From 30c806a094493beb7691bc7957dfa02dee96230a Mon Sep 17 00:00:00 2001 From: Ingo Molnar Date: Sun, 7 Jun 2009 17:46:24 +0200 Subject: perf_counter tools: Handle kernels with !CONFIG_PERF_COUNTER If perf is run on a !CONFIG_PERF_COUNTER kernel right now it bails out with no messages or with confusing messages. Standardize this case some more and explain the situation. Cc: Peter Zijlstra Cc: Mike Galbraith Cc: Paul Mackerras Cc: Arnaldo Carvalho de Melo LKML-Reference: Signed-off-by: Ingo Molnar --- tools/perf/builtin-record.c | 7 ++++--- tools/perf/builtin-top.c | 8 ++++---- 2 files changed, 8 insertions(+), 7 deletions(-) (limited to 'tools') diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c index 87866294a0e6..deaee42d5eb0 100644 --- a/tools/perf/builtin-record.c +++ b/tools/perf/builtin-record.c @@ -356,9 +356,6 @@ try_again: if (fd[nr_cpu][counter] < 0) { int err = errno; - if (verbose) - error("sys_perf_counter_open() syscall returned with %d (%s)\n", - fd[nr_cpu][counter], strerror(err)); if (err == EPERM) die("Permission error - are you root?\n"); @@ -376,6 +373,10 @@ try_again: attr->config = PERF_COUNT_CPU_CLOCK; goto try_again; } + printf("\n"); + error("perfcounter syscall returned with %d (%s)\n", + fd[nr_cpu][counter], strerror(err)); + die("No CONFIG_PERF_COUNTERS=y kernel support configured?\n"); exit(-1); } diff --git a/tools/perf/builtin-top.c b/tools/perf/builtin-top.c index 1f8c97d5c32e..be1698f1189b 100644 --- a/tools/perf/builtin-top.c +++ b/tools/perf/builtin-top.c @@ -551,10 +551,6 @@ try_again: if (fd[i][counter] < 0) { int err = errno; - if (verbose) - error("sys_perf_counter_open() syscall returned with %d (%s)\n", - fd[i][counter], strerror(err)); - if (err == EPERM) die("No permission - are you root?\n"); /* @@ -572,6 +568,10 @@ try_again: attr->config = PERF_COUNT_CPU_CLOCK; goto try_again; } + printf("\n"); + error("perfcounter syscall returned with %d (%s)\n", + fd[i][counter], strerror(err)); + die("No CONFIG_PERF_COUNTERS=y kernel support configured?\n"); exit(-1); } assert(fd[i][counter] >= 0); -- cgit v1.2.3