diff options
Diffstat (limited to 'tools/perf/util/data.c')
| -rw-r--r-- | tools/perf/util/data.c | 22 |
1 files changed, 16 insertions, 6 deletions
diff --git a/tools/perf/util/data.c b/tools/perf/util/data.c index fc16299c915f..08c4bfbd817f 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; } @@ -401,7 +413,7 @@ ssize_t perf_data_file__write(struct perf_data_file *file, } ssize_t perf_data__write(struct perf_data *data, - void *buf, size_t size) + void *buf, size_t size) { if (data->use_stdio) { if (fwrite(buf, size, 1, data->file.fptr) == 1) @@ -412,14 +424,12 @@ ssize_t perf_data__write(struct perf_data *data, } int perf_data__switch(struct perf_data *data, - const char *postfix, - size_t pos, bool at_exit, - char **new_filepath) + const char *postfix, + size_t pos, bool at_exit, + char **new_filepath) { int ret; - if (check_pipe(data)) - return -EINVAL; if (perf_data__is_read(data)) return -EINVAL; |