond_destroy
2011-03-19 08:29:35 +00:00
qemu-thread-win32.h
add win32 qemu-thread implementation
2011-03-13 14:44:21 +00:00
qemu-thread.h
qemu-thread.h: include inttypes.h
2011-04-01 19:07:48 -05:00
qemu-timer-common.c
Add OpenBSD to ifdef list since it has CLOCK_MONOTONIC.
2010-12-21 19:44:42 +00:00
qemu-timer.c
qemu-timer: Fix timers for w32
2011-04-27 13:30:18 +02:00
qemu-timer.h
qemu-timer: Remove unneeded include statement (w32)
2011-04-27 13:30:18 +02:00
qemu-tool.c
qemu-tool: Stub out qemu-timer functions
2011-05-18 14:38:46 +02:00
qemu-x509.h
…
qemu.sasl
…
qerror.c
qerror: Add QERR_UNKNOWN_BLOCK_FORMAT_FEATURE
2011-02-10 13:23:44 +01:00
qerror.h
Make VNC support optional
2011-03-22 08:39:12 -05:00
qfloat.c
…
qfloat.h
…
qint.c
…
qint.h
…
qjson.c
…
qjson.h
…
qlist.c
…
qlist.h
…
qmp-commands.hx
qmp-commands.hx: Clean up mess of client_migrate_info
2011-03-22 08:39:12 -05:00
qobject.h
…
qstring.c
…
qstring.h
…
range.h
…
readline.c
…
readline.h
…
README
…
rules.mak
Add scripts directory
2011-01-20 20:54:21 +00:00
rwhandler.c
Make simple io mem handler endian aware
2010-12-11 15:24:25 +00:00
rwhandler.h
Make simple io mem handler endian aware
2010-12-11 15:24:25 +00:00
s390-dis.c
…
s390.ld
…
savevm.c
Fix some typos in comments and documentation
2011-04-16 12:24:28 +01:00
sh4-dis.c
*-dis: Replace fprintf_ftype by fprintf_function (format checking)
2010-12-04 20:50:30 +00:00
simpletrace.c
simpletrace: Move st_init() error reporting
2011-03-15 18:03:26 +00:00
simpletrace.h
simpletrace: Move st_init() error reporting
2011-03-15 18:03:26 +00:00
softmmu_defs.h
…
softmmu_exec.h
…
softmmu_header.h
…
softmmu_template.h
…
softmmu-semi.h
…
sparc64.ld
…
sparc-dis.c
…
sparc.ld
…
spice-qemu-char.c
spice-chardev: listen to frontend guest open / close
2011-04-28 11:02:31 +05:30
sysemu.h
vl.c: Introduce getter for shutdown_requested and reset_requested.
2011-05-08 10:10:01 +02:00
targphys.h
…
tcg-runtime.c
…
thunk.c
…
thunk.h
…
TODO
…
trace-events
qed: Periodically flush and clear need check bit
2011-05-18 14:38:46 +02:00
translate-all.c
Remove unused function parameter from cpu_restore_state
2011-04-20 10:37:03 +02:00
uboot_image.h
…
usb-bsd.c
Fix trivial "endianness bugs"
2011-04-03 21:42:57 +02:00
usb-linux.c
usb-linux: Add missing break statement
2011-05-09 16:18:32 +02:00
usb-stub.c
…
VERSION
Open up the 0.15 development branch
2011-02-02 08:39:28 +01:00
version.rc
…
vgafont.h
…
vl.c
vl.c: Introduce getter for shutdown_requested and reset_requested.
2011-05-08 10:10:01 +02:00
x86_64.ld
…
xen-all.c
xen: Add Xen hypercall for sleep state in the cmos_s3 callback.
2011-05-08 10:10:02 +02:00
xen-mapcache-stub.c
xen: Introduce the Xen mapcache
2011-05-08 10:10:01 +02:00
xen-mapcache.c
Introduce qemu_put_ram_ptr
2011-05-08 10:10:01 +02:00
xen-mapcache.h
xen: Introduce the Xen mapcache
2011-05-08 10:10:01 +02:00
xen-stub.c
xen: Add Xen hypercall for sleep state in the cmos_s3 callback.
2011-05-08 10:10:02 +02:00

README 

Read the documentation in qemu-doc.html.

Fabrice Bellard.
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