From 4bf2364a951d3c043e132e4451d90c7bc74dee83 Mon Sep 17 00:00:00 2001 From: Frederic Weisbecker Date: Mon, 17 Aug 2009 23:07:49 +0200 Subject: perf tools: Warn while running perf trace without sample When a user runs perf trace using an input with logged counters without PERF_SAMPLE_RAW attribute, warn by giving a nice tip. Signed-off-by: Frederic Weisbecker Cc: Peter Zijlstra Cc: Arnaldo Carvalho de Melo Cc: Mike Galbraith Cc: Steven Rostedt LKML-Reference: <1250543271-8383-2-git-send-email-fweisbec@gmail.com> Signed-off-by: Ingo Molnar --- tools/perf/builtin-trace.c | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'tools') diff --git a/tools/perf/builtin-trace.c b/tools/perf/builtin-trace.c index b160a9f61bf..88eef71bce6 100644 --- a/tools/perf/builtin-trace.c +++ b/tools/perf/builtin-trace.c @@ -184,6 +184,10 @@ static int __cmd_trace(void) header = perf_header__read(input); sample_type = perf_header__sample_type(header); + if (!(sample_type & PERF_SAMPLE_RAW)) + die("No trace sample to read. Did you call perf record " + "without -R?"); + if (load_kernel() < 0) { perror("failed to load kernel symbols"); return EXIT_FAILURE; -- cgit v1.2.3