turbostat: Increase output buffer size to accommodate C8-C10

On platforms with C8-C10 support, the additional C-states cause
turbostat to overrun its output buffer of 128 bytes per CPU.  Increase
this to 256 bytes per CPU.

[ As a bugfix, this should go into 3.10; however, since the C8-C10
  support didn't go in until after 3.9, this need not go into any stable
  kernel. ]

Signed-off-by: Josh Triplett <josh@joshtriplett.org>
Cc: Len Brown <len.brown@intel.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/tools/power/x86/turbostat/turbostat.c b/tools/power/x86/turbostat/turbostat.c
index 9e9d348711953a44006b7c377a898e98c15b131d..fe702076ca46cc2d3d02bab818446c9d15f8c392 100644 (file)
--- a/tools/power/x86/turbostat/turbostat.c
+++ b/tools/power/x86/turbostat/turbostat.c
@@ -2191,7 +2191,7 @@ int initialize_counters(int cpu_id)
 
 void allocate_output_buffer()
 {
-       output_buffer = calloc(1, (1 + topo.num_cpus) * 128);
+       output_buffer = calloc(1, (1 + topo.num_cpus) * 256);
        outp = output_buffer;
        if (outp == NULL) {
                perror("calloc");