diff options
| -rw-r--r-- | tools/perf/Documentation/perf-top.txt | 5 | ||||
| -rw-r--r-- | tools/perf/builtin-top.c | 2 |
2 files changed, 7 insertions, 0 deletions
diff --git a/tools/perf/Documentation/perf-top.txt b/tools/perf/Documentation/perf-top.txt index 114fda12aa49..d4be6061fe1c 100644 --- a/tools/perf/Documentation/perf-top.txt +++ b/tools/perf/Documentation/perf-top.txt @@ -242,6 +242,11 @@ Default is to monitor all CPUS. --hierarchy:: Enable hierarchy output. +--overwrite:: + This is the default, but for investigating problems with it or any other strange + behaviour like lots of unknown samples, we may want to disable this mode by using + --no-overwrite. + --force:: Don't do ownership validation. diff --git a/tools/perf/builtin-top.c b/tools/perf/builtin-top.c index d21d8751e749..214fad747b04 100644 --- a/tools/perf/builtin-top.c +++ b/tools/perf/builtin-top.c @@ -1372,6 +1372,8 @@ int cmd_top(int argc, const char **argv) "Show raw trace event output (do not use print fmt or plugins)"), OPT_BOOLEAN(0, "hierarchy", &symbol_conf.report_hierarchy, "Show entries in a hierarchy"), + OPT_BOOLEAN(0, "overwrite", &top.record_opts.overwrite, + "Use a backward ring buffer, default: yes"), OPT_BOOLEAN(0, "force", &symbol_conf.force, "don't complain, do it"), OPT_UINTEGER(0, "num-thread-synthesize", &top.nr_threads_synthesize, "number of thread to run event synthesize"), |