xemu-project/xemu: Original Xbox Emulator for Windows, macOS, and Linux (Active Development) - xemu

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Anthony Liguori 893986fe94 main-loop: drop the BQL if the I/O appears to be spinning

The char-flow refactoring introduced a busy-wait that depended on
an action from the VCPU thread.  However, the VCPU thread could
never take that action because the busy-wait starved the VCPU thread
of the BQL because it never dropped the mutex while running select.

Paolo doesn't want to drop this optimization for fear that we will
stop detecting these busy waits.  I'm afraid to keep this optimization
even with the busy-wait fixed because I think a similar problem can
occur just with heavy I/O thread load manifesting itself as VCPU pauses.

As a compromise, introduce an artificial timeout after a thousand
iterations but print a rate limited warning when this happens.  This
let's us still detect when this condition occurs without it being
a fatal error.

Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Message-id: 1365169560-11012-1-git-send-email-aliguori@us.ibm.com

2013-04-05 12:53:33 -05:00

audio

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backends

qemu-char: Call fe_claim / fe_release when not using qdev chr properties

2013-04-04 19:21:25 -05:00

block

qcow2: Fix L1 write error handling in qcow2_update_snapshot_refcount

2013-04-05 18:58:05 +02:00

bsd-user

qemu-log: default to stderr for logging output

2013-02-26 13:31:47 -06:00

default-configs

VMXNET3 device implementation

2013-03-25 11:13:10 +01:00

disas

Add moxie disassembler

2013-03-23 14:25:41 +00:00

docs

trace: Provide a detailed event control interface

2013-03-28 14:19:57 +01:00

fpu

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fsdev

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gdb-xml

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Merge remote-tracking branch 'stefanha/trivial-patches' into staging

2013-04-05 12:52:48 -05:00

include

Merge remote-tracking branch 'kwolf/for-anthony' into staging

2013-04-05 12:49:10 -05:00

ldscripts

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libcacard

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linux-headers

linux-headers: Update to v3.9-rc2

2013-04-01 11:50:04 -06:00

linux-user

linux-user: Don't omit comma for strace of rt_sigaction()

2013-04-05 14:40:54 +02:00

net

qemu-char: Call fe_claim / fe_release when not using qdev chr properties

2013-04-04 19:21:25 -05:00

pc-bios

ipxe: update binaries

2013-03-25 09:13:18 +01:00

pixman @ 97336fad32

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po: Update German translation

2013-04-04 00:28:37 +02:00

qapi

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qga

Fix typos and misspellings

2013-03-22 13:25:07 +01:00

QMP

virtio,pci,qom

2013-03-26 16:16:43 -05:00

qobject

qstring: add qstring_get_length()

2013-04-05 08:42:29 -04:00

qom

virtio,pci,qom

2013-03-26 16:16:43 -05:00

roms

virtio,pci,qom

2013-03-26 16:16:43 -05:00

scripts

trace: [stderr] Port to generic event information and new control interface

2013-03-28 14:19:57 +01:00

slirp

oslib-posix: rename socket_set_nonblock() to qemu_set_nonblock()

2013-04-02 11:47:37 -04:00

stubs

stubs: Add a vmstate_dummy struct for CONFIG_USER_ONLY

2013-03-12 10:35:54 +01:00

sysconfigs/target

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target-alpha

cpu: Replace do_interrupt() by CPUClass::do_interrupt method

2013-03-12 10:35:55 +01:00

target-arm

target-arm: Override do_interrupt for ARMv7-M profile

2013-03-12 10:35:55 +01:00

target-cris

cpu: Replace do_interrupt() by CPUClass::do_interrupt method

2013-03-12 10:35:55 +01:00

target-i386

extract/unify the constant 0xfee00000 as APIC_DEFAULT_ADDRESS

2013-04-04 19:23:09 -05:00

target-lm32

target-lm32: use HELPER() macro

2013-03-18 19:40:34 +01:00

target-m68k

cpu: Replace do_interrupt() by CPUClass::do_interrupt method

2013-03-12 10:35:55 +01:00

target-microblaze

microblaze: Add support for the sleep insn

2013-04-02 10:47:29 +02:00

target-mips

target-mips: fix rndrashift_short_acc and code for EXTR_ instructions

2013-03-17 01:06:34 +01:00

target-moxie

target-moxie: set do_interrupt to a target-specific helper function

2013-03-31 18:26:31 +00:00

target-openrisc

cpu: Replace do_interrupt() by CPUClass::do_interrupt method

2013-03-12 10:35:55 +01:00

target-ppc

target-ppc: Use NARROW_MODE macro for tlbie

2013-03-22 15:28:54 +01:00

target-s390x

target-s390: Fix SRNMT

2013-04-05 14:54:11 +02:00

target-sh4

cpu: Replace do_interrupt() by CPUClass::do_interrupt method

2013-03-12 10:35:55 +01:00

target-sparc

cpu: Replace do_interrupt() by CPUClass::do_interrupt method

2013-03-12 10:35:55 +01:00

target-unicore32

cpu: Replace do_interrupt() by CPUClass::do_interrupt method

2013-03-12 10:35:55 +01:00

target-xtensa

cpu: Replace do_interrupt() by CPUClass::do_interrupt method

2013-03-12 10:35:55 +01:00

tcg

tcg/mips: Implement muls2_i32

2013-04-01 18:49:17 +02:00

tests

test-visitor-serialization: Fix some memory leaks

2013-04-05 14:38:45 +02:00

tpm

tpm: Fix several compiler warnings (redefined data types)

