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Message-Id: <20070919232054.77c271aa.akpm@linux-foundation.org>
Date: Wed, 19 Sep 2007 23:20:54 -0700
From: Andrew Morton <akpm@...ux-foundation.org>
To: Guillaume Chazarain <guichaz@...oo.fr>
Cc: balbir@...ux.vnet.ibm.com, Jonathan Lim <jlim@....com>,
Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
Jay Lan <jlan@...ulhu.engr.sgi.com>,
Oleg Nesterov <oleg@...sign.ru>,
Michael Neuling <mikey@...ling.org>
Subject: Re: Add all thread stats for TASKSTATS_CMD_ATTR_TGID (v5)
On Tue, 18 Sep 2007 00:23:39 +0200 Guillaume Chazarain <guichaz@...oo.fr> wrote:
> TASKSTATS_CMD_ATTR_TGID used to return only the delay accounting stats, not
> the basic and extended accounting. With this patch,
> TASKSTATS_CMD_ATTR_TGID also aggregates the accounting info for all threads
> of a thread group. This makes TASKSTATS_CMD_ATTR_TGID usable in a similar
> fashion to TASKSTATS_CMD_ATTR_PID, for commands like iotop -P
> (http://guichaz.free.fr/misc/iotop.py).
This patch conflicts somewhat with
add-scaled-time-to-taskstats-based-process-accounting.patch
I fixed it up like this:
void bacct_add_tsk(struct taskstats *stats, struct task_struct *task)
{
if (task->flags & PF_SUPERPRIV)
stats->ac_flag |= ASU;
if (task->flags & PF_DUMPCORE)
stats->ac_flag |= ACORE;
if (task->flags & PF_SIGNALED)
stats->ac_flag |= AXSIG;
if (thread_group_leader(task) && (task->flags & PF_FORKNOEXEC))
/*
* Threads are created by do_fork() and don't exec but not in
* the AFORK sense, as the latter involves fork(2).
*/
stats->ac_flag |= AFORK;
stats->ac_utimescaled +=
cputime_to_msecs(task->utimescaled) * USEC_PER_MSEC;
stats->ac_stimescaled +=
cputime_to_msecs(task->stimescaled) * USEC_PER_MSEC;
stats->ac_utime += cputime_to_msecs(task->utime) * USEC_PER_MSEC;
stats->ac_stime += cputime_to_msecs(task->stime) * USEC_PER_MSEC;
stats->ac_minflt += task->min_flt;
stats->ac_majflt += task->maj_flt;
}
(note the s/=/+=/ in there) but it all needs reviewing and checking and
testing please.
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