From e7de6cf99f73d1157bf384030eb395adcff56772 Mon Sep 17 00:00:00 2001
From: Frederic Brault <fbrault@xxxxxxxxxx>
Date: Mon, 12 Mar 2018 10:52:34 +0100
Subject: [PATCH] Explicit default thread stack size on x86_64
---
man3/pthread_create.3 | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/man3/pthread_create.3 b/man3/pthread_create.3
index 2bfe58b..d8f386c 100644
--- a/man3/pthread_create.3
+++ b/man3/pthread_create.3
@@ -200,7 +200,7 @@ was set to create the thread in a detached state (using
.PP
.\" FIXME . Perhaps some of the following detail should be in
.\" a future pthread_attr_setstacksize(3) page.
-On Linux/x86-32, the default stack size for a new thread is 2 megabytes.
+On Linux/x86-32 and Linux/x86_64, the default stack size for a new
thread is 2 megabytes.
Under the NPTL threading implementation, if the
.BR RLIMIT_STACK
soft resource limit
--
2.3.3
On modern linux, ulimit -s unlimited paradoxically gives you a *SMALL*
stack size for threads (2MB).
I updated the NOTE to say that this applies not only for x86-32, but
also for x86_64, because of the following code in libc :
nptl-init.c, in function __pthread_initialize_minimal_internal (void) :
if (__getrlimit (RLIMIT_STACK, &limit) != 0 || limit.rlim_cur ==
RLIM_INFINITY)
/* The system limit is not usable. Use an architecture-specific
default. */
limit.rlim_cur = ARCH_STACK_DEFAULT_SIZE;
And the different per-architecture values :
sysdeps/aarch64/nptl/pthreaddef.h #define ARCH_STACK_DEFAULT_SIZE (2 *
1024 * 1024)
sysdeps/alpha/nptl/pthreaddef.h #define ARCH_STACK_DEFAULT_SIZE (4 *
1024 * 1024)
sysdeps/arm/nptl/pthreaddef.h #define ARCH_STACK_DEFAULT_SIZE (2 * 1024
* 1024)
sysdeps/hppa/nptl/pthreaddef.h #define ARCH_STACK_DEFAULT_SIZE (8 *
1024 * 1024)
sysdeps/i386/nptl/pthreaddef.h #define ARCH_STACK_DEFAULT_SIZE (2 *
1024 * 1024)
sysdeps/ia64/nptl/pthreaddef.h #define ARCH_STACK_DEFAULT_SIZE (32 *
1024 * 1024)
sysdeps/m68k/nptl/pthreaddef.h #define ARCH_STACK_DEFAULT_SIZE (2 *
1024 * 1024)
sysdeps/microblaze/nptl/pthreaddef.h #define ARCH_STACK_DEFAULT_SIZE
(2 * 1024 * 1024)
sysdeps/mips/nptl/pthreaddef.h #define ARCH_STACK_DEFAULT_SIZE (2 *
1024 * 1024)
sysdeps/nios2/nptl/pthreaddef.h #define ARCH_STACK_DEFAULT_SIZE (2 *
1024 * 1024)
sysdeps/powerpc/nptl/pthreaddef.h #define ARCH_STACK_DEFAULT_SIZE (4 *
1024 * 1024)
sysdeps/riscv/nptl/pthreaddef.h #define ARCH_STACK_DEFAULT_SIZE (2 *
1024 * 1024)
sysdeps/s390/nptl/pthreaddef.h #define ARCH_STACK_DEFAULT_SIZE (2 *
1024 * 1024)
sysdeps/sh/nptl/pthreaddef.h #define ARCH_STACK_DEFAULT_SIZE (2 * 1024
* 1024)
sysdeps/sparc/sparc32/pthreaddef.h #define ARCH_STACK_DEFAULT_SIZE (2 *
1024 * 1024)
sysdeps/sparc/sparc64/pthreaddef.h #define ARCH_STACK_DEFAULT_SIZE (4 *
1024 * 1024)
sysdeps/tile/nptl/pthreaddef.h #define ARCH_STACK_DEFAULT_SIZE (2 *
1024 * 1024)
sysdeps/x86_64/nptl/pthreaddef.h #define ARCH_STACK_DEFAULT_SIZE (2 *
1024 * 1024)
Maybe a specific section in pthread_attr_setstacksize.3 would be
interesting, listing all archictecture.
I can do another patch with that if you think it makes sense.
Regards,
Frederic Brault
From e7de6cf99f73d1157bf384030eb395adcff56772 Mon Sep 17 00:00:00 2001
From: Frederic Brault <fbrault@xxxxxxxxxx>
Date: Mon, 12 Mar 2018 10:52:34 +0100
Subject: [PATCH] Explicit default thread stack size on x86_64
---
man3/pthread_create.3 | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/man3/pthread_create.3 b/man3/pthread_create.3
index 2bfe58b..d8f386c 100644
--- a/man3/pthread_create.3
+++ b/man3/pthread_create.3
@@ -200,7 +200,7 @@ was set to create the thread in a detached state (using
.PP
.\" FIXME . Perhaps some of the following detail should be in
.\" a future pthread_attr_setstacksize(3) page.
-On Linux/x86-32, the default stack size for a new thread is 2 megabytes.
+On Linux/x86-32 and Linux/x86_64, the default stack size for a new thread is 2 megabytes.
Under the NPTL threading implementation, if the
.BR RLIMIT_STACK
soft resource limit
--
2.3.3
