Changes for v10: - Fixed one case in cpu_throttle_thread, where we were using qemu_global_mutex instead of cpu->lock for the halt_cond. - Changed qemu_cpu_kick() to ensure we are under the CPU lock so we do not miss a notification. - Added a few more reviewed-bys.
v9: https://lists.gnu.org/archive/html/qemu-devel/2020-05/msg06289.html Quoting an earlier patch in the series: "For context, the goal of this series is to substitute the BQL for the per-CPU locks in many places, notably the execution loop in cpus.c. This leads to better scalability for MTTCG, since CPUs don't have to acquire a contended global lock (the BQL) every time they stop executing code. See the last commit for some performance numbers." Emilio G. Cota (68): cpu: rename cpu->work_mutex to cpu->lock cpu: introduce cpu_mutex_lock/unlock cpu: make qemu_work_cond per-cpu cpu: move run_on_cpu to cpus-common cpu: introduce process_queued_cpu_work_locked cpu: make per-CPU locks an alias of the BQL in TCG rr mode tcg-runtime: define helper_cpu_halted_set ppc: convert to helper_cpu_halted_set cris: convert to helper_cpu_halted_set hppa: convert to helper_cpu_halted_set m68k: convert to helper_cpu_halted_set alpha: convert to helper_cpu_halted_set microblaze: convert to helper_cpu_halted_set cpu: define cpu_halted helpers tcg-runtime: convert to cpu_halted_set arm: convert to cpu_halted ppc: convert to cpu_halted sh4: convert to cpu_halted i386: convert to cpu_halted lm32: convert to cpu_halted m68k: convert to cpu_halted mips: convert to cpu_halted riscv: convert to cpu_halted s390x: convert to cpu_halted sparc: convert to cpu_halted xtensa: convert to cpu_halted gdbstub: convert to cpu_halted openrisc: convert to cpu_halted cpu-exec: convert to cpu_halted cpu: convert to cpu_halted cpu: define cpu_interrupt_request helpers exec: use cpu_reset_interrupt arm: convert to cpu_interrupt_request i386: convert to cpu_interrupt_request i386/kvm: convert to cpu_interrupt_request i386/hax-all: convert to cpu_interrupt_request i386/whpx-all: convert to cpu_interrupt_request i386/hvf: convert to cpu_request_interrupt ppc: convert to cpu_interrupt_request sh4: convert to cpu_interrupt_request cris: convert to cpu_interrupt_request hppa: convert to cpu_interrupt_request lm32: convert to cpu_interrupt_request m68k: convert to cpu_interrupt_request mips: convert to cpu_interrupt_request nios: convert to cpu_interrupt_request s390x: convert to cpu_interrupt_request alpha: convert to cpu_interrupt_request moxie: convert to cpu_interrupt_request sparc: convert to cpu_interrupt_request openrisc: convert to cpu_interrupt_request unicore32: convert to cpu_interrupt_request microblaze: convert to cpu_interrupt_request accel/tcg: convert to cpu_interrupt_request cpu: convert to interrupt_request cpu: call .cpu_has_work with the CPU lock held cpu: introduce cpu_has_work_with_iothread_lock ppc: convert to cpu_has_work_with_iothread_lock mips: convert to cpu_has_work_with_iothread_lock s390x: convert to cpu_has_work_with_iothread_lock riscv: convert to cpu_has_work_with_iothread_lock sparc: convert to cpu_has_work_with_iothread_lock xtensa: convert to cpu_has_work_with_iothread_lock cpu: rename all_cpu_threads_idle