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authorThomas Petazzoni <thomas.petazzoni@free-electrons.com>2013-12-29 17:03:55 (GMT)
committer Thomas Petazzoni <thomas.petazzoni@free-electrons.com>2013-12-31 11:38:33 (GMT)
commit8bc28f5be004d9c3bc033b2bc394e5b92c942d38 (patch)
treee9bbb4ca3e070cbece7beac1310c0e855b223d29
parent771772bb97ce1c780a0e5b6acb0426e2a1b9ccf3 (diff)
downloadbuildroot-8bc28f5be004d9c3bc033b2bc394e5b92c942d38.tar.gz
buildroot-8bc28f5be004d9c3bc033b2bc394e5b92c942d38.tar.bz2
iozone: add fix for missing pthread_setaffinity_np()
The iozone code uses the pthread_setaffinity_np() function, but with uClibc this function is only available when the NPTL thread implementation is used. Some architectures, such as AVR32 and ARC do not support the NPTL thread implementation, and therefore lack the pthread_setaffinity_np() function. This commit adds a patch that provides an empty implementation of pthread_setaffinity_np() when we're using uClibc, but not with the NPTL thread implementation. The reasoning is that there is a very high chance that the few architectures that do not implement NPTL are non-SMP architectures, and therefore setting the affinity is not very useful. In addition to this, this commit: * Renames the existing patch to use a sequence number, in order to guarantee a proper ordering when applying patches. * Removes the Kconfig dependency on !uClibc 0.9.31, which was introduced to prevent AVR32 from failing due to the pthread_setaffinity_np(). This conditional is no longer necessary due to the new patch, and the conditional was anyway not completely working since it was not taking into account the case of external toolchains. Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
-rw-r--r--package/iozone/Config.in1
-rw-r--r--package/iozone/iozone-01-targets.patch (renamed from package/iozone/iozone-targets.patch)0
-rw-r--r--package/iozone/iozone-02-no-nptl-support.patch37
3 files changed, 37 insertions, 1 deletions
diff --git a/package/iozone/Config.in b/package/iozone/Config.in
index 33e12ca..26d4daa 100644
--- a/package/iozone/Config.in
+++ b/package/iozone/Config.in
@@ -1,7 +1,6 @@
config BR2_PACKAGE_IOZONE
bool "iozone"
depends on BR2_USE_MMU # fork()
- depends on !BR2_UCLIBC_VERSION_0_9_31 # no pthread_setaffinity_np
help
IOzone is a filesystem benchmark tool.
The benchmark generates and measures a variety of file operations
diff --git a/package/iozone/iozone-targets.patch b/package/iozone/iozone-01-targets.patch
index 258b960..258b960 100644
--- a/package/iozone/iozone-targets.patch
+++ b/package/iozone/iozone-01-targets.patch
diff --git a/package/iozone/iozone-02-no-nptl-support.patch b/package/iozone/iozone-02-no-nptl-support.patch
new file mode 100644
index 0000000..493f52c
--- /dev/null
+++ b/package/iozone/iozone-02-no-nptl-support.patch
@@ -0,0 +1,37 @@
+Dummy pthread_setaffinity_np() when not available
+
+On uClibc configurations that do not use the NPTL thread
+implementation, pthread_setaffinity_np() is not available. This patch
+defines a dummy (empty) implementation of this function for such
+cases.
+
+The only few architectures that do not provide the NPTL thread
+implementation are very likely to be non-SMP architectures, and
+therefore, setting the affinity of the thread is not doing anything
+useful, so having an empty stub for pthread_setaffinity_np() is not a
+problem.
+
+Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
+
+Index: b/src/current/iozone.c
+===================================================================
+--- a/src/current/iozone.c
++++ b/src/current/iozone.c
+@@ -306,6 +306,17 @@
+ #endif
+ #endif
+
++#if defined (__linux__)
++#include <features.h>
++#if defined (__UCLIBC__) && !defined (__UCLIBC_HAS_THREADS_NATIVE__)
++static int pthread_setaffinity_np(pthread_t thread, size_t cpusetsize,
++ const cpu_set_t *cpuset)
++{
++ return 0;
++}
++#endif
++#endif
++
+ #if ((defined(solaris) && defined(__LP64__)) || defined(__s390x__))
+ /* If we are building for 64-bit Solaris, all functions that return pointers
+ * must be declared before they are used; otherwise the compiler will assume