Re: @defined in schedtimes.stp

[Joachim Worringen <worringen at gmail dot com>]

Am 03.11.2010 11:36, schrieb Mark Wielaard:
> I don't know of any official rpm archives.
> But in theory the following should just work:
>
> wget http://sourceware.org/systemtap/ftp/releases/systemtap-1.3.tar.gz
> tar zxf systemtap-1.3.tar.gz
> cd systemtap-1.3
> ./configure --prefix=/usr/local/systemtap
> make
> sudo make install
>
> And then just use the stap binary from /usr/local/systemtap/bin

Works perfectly this way. Is it generally sufficient to just install the 
kernel-debuginfo packages, and then the systemtap tarball?

[root@x8dth-1 systemtap]# /usr/local/systemtap/bin/stap schedtimes.stp
all mode
        execname:    pid    run(us)  sleep(us) io_wait(us) queued(us) 
total(us)

            init:      1          6    3549288          0          3 
 3549297
     migration/0:      2          3    3027334          0          3
....

Now for the results: what I want to figure out with this script is 
whether there are situations where a thread (user space, in my case) 
wants to run, but has to wait to be scheduled on a CPU. This should 
exactly be what the "queued" column contains, right?

 thanks, Joachim