perf/x86/uncore: use MiB unit for events for SNB/IVB/HSW IMC

This patch makes perf use Mebibytes to display the counts
of uncore_imc/data_reads/ and uncore_imc/data_writes.

1MiB = 1024*1024 bytes.

Cc: mingo@elte.hu
Cc: acme@redhat.com
Cc: ak@linux.intel.com
Cc: zheng.z.yan@intel.com
Cc: peterz@infradead.org
Signed-off-by: NStephane Eranian <eranian@google.com>
Signed-off-by: NPeter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1392132015-14521-9-git-send-email-eranian@google.comSigned-off-by: NThomas Gleixner <tglx@linutronix.de>

arch/x86/kernel/cpu/perf_event_intel_uncore.c

@@ -1679,12 +1679,12 @@ enum {
 
 static struct uncore_event_desc snb_uncore_imc_events[] = {
 	INTEL_UNCORE_EVENT_DESC(data_reads,  "event=0x01"),
-	INTEL_UNCORE_EVENT_DESC(data_reads.scale, "64"),
-	INTEL_UNCORE_EVENT_DESC(data_reads.unit, "bytes"),
+	INTEL_UNCORE_EVENT_DESC(data_reads.scale, "6.103515625e-5"),
+	INTEL_UNCORE_EVENT_DESC(data_reads.unit, "MiB"),
 
 	INTEL_UNCORE_EVENT_DESC(data_writes, "event=0x02"),
-	INTEL_UNCORE_EVENT_DESC(data_writes.scale, "64"),
-	INTEL_UNCORE_EVENT_DESC(data_writes.unit, "bytes"),
+	INTEL_UNCORE_EVENT_DESC(data_writes.scale, "6.103515625e-5"),
+	INTEL_UNCORE_EVENT_DESC(data_writes.unit, "MiB"),
 
 	{ /* end: all zeroes */ },
 };