diff options
Diffstat (limited to 'tools/perf/util/data.c')
| -rw-r--r-- | tools/perf/util/data.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/tools/perf/util/data.c b/tools/perf/util/data.c index fc16299c91..c29d8a382b 100644 --- a/tools/perf/util/data.c +++ b/tools/perf/util/data.c @@ -17,6 +17,7 @@ #include "util.h" // rm_rf_perf_data() #include "debug.h" #include "header.h" +#include "rlimit.h" #include <internal/lib.h> static void close_dir(struct perf_data_file *files, int nr) @@ -35,6 +36,7 @@ void perf_data__close_dir(struct perf_data *data) int perf_data__create_dir(struct perf_data *data, int nr) { + enum rlimit_action set_rlimit = NO_CHANGE; struct perf_data_file *files = NULL; int i, ret; @@ -54,11 +56,21 @@ int perf_data__create_dir(struct perf_data *data, int nr) goto out_err; } +retry_open: ret = open(file->path, O_RDWR|O_CREAT|O_TRUNC, S_IRUSR|S_IWUSR); if (ret < 0) { + /* + * If using parallel threads to collect data, + * perf record needs at least 6 fds per CPU. + * When we run out of them try to increase the limits. + */ + if (errno == EMFILE && rlimit__increase_nofile(&set_rlimit)) + goto retry_open; + ret = -errno; goto out_err; } + set_rlimit = NO_CHANGE; file->fd = ret; } |