perf tools: Use 64-bit shifts with (TSC) time conversion

Commit b9511cd761fa ("perf/x86: Fix time_shift in perf_event_mmap_page")
altered the time conversion algorithms documented in the perf_event.h
header file, to use 64-bit shifts.  That was done to make the code more
future-proof (i.e. some time in the future a 32-bit shift could be
allowed).  Reflect those changes in perf tools.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/1457005856-6143-9-git-send-email-adrian.hunter@intel.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>

diff --git a/tools/perf/arch/x86/tests/rdpmc.c b/tools/perf/arch/x86/tests/rdpmc.c
index 7945462..72193f1 100644 (file)
--- a/tools/perf/arch/x86/tests/rdpmc.c
+++ b/tools/perf/arch/x86/tests/rdpmc.c
@@ -59,7 +59,7 @@ static u64 mmap_read_self(void *addr)
                u64 quot, rem;
 
                quot = (cyc >> time_shift);
-               rem = cyc & ((1 << time_shift) - 1);
+               rem = cyc & (((u64)1 << time_shift) - 1);
                delta = time_offset + quot * time_mult +
                        ((rem * time_mult) >> time_shift);
 

diff --git a/tools/perf/util/tsc.c b/tools/perf/util/tsc.c
index 4d4210d..1b74164 100644 (file)
--- a/tools/perf/util/tsc.c
+++ b/tools/perf/util/tsc.c
@@ -19,7 +19,7 @@ u64 tsc_to_perf_time(u64 cyc, struct perf_tsc_conversion *tc)
        u64 quot, rem;
 
        quot = cyc >> tc->time_shift;
-       rem  = cyc & ((1 << tc->time_shift) - 1);
+       rem  = cyc & (((u64)1 << tc->time_shift) - 1);
        return tc->time_zero + quot * tc->time_mult +
               ((rem * tc->time_mult) >> tc->time_shift);
 }