[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
[Qemu-devel] [PULL 07/35] linux-user: enable parallel code generation on
From: |
Richard Henderson |
Subject: |
[Qemu-devel] [PULL 07/35] linux-user: enable parallel code generation on clone |
Date: |
Sat, 22 Oct 2016 14:04:56 -0700 |
From: Alex Bennée <address@hidden>
The variable parallel_cpus controls the generation of thread aware
atomic code. We only need to set it once we clone our first thread.
At this point any existing translations need to be thrown away.
Reviewed-by: Emilio G. Cota <address@hidden>
Signed-off-by: Alex Bennée <address@hidden>
Signed-off-by: Richard Henderson <address@hidden>
---
linux-user/syscall.c | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/linux-user/syscall.c b/linux-user/syscall.c
index 03339ba..52740b7 100644
--- a/linux-user/syscall.c
+++ b/linux-user/syscall.c
@@ -6144,6 +6144,14 @@ static int do_fork(CPUArchState *env, unsigned int
flags, abi_ulong newsp,
sigfillset(&sigmask);
sigprocmask(SIG_BLOCK, &sigmask, &info.sigmask);
+ /* If this is our first additional thread, we need to ensure we
+ * generate code for parallel execution and flush old translations.
+ */
+ if (!parallel_cpus) {
+ parallel_cpus = true;
+ tb_flush(cpu);
+ }
+
ret = pthread_create(&info.thread, &attr, clone_func, &info);
/* TODO: Free new CPU state if thread creation failed. */
--
2.7.4
- [Qemu-devel] [PULL 00/35] cmpxchg atomic operations, Richard Henderson, 2016/10/22
- [Qemu-devel] [PULL 01/35] atomics: add atomic_xor, Richard Henderson, 2016/10/22
- [Qemu-devel] [PULL 05/35] int128: Add int128_make128, Richard Henderson, 2016/10/22
- [Qemu-devel] [PULL 03/35] exec: Avoid direct references to Int128 parts, Richard Henderson, 2016/10/22
- [Qemu-devel] [PULL 09/35] cputlb: Move probe_write out of softmmu_template.h, Richard Henderson, 2016/10/22
- [Qemu-devel] [PULL 10/35] cputlb: Remove includes from softmmu_template.h, Richard Henderson, 2016/10/22
- [Qemu-devel] [PULL 02/35] atomics: add atomic_op_fetch variants, Richard Henderson, 2016/10/22
- [Qemu-devel] [PULL 04/35] int128: Use __int128 if available, Richard Henderson, 2016/10/22
- [Qemu-devel] [PULL 07/35] linux-user: enable parallel code generation on clone,
Richard Henderson <=
- [Qemu-devel] [PULL 08/35] cputlb: Replace SHIFT with DATA_SIZE, Richard Henderson, 2016/10/22
- [Qemu-devel] [PULL 11/35] cputlb: Move most of iotlb code out of line, Richard Henderson, 2016/10/22
- [Qemu-devel] [PULL 14/35] tcg: Add atomic128 helpers, Richard Henderson, 2016/10/22
- [Qemu-devel] [PULL 12/35] cputlb: Tidy some macros, Richard Henderson, 2016/10/22
- [Qemu-devel] [PULL 15/35] tcg: Add CONFIG_ATOMIC64, Richard Henderson, 2016/10/22
- [Qemu-devel] [PULL 21/35] target-i386: emulate LOCK'ed NEG using cmpxchg helper, Richard Henderson, 2016/10/22
- [Qemu-devel] [PULL 18/35] target-i386: emulate LOCK'ed OP instructions using atomic helpers, Richard Henderson, 2016/10/22
- [Qemu-devel] [PULL 22/35] target-i386: emulate LOCK'ed XADD using atomic helper, Richard Henderson, 2016/10/22
- [Qemu-devel] [PULL 20/35] target-i386: emulate LOCK'ed NOT using atomic helper, Richard Henderson, 2016/10/22
- [Qemu-devel] [PULL 19/35] target-i386: emulate LOCK'ed INC using atomic helper, Richard Henderson, 2016/10/22