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taskstats doesn't work, probably caused by when I switched it from
using system/core/libnl_2 to external/libnl. Fix a few bugs that
libnl_2 didn't care about:
- callbacks must be registered with NL_CB_CUSTOM
- nla_next is not guaranteed to work if !nla_ok, use nla_for_each_attr
which does the right thing
- instead of fixing get_family_id, use genl_ctrl_resolve
- instead of manually setting pid, seq, and flags, use
nl_send_auto_complete
- since there is now only one command sent, get rid of send_command
and take advantage of the known parameter type to use nla_put_u32
- libnl does not set errno, return nl error codes and use nl_perror
instead of perror
Change-Id: Ic631c8c1d9cc6ed288cbbeb6fe40c45ca5fe9143
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Fix warnings on arm64 build
Change-Id: Icc1b497361e8f532f10c850fb0bf5e3fa22249b5
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libnl_2 has been replaced with libnl.
Change-Id: Ie96a92c3a77a1a4dcbf0646b1a8f41659f0027e8
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Change-Id: I52f4acaab3e2dcd59c23701f60ac12fed40828c6
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Add a tool for querying and printing out the kernel's taskstats
structure. This structure contains various profiling information about a
given process or thread group.
Sample output:
Basic task statistics
---------------------
Stats version: 8
Exit code: 0
Flags: 0x2
Nice value: 0
Command name: init
Scheduling discipline: 0
UID: 0
GID: 0
PID: 1
PPID: 0
Begin time: Fri Sep 20 17:06:14 2013
Elapsed time: 611384577 usec
User CPU time: 980000 usec
Minor page faults: 515
Major page faults: 0
Scaled user time: 980000 usec
Scaled system time: 2590000 usec
Delay accounting
----------------
Count Delay (ms) Average delay Real delay Scaled real Virtual delay
CPU 1101 90.615 0.082 3570.000 3570.000 3620.204
IO 45 50.155 1.115
Swap 0 0.000 0.000
Reclaim 0 0.000 0.000
Extended accounting fields
--------------------------
Average RSS usage: 0.348 MB
Average VM usage: 0.727 MB
RSS high water mark: 548 KB
VM high water mark: 688 KB
IO bytes read: 330752
IO bytes written: 979968
IO read syscalls: 17408
IO write syscalls: 0
Per-task/thread statistics
--------------------------
Voluntary switches: 768
Involuntary switches: 333
Change-Id: I4dab68d98de5db0f9112bec014872a067684f799
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