Jan Kiszka 8d04fb55de tcg: drop global lock during TCG code execution ... This finally allows TCG to benefit from the iothread introduction: Drop the global mutex while running pure TCG CPU code. Reacquire the lock when entering MMIO or PIO emulation, or when leaving the TCG loop. We have to revert a few optimization for the current TCG threading model, namely kicking the TCG thread in qemu_mutex_lock_iothread and not kicking it in qemu_cpu_kick. We also need to disable RAM block reordering until we have a more efficient locking mechanism at hand. Still, a Linux x86 UP guest and my Musicpal ARM model boot fine here. These numbers demonstrate where we gain something: 20338 jan 20 0 331m 75m 6904 R 99 0.9 0:50.95 qemu-system-arm 20337 jan 20 0 331m 75m 6904 S 20 0.9 0:26.50 qemu-system-arm The guest CPU was fully loaded, but the iothread could still run mostly independent on a second core. Without the patch we don't get beyond 32206 jan 20 0 330m 73m 7036 R 82 0.9 1:06.00 qemu-system-arm 32204 jan 20 0 330m 73m 7036 S 21 0.9 0:17.03 qemu-system-arm We don't benefit significantly, though, when the guest is not fully loading a host CPU. Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Message-Id: <1439220437-23957-10-git-send-email-fred.konrad@greensocs.com> [FK: Rebase, fix qemu_devices_reset deadlock, rm address_space_* mutex] Signed-off-by: KONRAD Frederic <fred.konrad@greensocs.com> [EGC: fixed iothread lock for cpu-exec IRQ handling] Signed-off-by: Emilio G. Cota <cota@braap.org> [AJB: -smp single-threaded fix, clean commit msg, BQL fixes] Signed-off-by: Alex Bennée <alex.bennee@linaro.org> Reviewed-by: Richard Henderson <rth@twiddle.net> Reviewed-by: Pranith Kumar <bobby.prani@gmail.com> [PM: target-arm changes] Acked-by: Peter Maydell <peter.maydell@linaro.org>		2017-02-24 10:32:45 +00:00
..
arch_dump.c
cc_helper.c
cpu_features_def.h
cpu_features.c
cpu_features.h
cpu_models.c	qmp: Report QOM type name on query-cpu-definitions	2017-01-12 15:51:36 -02:00
cpu_models.h
cpu-qom.h
cpu.c	qom/cpu: move tlb_flush to cpu_common_reset	2017-01-13 14:24:31 +00:00
cpu.h	qom/cpu: move tlb_flush to cpu_common_reset	2017-01-13 14:24:31 +00:00
fpu_helper.c
gdbstub.c	* QOM interface fix (Eduardo)	2017-01-20 16:42:07 +00:00
gen-features.c
helper.c
helper.h	target-s390x: Use clz opcode	2017-01-10 08:06:11 -08:00
insn-data.def
insn-format.def
int_helper.c	target-s390x: Avoid a loop for popcnt	2017-01-10 08:48:57 -08:00
interrupt.c
ioinst.c
kvm.c	report guest crash information in GUEST_PANICKED event	2017-02-16 15:30:49 +01:00
machine.c	migration: consolidate VMStateField.start	2017-02-13 17:27:13 +00:00
Makefile.objs
mem_helper.c	cputlb: drop flush_global flag from tlb_flush	2017-01-13 14:24:37 +00:00
misc_helper.c	tcg: drop global lock during TCG code execution	2017-02-24 10:32:45 +00:00
mmu_helper.c
trace-events
translate.c	target-s390x: Use clz opcode	2017-01-10 08:06:11 -08:00