diff options
| author | Peter Zijlstra <a.p.zijlstra@chello.nl> | 2009-06-02 15:52:24 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2009-06-02 16:16:26 +0200 |
| commit | 97124d5e2df5b9eaa5bb684bb1e8ebc7e29d0f5d (patch) | |
| tree | 3fcfeacdaefe0b268984a49ebf018b6c8ebbfe0d /Documentation | |
| parent | f70e87d7a6d9c5a23d5f43ed0a0c224c157ef597 (diff) | |
perf_counter: tools: Better handle existing data files
Provide an argument (-f) to overwrite existing data files.
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
Cc: Marcelo Tosatti <mtosatti@redhat.com>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: John Kacur <jkacur@redhat.com>
LKML-Reference: <new-submission>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/perf_counter/builtin-record.c | 15 |
1 files changed, 12 insertions, 3 deletions
diff --git a/Documentation/perf_counter/builtin-record.c b/Documentation/perf_counter/builtin-record.c index 810fc275ca6..bace7a8edf8 100644 --- a/Documentation/perf_counter/builtin-record.c +++ b/Documentation/perf_counter/builtin-record.c @@ -7,6 +7,7 @@ #include "util/parse-events.h" #include "util/string.h" +#include <unistd.h> #include <sched.h> #define ALIGN(x, a) __ALIGN_MASK(x, (typeof(x))(a)-1) @@ -26,7 +27,7 @@ static unsigned int realtime_prio = 0; static int system_wide = 0; static pid_t target_pid = -1; static int inherit = 1; -static int nmi = 1; +static int force = 0; const unsigned int default_count[] = { 1000000, @@ -337,7 +338,6 @@ static void open_counters(int cpu, pid_t pid) hw_event.config = event_id[counter]; hw_event.irq_period = event_count[counter]; hw_event.record_type = PERF_RECORD_IP | PERF_RECORD_TID; - hw_event.nmi = nmi; hw_event.mmap = track; hw_event.comm = track; hw_event.inherit = (cpu < 0) && inherit; @@ -387,13 +387,20 @@ static int __cmd_record(int argc, const char **argv) int i, counter; pid_t pid; int ret; + struct stat st; page_size = sysconf(_SC_PAGE_SIZE); nr_cpus = sysconf(_SC_NPROCESSORS_ONLN); assert(nr_cpus <= MAX_NR_CPUS); assert(nr_cpus >= 0); - output = open(output_name, O_CREAT|O_EXCL|O_TRUNC|O_RDWR, S_IRUSR|S_IWUSR); + if (!stat(output_name, &st) && !force) { + fprintf(stderr, "Error, output file: %s exists, use -f to overwrite.\n", + output_name); + exit(-1); + } + + output = open(output_name, O_CREAT|O_TRUNC|O_RDWR, S_IRUSR|S_IWUSR); if (output < 0) { perror("failed to create output file"); exit(-1); @@ -473,6 +480,8 @@ static const struct option options[] = { "collect data with this RT SCHED_FIFO priority"), OPT_BOOLEAN('a', "all-cpus", &system_wide, "system-wide collection from all CPUs"), + OPT_BOOLEAN('f', "force", &force, + "overwrite existing data file"), OPT_END() }; |