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taskstats: add a option to send all tasks data to user

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Adds a new taskstats command to share task memory statistics
to userspace. The command works in two modes. It can share
information per pid, and also send the statistics for all
tasks within a given oom_score_adj range.

Change-Id: Iae742ea4f96754022bc634d285c5ce140b32749d
Signed-off-by: Vinayak Menon <vinmenon@codeaurora.org>
[guptap@codeaurora.org: enforce policy later using pre_doit]
Signed-off-by: Prakash Gupta <guptap@codeaurora.org>
This commit is contained in:
Vinayak Menon 2019-02-12 17:03:57 +05:30 • committed by Prakash Gupta
commit acffd6f45a
2 changed files with 204 additions and 1 deletions
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17
include/uapi/linux/taskstats.h
View file

@ -35,6 +35,7 @@
#define TASKSTATS_VERSION 9
#define TASKSTATS2_VERSION 1
#define TS_COMM_LEN 32 /* should be >= TASK_COMM_LEN
* in linux/sched.h */
@ -170,6 +171,19 @@ struct taskstats {
__u64 thrashing_delay_total;
};
struct taskstats2 {
__u16 version;
__s16 oom_score;
__u32 pid;
__u64 anon_rss; /* KB */
__u64 file_rss; /* KB */
__u64 swap_rss; /* KB */
__u64 shmem_rss; /* KB */
#ifdef CONFIG_MM_STAT_UNRECLAIMABLE_PAGES
__u64 unreclaimable; /* KB */
#endif
/* version 1 ends here */
};
/*
* Commands sent from userspace
@ -181,6 +195,7 @@ enum {
TASKSTATS_CMD_UNSPEC = 0, /* Reserved */
TASKSTATS_CMD_GET, /* user->kernel request/get-response */
TASKSTATS_CMD_NEW, /* kernel->user event */
TASKSTATS2_CMD_GET, /* user->kernel request/get-response */
__TASKSTATS_CMD_MAX,
};
@ -194,6 +209,7 @@ enum {
TASKSTATS_TYPE_AGGR_PID, /* contains pid + stats */
TASKSTATS_TYPE_AGGR_TGID, /* contains tgid + stats */
TASKSTATS_TYPE_NULL, /* contains nothing */
TASKSTATS_TYPE_FOREACH, /* contains stats */
__TASKSTATS_TYPE_MAX,
};
@ -205,6 +221,7 @@ enum {
TASKSTATS_CMD_ATTR_TGID,
TASKSTATS_CMD_ATTR_REGISTER_CPUMASK,
TASKSTATS_CMD_ATTR_DEREGISTER_CPUMASK,
TASKSTATS_CMD_ATTR_FOREACH,
__TASKSTATS_CMD_ATTR_MAX,
};