diff options
| -rw-r--r-- | init/Kconfig | 4 | ||||
| -rw-r--r-- | tools/perf/builtin-record.c | 2 | ||||
| -rw-r--r-- | tools/perf/builtin-top.c | 2 |
3 files changed, 4 insertions, 4 deletions
diff --git a/init/Kconfig b/init/Kconfig index f515864..9e03ef8 100644 --- a/init/Kconfig +++ b/init/Kconfig @@ -937,7 +937,7 @@ config PERF_EVENTS Enable kernel support for various performance events provided by software and hardware. - Software events are supported either build-in or via the + Software events are supported either built-in or via the use of generic tracepoints. Most modern CPUs support performance events via performance @@ -949,7 +949,7 @@ config PERF_EVENTS used to profile the code that runs on that CPU. The Linux Performance Event subsystem provides an abstraction of - these software and hardware cevent apabilities, available via a + these software and hardware event capabilities, available via a system call and used by the "perf" utility in tools/perf/. It provides per task and per CPU counters, and it provides event capabilities on top of those. diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c index 3eeef33..a4be453 100644 --- a/tools/perf/builtin-record.c +++ b/tools/perf/builtin-record.c @@ -426,7 +426,7 @@ try_again: if (fd[nr_cpu][counter] < 0) { int err = errno; - if (err == EPERM) + if (err == EPERM || err == EACCES) die("Permission error - are you root?\n"); else if (err == ENODEV && profile_cpu != -1) die("No such device - did you specify an out-of-range profile CPU?\n"); diff --git a/tools/perf/builtin-top.c b/tools/perf/builtin-top.c index a1b1d10..e23bc74 100644 --- a/tools/perf/builtin-top.c +++ b/tools/perf/builtin-top.c @@ -1027,7 +1027,7 @@ try_again: if (fd[i][counter] < 0) { int err = errno; - if (err == EPERM) + if (err == EPERM || err == EACCES) die("No permission - are you root?\n"); /* * If it's cycles then fall back to hrtimer |
