core: if the bootloader supports it, determine firmware and boot loader delay

This allows us to print simple performance data of all parts of the boot now:

- firmware
- boot loader
- kernel
- initrd
- userspace

This only works for bootloaders which support passing TSC data via EFI
variables. As of now that's only gummiboot.

1 files changed, 47 insertions, 0 deletions

diff --git a/src/test/test-efivars.c b/src/test/test-efivars.c
new file mode 100644
index 0000000000..e54a83665a
--- /dev/null
+++ b/src/test/test-efivars.c
@@ -0,0 +1,47 @@
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
+/***
+  This file is part of systemd.
+
+  Copyright 2013 Lennart Poettering
+
+  systemd is free software; you can redistribute it and/or modify it
+  under the terms of the GNU Lesser General Public License as published by
+  the Free Software Foundation; either version 2.1 of the License, or
+  (at your option) any later version.
+
+  systemd is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public License
+  along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include "util.h"
+#include "log.h"
+#include "efivars.h"
+
+int main(int argc, char* argv[]) {
+        char s[MAX(FORMAT_TIMESPAN_MAX, FORMAT_TIMESTAMP_MAX)];
+        int r;
+        dual_timestamp fw, l, k;
+
+        dual_timestamp_from_monotonic(&k, 0);
+
+        r = efi_get_boot_timestamps(NULL, &fw, &l);
+        if (r < 0) {
+                log_error("Failed to read variables: %s", strerror(-r));
+                return 1;
+        }
+
+        log_info("Firmware began %s before kernel.", format_timespan(s, sizeof(s), fw.monotonic));
+        log_info("Loader began %s before kernel.", format_timespan(s, sizeof(s), l.monotonic));
+
+        log_info("Firmware began %s.", format_timestamp(s, sizeof(s), fw.realtime));
+        log_info("Loader began %s.", format_timestamp(s, sizeof(s), l.realtime));
+        log_info("Kernel began %s.", format_timestamp(s, sizeof(s), k.realtime));
+
+        return 0;
+}