to qemu_tcg_rr_all_cpu_threads_idle cpu: protect CPU state with cpu->lock instead of the BQL cpus-common: release BQL earlier in run_on_cpu cpu: add async_run_on_cpu_no_bql cputlb: queue async flush jobs without the BQL Paolo Bonzini (4): ppc: use cpu_reset_interrupt i386: use cpu_reset_interrupt s390x: use cpu_reset_interrupt openrisc: use cpu_reset_interrupt Robert Foley (1): hw/semihosting: convert to cpu_halted_set accel/tcg/cpu-exec.c | 40 ++- accel/tcg/cputlb.c | 10 +- accel/tcg/tcg-all.c | 12 +- accel/tcg/tcg-runtime.c | 7 + accel/tcg/tcg-runtime.h | 2 + accel/tcg/translate-all.c | 2 +- cpus-common.c | 108 ++++++-- cpus.c | 456 ++++++++++++++++++++++++++------ exec.c | 2 +- gdbstub.c | 4 +- hw/arm/omap1.c | 4 +- hw/arm/pxa2xx_gpio.c | 2 +- hw/arm/pxa2xx_pic.c | 2 +- hw/core/cpu.c | 28 +- hw/core/machine-qmp-cmds.c | 2 +- hw/core/machine.c | 1 + hw/intc/s390_flic.c | 4 +- hw/mips/cps.c | 2 +- hw/misc/mips_itu.c | 4 +- hw/openrisc/cputimer.c | 2 +- hw/ppc/e500.c | 4 +- hw/ppc/ppc.c | 12 +- hw/ppc/ppce500_spin.c | 6 +- hw/ppc/spapr_cpu_core.c | 4 +- hw/ppc/spapr_hcall.c | 14 +- hw/ppc/spapr_rtas.c | 8 +- hw/semihosting/console.c | 4 +- hw/sparc/leon3.c | 2 +- hw/sparc/sun4m.c | 8 +- hw/sparc64/sparc64.c | 8 +- include/hw/core/cpu.h | 196 ++++++++++++-- stubs/Makefile.objs | 1 + stubs/cpu-lock.c | 27 ++ target/alpha/cpu.c | 8 +- target/alpha/translate.c | 6 +- target/arm/arm-powerctl.c | 6 +- target/arm/cpu.c | 8 +- target/arm/helper.c | 16 +- target/arm/machine.c | 2 +- target/arm/op_helper.c | 2 +- target/cris/cpu.c | 2 +- target/cris/helper.c | 4 +- target/cris/translate.c | 5 +- target/hppa/cpu.c | 2 +- target/hppa/translate.c | 3 +- target/i386/cpu.c | 4 +- target/i386/cpu.h | 2 +- target/i386/hax-all.c | 42 +-- target/i386/helper.c | 8 +- target/i386/hvf/hvf.c | 12 +- target/i386/hvf/x86hvf.c | 37 +-- target/i386/kvm.c | 82 +++--- target/i386/misc_helper.c | 2 +- target/i386/seg_helper.c | 13 +- target/i386/svm_helper.c | 6 +- target/i386/whpx-all.c | 57 ++-- target/lm32/cpu.c | 2 +- target/lm32/op_helper.c | 4 +- target/m68k/cpu.c | 2 +- target/m68k/op_helper.c | 2 +- target/m68k/translate.c | 9 +- target/microblaze/cpu.c | 2 +- target/microblaze/translate.c | 4 +- target/mips/cp0_helper.c | 6 +- target/mips/cpu.c | 11 +- target/mips/kvm.c | 4 +- target/mips/op_helper.c | 2 +- target/mips/translate.c | 4 +- target/moxie/cpu.c | 2 +- target/nios2/cpu.c | 2 +- target/openrisc/cpu.c | 4 +- target/openrisc/sys_helper.c | 4 +- target/ppc/excp_helper.c | 6 +- target/ppc/helper_regs.h | 2 +- target/ppc/kvm.c | 6 +- target/ppc/translate.c | 6 +- target/ppc/translate_init.inc.c | 41 +-- target/riscv/cpu.c | 5 +- target/riscv/op_helper.c | 2 +- target/s390x/cpu.c | 28 +- target/s390x/excp_helper.c | 4 +- target/s390x/kvm.c | 2 +- target/s390x/sigp.c | 8 +- target/sh4/cpu.c | 2 +- target/sh4/helper.c | 2 +- target/sh4/op_helper.c | 2 +- target/sparc/cpu.c | 6 +- target/sparc/helper.c | 2 +- target/unicore32/cpu.c | 2 +- target/unicore32/softmmu.c | 2 +- target/xtensa/cpu.c | 6 +- target/xtensa/exc_helper.c | 2 +- target/xtensa/helper.c | 2 +- 93 files changed, 1063 insertions(+), 456 deletions(-) create mode 100644 stubs/cpu-lock.c -- 2.17.1