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[Qemu-devel] [PATCH v6 07/35] linux-user: enable parallel code generatio
From: |
Richard Henderson |
Subject: |
[Qemu-devel] [PATCH v6 07/35] linux-user: enable parallel code generation on clone |
Date: |
Tue, 11 Oct 2016 14:40:33 -0500 |
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.
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 0815f30..9d528bd 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] [PATCH v6 00/35] cmpxchg-based emulation of atomics, Richard Henderson, 2016/10/11
- [Qemu-devel] [PATCH v6 01/35] atomics: add atomic_xor, Richard Henderson, 2016/10/11
- [Qemu-devel] [PATCH v6 02/35] atomics: add atomic_op_fetch variants, Richard Henderson, 2016/10/11
- [Qemu-devel] [PATCH v6 03/35] exec: Avoid direct references to Int128 parts, Richard Henderson, 2016/10/11
- [Qemu-devel] [PATCH v6 04/35] int128: Use __int128 if available, Richard Henderson, 2016/10/11
- [Qemu-devel] [PATCH v6 05/35] int128: Add int128_make128, Richard Henderson, 2016/10/11
- [Qemu-devel] [PATCH v6 07/35] linux-user: enable parallel code generation on clone,
Richard Henderson <=
- [Qemu-devel] [PATCH v6 08/35] cputlb: Replace SHIFT with DATA_SIZE, Richard Henderson, 2016/10/11
- [Qemu-devel] [PATCH v6 09/35] cputlb: Move probe_write out of softmmu_template.h, Richard Henderson, 2016/10/11
- [Qemu-devel] [PATCH v6 10/35] cputlb: Remove includes from softmmu_template.h, Richard Henderson, 2016/10/11
- [Qemu-devel] [PATCH v6 11/35] cputlb: Move most of iotlb code out of line, Richard Henderson, 2016/10/11
- [Qemu-devel] [PATCH v6 12/35] cputlb: Tidy some macros, Richard Henderson, 2016/10/11
- [Qemu-devel] [PATCH v6 16/35] tcg: Emit barriers with parallel_cpus, Richard Henderson, 2016/10/11
- [Qemu-devel] [PATCH v6 14/35] tcg: Add atomic128 helpers, Richard Henderson, 2016/10/11
- [Qemu-devel] [PATCH v6 15/35] tcg: Add CONFIG_ATOMIC64, Richard Henderson, 2016/10/11
- [Qemu-devel] [PATCH v6 13/35] tcg: Add atomic helpers, Richard Henderson, 2016/10/11