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authorArjan van de Ven <arjan@linux.intel.com>2008-09-13 09:36:06 -0700
committerIngo Molnar <mingo@elte.hu>2008-10-14 10:38:46 +0200
commitaa5d9151f745b6ee6a236a1f109118034277eb92 (patch)
tree3b0660685ba60cf2401e70eba4572ed2691c817d /init/main.c
parent1b7ae37c030a9fbbb5ebbf5d7bbfd7208cf805b7 (diff)
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tracing/fastboot: add a script to visualize the kernel boot process / time
When optimizing the kernel boot time, it's very valuable to visualize what is going on at which time. In addition, with the fastboot asynchronous initcall level, it's very valuable to see which initcall gets run where and when. This patch adds a script to turn a dmesg into a SVG graph (that can be shown with tools such as InkScape, Gimp or Firefox) and a small change to the initcall code to print the PID of the thread calling the initcall (so that the script can work out the parallelism). Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
Diffstat (limited to 'init/main.c')
-rw-r--r--init/main.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/init/main.c b/init/main.c
index ded1fae965a..16abba05c82 100644
--- a/init/main.c
+++ b/init/main.c
@@ -711,7 +711,8 @@ int do_one_initcall(initcall_t fn)
int result;
if (initcall_debug) {
- printk("calling %pF\n", fn);
+ printk("calling %pF", fn);
+ printk(" @ %i\n", task_pid_nr(current));
t0 = ktime_get();
}