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[Qemu-devel] [PATCH v5 07/35] linux-user: enable parallel code generatio
From: |
Richard Henderson |
Subject: |
[Qemu-devel] [PATCH v5 07/35] linux-user: enable parallel code generation on clone |
Date: |
Sun, 9 Oct 2016 18:41:38 -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 v5 00/35] cmpxchg-based emulation of atomics, Richard Henderson, 2016/10/09
- [Qemu-devel] [PATCH v5 03/35] exec: Avoid direct references to Int128 parts, Richard Henderson, 2016/10/09
- [Qemu-devel] [PATCH v5 01/35] atomics: add atomic_xor, Richard Henderson, 2016/10/09
- [Qemu-devel] [PATCH v5 02/35] atomics: add atomic_op_fetch variants, Richard Henderson, 2016/10/09
- [Qemu-devel] [PATCH v5 04/35] int128: Use __int128 if available, Richard Henderson, 2016/10/09
- [Qemu-devel] [PATCH v5 05/35] int128: Add int128_make128, Richard Henderson, 2016/10/09
- [Qemu-devel] [PATCH v5 08/35] cputlb: Replace SHIFT with DATA_SIZE, Richard Henderson, 2016/10/09
- [Qemu-devel] [PATCH v5 12/35] cputlb: Tidy some macros, Richard Henderson, 2016/10/09
- [Qemu-devel] [PATCH v5 07/35] linux-user: enable parallel code generation on clone,
Richard Henderson <=
- [Qemu-devel] [PATCH v5 10/35] cputlb: Remove includes from softmmu_template.h, Richard Henderson, 2016/10/09
- [Qemu-devel] [PATCH v5 11/35] cputlb: Move most of iotlb code out of line, Richard Henderson, 2016/10/09
- [Qemu-devel] [PATCH v5 14/35] tcg: Add atomic128 helpers, Richard Henderson, 2016/10/09
- [Qemu-devel] [PATCH v5 15/35] tcg: Add CONFIG_ATOMIC64, Richard Henderson, 2016/10/09
- [Qemu-devel] [PATCH v5 09/35] cputlb: Move probe_write out of softmmu_template.h, Richard Henderson, 2016/10/09
- [Qemu-devel] [PATCH v5 13/35] tcg: Add atomic helpers, Richard Henderson, 2016/10/09