perf machine: Add machine__is() to identify machine arch

commit dbbd34a666ee117d0e39e71a47f38f02c4a5c698 upstream.

Add a function to identify the machine architecture.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Tested-by: Jiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Joerg Roedel <joro@8bytes.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: x86@kernel.org
Link: http://lkml.kernel.org/r/1526548928-20790-6-git-send-email-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/tools/perf/util/env.c b/tools/perf/util/env.c
index 6276b340f893e9afd7eed80c71cdd5f1987e8f96..49f58921a96874820e4c8076c58c3054f5137df9 100644 (file)
--- a/tools/perf/util/env.c
+++ b/tools/perf/util/env.c
@@ -3,6 +3,7 @@
 #include "env.h"
 #include "util.h"
 #include <errno.h>
+#include <sys/utsname.h>
 
 struct perf_env perf_env;
 
@@ -87,6 +88,24 @@ int perf_env__read_cpu_topology_map(struct perf_env *env)
        return 0;
 }
 
+static int perf_env__read_arch(struct perf_env *env)
+{
+       struct utsname uts;
+
+       if (env->arch)
+               return 0;
+
+       if (!uname(&uts))
+               env->arch = strdup(uts.machine);
+
+       return env->arch ? 0 : -ENOMEM;
+}
+
+const char *perf_env__raw_arch(struct perf_env *env)
+{
+       return env && !perf_env__read_arch(env) ? env->arch : "unknown";
+}
+
 void cpu_cache_level__free(struct cpu_cache_level *cache)
 {
        free(cache->type);

diff --git a/tools/perf/util/env.h b/tools/perf/util/env.h
index 1eb35b190b3423e44ef34797c7fa5097d719f956..bd3869913907e6faa88a8d794d7b4d2e70ae3a65 100644 (file)
--- a/tools/perf/util/env.h
+++ b/tools/perf/util/env.h
@@ -65,4 +65,7 @@ int perf_env__set_cmdline(struct perf_env *env, int argc, const char *argv[]);
 int perf_env__read_cpu_topology_map(struct perf_env *env);
 
 void cpu_cache_level__free(struct cpu_cache_level *cache);
+
+const char *perf_env__raw_arch(struct perf_env *env);
+
 #endif /* __PERF_ENV_H */

diff --git a/tools/perf/util/machine.c b/tools/perf/util/machine.c
index bd5d5b5e2218c89e9ccc8cc216db41f8a88044d7..2af879693fbe495ba2c9f832c8fe749dad69fa18 100644 (file)
--- a/tools/perf/util/machine.c
+++ b/tools/perf/util/machine.c
@@ -2238,6 +2238,15 @@ int machine__set_current_tid(struct machine *machine, int cpu, pid_t pid,
        return 0;
 }
 
+/*
+ * Compares the raw arch string. N.B. see instead perf_env__arch() if a
+ * normalized arch is needed.
+ */
+bool machine__is(struct machine *machine, const char *arch)
+{
+       return machine && !strcmp(perf_env__raw_arch(machine->env), arch);
+}
+
 int machine__get_kernel_start(struct machine *machine)
 {
        struct map *map = machine__kernel_map(machine);

diff --git a/tools/perf/util/machine.h b/tools/perf/util/machine.h
index d551aa80a59bab2a3982e4268d005b173948a540..fbc5133fb27ca075303eece2692a2d004b6285e2 100644 (file)
--- a/tools/perf/util/machine.h
+++ b/tools/perf/util/machine.h
@@ -169,6 +169,8 @@ static inline bool machine__is_host(struct machine *machine)
        return machine ? machine->pid == HOST_KERNEL_ID : false;
 }
 
+bool machine__is(struct machine *machine, const char *arch);
+
 struct thread *__machine__findnew_thread(struct machine *machine, pid_t pid, pid_t tid);
 struct thread *machine__findnew_thread(struct machine *machine, pid_t pid, pid_t tid);