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Commit d402af84 authored by Jasleen Kalsi's avatar Jasleen Kalsi Committed by Gerrit - the friendly Code Review server
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taskstats: extended taskstats2 with acct fields 



Add basic accounting stats in taskstats2 struct

Change-Id: Ieb5aa751381f889628eba143db3988a56ef0f096
Signed-off-by: default avatarJasleen Kalsi <jkalsi@codeaurora.org>
parent 17d718ca

include/uapi/linux/taskstats.h

+15 −1
Original line number Diff line number Diff line
@@ -35,7 +35,7 @@ 




#define TASKSTATS_VERSION	9

#define TASKSTATS2_VERSION	1

#define TASKSTATS2_VERSION	2

#define TS_COMM_LEN		32	/* should be >= TASK_COMM_LEN

					 * in linux/sched.h */
@@ -181,6 +181,20 @@ struct taskstats2 { 
	__u64 shmem_rss;	/* KB */

	__u64 unreclaimable;	/* KB */

	/* version 1 ends here */



	/* version 2 begins here */

	__u64	utime;		/* User CPU time [usec] */

	__u64	stime;		/* System CPU time [usec] */

	__u64	cutime;		/* Cumulative User CPU time [usec] */

	__u64	cstime;		/* Cumulative System CPU time [usec] */



	__u32	uid __attribute__((aligned(8)));

					/* User ID */

	__u32	ppid;  /* Parent process ID */

	char	name[TS_COMM_LEN];  /* Command name */

	char    state[TS_COMM_LEN]; /* Process state */

	/* version 2 ends here*/



};



/*

kernel/taskstats.c

+34 −0
Original line number Diff line number Diff line
@@ -650,6 +650,11 @@ static int taskstats2_cmd_attr_pid(struct genl_info *info) 
	size_t size;

	u32 pid;

	int rc;

	u64 utime, stime;

	const struct cred *tcred;

	struct cgroup_subsys_state *css;

	unsigned long flags;

	struct signal_struct *sig;



	size = nla_total_size_64bit(sizeof(struct taskstats2));
@@ -691,6 +696,35 @@ static int taskstats2_cmd_attr_pid(struct genl_info *info) 
#undef K

		task_unlock(p);

	}



	/* version 2 fields begin here */

	task_cputime(tsk, &utime, &stime);

	stats->utime = div_u64(utime, NSEC_PER_USEC);

	stats->stime = div_u64(stime, NSEC_PER_USEC);



	if (lock_task_sighand(tsk, &flags)) {

		sig = tsk->signal;

		stats->cutime = sig->cutime;

		stats->cstime = sig->cstime;

		unlock_task_sighand(tsk, &flags);

	}



	rcu_read_lock();

	tcred = __task_cred(tsk);

	stats->uid = from_kuid_munged(current_user_ns(), tcred->uid);

	stats->ppid = pid_alive(tsk) ?

		task_tgid_nr_ns(rcu_dereference(tsk->real_parent),

			task_active_pid_ns(current)) : 0;

	rcu_read_unlock();



	strlcpy(stats->name, tsk->comm, sizeof(stats->name));



	css = task_get_css(tsk, cpuset_cgrp_id);

	cgroup_path_ns(css->cgroup, stats->state, sizeof(stats->state),

				current->nsproxy->cgroup_ns);

	css_put(css);

	/* version 2 fields end here */



	put_task_struct(tsk);



	return send_reply(rep_skb, info);