- add applet taskset to set/retrieve the CPU affinity of a process

   text    data     bss     dec     hex filename
    584       0       0     584     248 taskset.o.gcc-2.95
    509       0       0     509     1fd taskset.o.gcc-3.3
    505       0       0     505     1f9 taskset.o.gcc-3.4
    506       0       0     506     1fa taskset.o.gcc-4.0
    498       0       0     498     1f2 taskset.o.gcc-4.1
    495       0       0     495     1ef taskset.o.gcc-4.2-HEAD

2 files changed, 18 insertions, 0 deletions

diff --git a/include/applets.h b/include/applets.h
index d020c5f89..c9d5ac162 100644
--- a/include/applets.h
+++ b/include/applets.h
@@ -262,6 +262,7 @@ USE_BB_SYSCTL(APPLET(sysctl, _BB_DIR_SBIN, _BB_SUID_NEVER))
 USE_SYSLOGD(APPLET(syslogd, _BB_DIR_SBIN, _BB_SUID_NEVER))
 USE_TAIL(APPLET(tail, _BB_DIR_USR_BIN, _BB_SUID_NEVER))
 USE_TAR(APPLET(tar, _BB_DIR_BIN, _BB_SUID_NEVER))
+USE_TASKSET(APPLET(taskset, _BB_DIR_USR_BIN, _BB_SUID_NEVER))
 USE_TEE(APPLET(tee, _BB_DIR_USR_BIN, _BB_SUID_NEVER))
 USE_TELNET(APPLET(telnet, _BB_DIR_USR_BIN, _BB_SUID_NEVER))
 USE_TELNETD(APPLET(telnetd, _BB_DIR_USR_SBIN, _BB_SUID_NEVER))
diff --git a/include/usage.h b/include/usage.h
index 239bbb373..9bdfb3fe0 100644
--- a/include/usage.h
+++ b/include/usage.h
@@ -2955,6 +2955,23 @@ USE_FEATURE_DATE_ISOFMT( \
         "$ zcat /tmp/tarball.tar.gz | tar -xf -\n" \
         "$ tar -cf /tmp/tarball.tar /usr/local\n"
 
+#define taskset_trivial_usage \
+        "[OPTIONS] [mask] [pid | command [arg]...]"
+#define taskset_full_usage \
+        "Set or get CPU affinity.\n\n" \
+        "Options:\n" \
+        "\t-p\toperate on an existing PID"
+#define taskset_example_usage \
+        "$ taskset 0x7 ./dgemm_test&\n" \
+        "$ taskset -p 0x1 $!\n" \
+        "pid 4790's current affinity mask: 7\n" \
+        "pid 4790's new affinity mask: 1\n" \
+        "$ taskset 0x7 /bin/sh -c './taskset -p 0x1 $$'\n" \
+        "pid 6671's current affinity mask: 1\n" \
+        "pid 6671's new affinity mask: 1\n" \
+        "$ taskset -p 1\n"
+        "pid 1's current affinity mask: 3\n"
+
 #define tee_trivial_usage \
         "[OPTION]... [FILE]..."
 #define tee_full_usage \