Realloc td->files to full size immediately

For adding many files, we do as many reallocs() as we have files. This is
slow, so do full allocs instead.

Signed-off-by: Jens Axboe <jens.axboe@oracle.com>

diff --git a/filesetup.c b/filesetup.c
index 088b77c3f566df9e7490000747de71e310c6ddfd..461f130c15272acc22b2f50a6a714067baea2000 100644 (file)
--- a/filesetup.c
+++ b/filesetup.c
@@ -714,10 +714,15 @@ int add_file(struct thread_data *td, const char *fname)
                
        f->fd = -1;
 
-       dprint(FD_FILE, "resize file array to %d files\n", cur_files + 1);
+       if (td->files_size <= td->files_index) {
+               int new_size = td->o.nr_files;
 
-       td->files = realloc(td->files, (cur_files + 1) * sizeof(f));
-       td->files[cur_files] = f;
+               dprint(FD_FILE, "resize file array to %d files\n", new_size);
+
+               td->files = realloc(td->files, new_size * sizeof(f));
+               td->files[cur_files] = f;
+               td->files_size = new_size;
+       }
 
        /*
         * init function, io engine may not be loaded yet