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| author | Tim Bird <tim.bird@am.sony.com> | 2008-10-09 15:23:05 -0700 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-10-14 10:39:27 +0200 |
| commit | ca538f6bbe583406f941f3041d40c41f9a13d1de (patch) | |
| tree | 460e3cf96472e327b48befbb4836c2d40e46f937 /include | |
| parent | ad0a3b68114e8f3c25ac0045b45a2838f23e3b3a (diff) | |
| download | linux-ca538f6bbe583406f941f3041d40c41f9a13d1de.tar.gz linux-ca538f6bbe583406f941f3041d40c41f9a13d1de.tar.bz2 linux-ca538f6bbe583406f941f3041d40c41f9a13d1de.zip | |
tracing/fastboot: add better resolution to initcall debug/tracing
Change the time resolution for initcall_debug to microseconds, from
milliseconds. This is handy to determine which initcalls you want to work
on for faster booting.
One one of my test machines, over 90% of the initcalls are less than a
millisecond and (without this patch) these are all reported as 0 msecs.
Working on the 900 us ones is more important than the 4 us ones.
With 'quiet' on the kernel command line, this adds no significant overhead
to kernel boot time.
Signed-off-by: Tim Bird <tim.bird@am.sony.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/ftrace.h | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/include/linux/ftrace.h b/include/linux/ftrace.h index 5812dba4ee24..a3d46151be19 100644 --- a/include/linux/ftrace.h +++ b/include/linux/ftrace.h @@ -215,9 +215,9 @@ ftrace_init_module(unsigned long *start, unsigned long *end) { } struct boot_trace { pid_t caller; - char func[KSYM_NAME_LEN]; + char func[KSYM_NAME_LEN]; int result; - unsigned long long duration; + unsigned long long duration; /* usecs */ ktime_t calltime; ktime_t rettime; }; |