2013-04-03 15:06:03 -05:00

trace

trace: rebuild generated-events.o when configuration changes

2013-03-28 14:19:57 +01:00

Merge remote-tracking branch 'luiz/queue/qmp' into staging

2013-04-02 14:07:35 -05:00

util

Allow clock_gettime() monotonic clock to be utilized on more OS's

2013-04-04 20:22:45 -05:00

.exrc

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.gitignore

.gitignore: rename trace/generated-tracers.dtrace

2013-03-28 14:19:57 +01:00

.gitmodules

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.mailmap

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aio-posix.c

aio: support G_IO_HUP and G_IO_ERR

2013-02-21 16:17:31 -06:00

aio-win32.c

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arch_init.c

like acpi_table_install(), acpi_table_add() should propagate Errors

2013-04-04 19:23:08 -05:00

async.c

aio: add a ThreadPool instance to AioContext

2013-03-15 16:07:50 +01:00

balloon.c

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block-migration.c

migration: run setup callbacks out of big lock

2013-03-11 13:32:01 +01:00

block.c

block: clean up I/O throttling wait_time code

2013-04-05 18:58:05 +02:00

blockdev-nbd.c

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blockdev.c

block: keep I/O throttling slice time constant

2013-04-05 18:58:05 +02:00

blockjob.c

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bt-host.c

MinGW: Replace setsockopt by qemu_setsocketopt

2013-03-22 13:14:48 +01:00

bt-vhci.c

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Changelog

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cmd.c

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cmd.h

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CODING_STYLE

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configure

configure: remove unset variables

2013-04-02 14:05:15 -05:00

COPYING

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COPYING.LIB

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coroutine-gthread.c

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coroutine-sigaltstack.c

Merge remote-tracking branch 'kwolf/for-anthony' into staging

2013-02-26 07:44:39 -06:00

coroutine-ucontext.c

Merge remote-tracking branch 'kwolf/for-anthony' into staging

2013-02-26 07:44:39 -06:00

coroutine-win32.c

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cpu-exec.c

target-i386: Don't modify env->eflags around cpu_dump_state

2013-03-23 14:30:12 +00:00

cpus.c

cpu: Pass CPUState to cpu_interrupt()

2013-03-12 10:35:55 +01:00

cputlb.c

cpu: Move current_tb field to CPUState

2013-02-16 14:51:00 +01:00

device_tree.c

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device-hotplug.c

hw: move device-hotplug.o to toplevel, compile it once

2013-03-01 13:57:13 +01:00

disas.c

Add moxie disassembler

2013-03-23 14:25:41 +00:00

dma-helpers.c

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dump-stub.c

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dump.c

cpu: Move host_tid field to CPUState

2013-02-16 14:50:59 +01:00

exec.c

exec: assert that RAMBlock size is non-zero

2013-03-26 21:02:17 +02:00

gdbstub.c

qemu-char: Call fe_claim / fe_release when not using qdev chr properties

2013-04-04 19:21:25 -05:00

HACKING

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hmp-commands.hx

New QMP command query-cpu-max and HMP command cpu_max

2013-03-25 16:21:33 -04:00

hmp.c

Merge remote-tracking branch 'quintela/migration.next' into staging

2013-03-26 13:38:00 -05:00

hmp.h

New QMP command query-cpu-max and HMP command cpu_max

2013-03-25 16:21:33 -04:00

iohandler.c

iohandler: switch to GPollFD

2013-02-21 16:17:31 -06:00

ioport.c

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kvm-all.c

cpu: Pass CPUState to cpu_interrupt()

2013-03-12 10:35:55 +01:00

kvm-stub.c

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LICENSE

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main-loop.c

main-loop: drop the BQL if the I/O appears to be spinning

2013-04-05 12:53:33 -05:00

MAINTAINERS

Add top level changes for moxie

2013-03-23 14:25:42 +00:00

Makefile

trace: Provide a generic tracing event descriptor

2013-03-28 14:19:57 +01:00

Makefile.objs

Support for TPM command line options

2013-03-12 13:40:11 -05:00

Makefile.target

build: always link device_tree.o into emulators if libfdt available

2013-03-01 15:01:19 +01:00

memory_mapping-stub.c

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memory_mapping.c

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memory.c

memory: fix a bug of detection of memory region collision

2013-03-22 13:21:28 +01:00

migration-exec.c

migration: eliminate s->migration_file

2013-03-11 13:32:03 +01:00

migration-fd.c

migration: eliminate s->migration_file

2013-03-11 13:32:03 +01:00

migration-tcp.c

migration: eliminate s->migration_file

2013-03-11 13:32:03 +01:00

migration-unix.c

migration: eliminate s->migration_file

2013-03-11 13:32:03 +01:00

migration.c

oslib-posix: rename socket_set_nonblock() to qemu_set_nonblock()

2013-04-02 11:47:37 -04:00

monitor.c

hmp: human-monitor-command: stop using the Memory chardev driver

2013-04-05 08:42:29 -04:00

nbd.c

oslib-posix: rename socket_set_nonblock() to qemu_set_nonblock()

2013-04-02 11:47:37 -04:00

os-posix.c

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os-win32.c

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page_cache.c

page_cache: dup memory on insert

2013-03-11 13:32:03 +01:00

qapi-schema-test.json

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qapi-schema.json

qapi schema: add AcpiTableOptions

2013-04-04 19:23:08 -05:00

qdev-monitor.c

hw: move qdev-monitor.o to toplevel directory

2013-03-01 13:54:10 +01:00

qdict-test-data.txt

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qemu-bridge-helper.c

qemu-bridge-helper: force usage of a very high MAC address for the bridge

2013-03-28 12:58:52 -05:00

qemu-char.c

qemu-char: eliminate busy waiting on can_read returning zero

2013-04-05 12:53:07 -05:00

qemu-coroutine-io.c

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qemu-coroutine-lock.c

coroutine: use AioContext for CoQueue BH

2013-03-15 16:07:51 +01:00

qemu-coroutine-sleep.c

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qemu-coroutine.c

coroutine: move pooling to common code

2013-02-22 21:21:10 +01:00

qemu-doc.texi

sheepdog: add support for connecting to unix domain socket

2013-03-04 09:54:17 +01:00

qemu-img-cmds.hx

qemu-img: Add compare subcommand

2013-02-22 21:21:10 +01:00

qemu-img.c

block: Add options QDict to bdrv_open() prototype

2013-03-15 16:07:49 +01:00

qemu-img.texi

qemu-img: Add compare subcommand

2013-02-22 21:21:10 +01:00

qemu-io.c

block: Add options QDict to bdrv_file_open() prototypes

2013-03-22 17:51:31 +01:00

qemu-log.c

qemu-log: default to stderr for logging output

2013-02-26 13:31:47 -06:00

qemu-nbd.c

block: Add options QDict to bdrv_open() prototype

2013-03-15 16:07:49 +01:00

qemu-nbd.texi

qemu-nbd: add --discard option

2013-02-22 21:29:43 +01:00

qemu-options-wrapper.h

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qemu-options.h

…

qemu-options.hx

help: add docs for missing 'queues' option of tap

2013-04-03 15:09:07 -05:00

qemu-seccomp.c

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qemu-tech.texi

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qemu-timer.c

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qemu.sasl

…

qmp-commands.hx

Merge remote-tracking branch 'quintela/migration.next' into staging

2013-03-26 13:38:00 -05:00

qmp.c

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qtest.c

qtest: use synchronous I/O for char device

2013-03-26 10:08:12 -05:00

readline.c

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README

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rules.mak

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savevm.c

oslib-posix: rename socket_set_nonblock() to qemu_set_nonblock()

2013-04-02 11:47:37 -04:00

spice-qemu-char.c

spice-qemu-char: Drop hackish vmc_register on spice_chr_write

2013-03-27 10:26:50 -05:00

tcg-runtime.c

tcg: Implement multiword multiply helpers

2013-02-23 17:25:28 +00:00

tci.c

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thread-pool.c

threadpool: drop global thread pool

2013-03-15 16:07:51 +01:00

thunk.c

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trace-events

Merge remote-tracking branch 'stefanha/block' into staging

2013-03-28 12:57:37 -05:00

translate-all.c

tcg: Fix occasional TCG broken problem when ldst optimization enabled

2013-03-22 21:38:21 +01:00

translate-all.h

cputlb: Pass CPUState to cpu_unlink_tb()

2013-02-16 14:51:00 +01:00

user-exec.c

Replace all setjmp()/longjmp() with sigsetjmp()/siglongjmp()

2013-02-23 16:11:19 +00:00

VERSION

Open up 1.5 development tree

2013-02-15 17:40:56 -06:00

version.rc

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vl.c

acpi_table_add(): accept QemuOpts and parse it with OptsVisitor

2013-04-04 19:23:08 -05:00

xbzrle.c

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xen-all.c

cpu: Move halted and interrupt_request fields to CPUState

2013-03-12 10:35:55 +01:00

xen-mapcache.c

xen-mapcache: pass the right size argument to test_bits

2013-04-03 11:51:53 +00:00

xen-stub.c

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README

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

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