Health-check Overview
The health-check tool monitors processes such as CPU usage, System call activity, Network connections and more to help you identify areas where it is consuming too many resources. It offers you the option to trace one or more processes and save the stats into a JSON formatted file for later analysis. At the moment I am writing this article only x86 (32 and 64 bit) and ARM architectures are supported.
Health-check can monitor:
– CPU usage
– Kernel wake-up events
– File I/O activity (open,read,write,close)
– System call activity
– Excessive polling of timeout wait blocked system calls (such as poll, select, etc)
– Memory usage (such as heap and stack growth)
– Network connections (to spot rogue internet activity)
Install Health-check On Ubuntu
sudo add-apt-repository ppa:colin-king/white sudo apt-get update sudo apt-get install health-check
Usage:
health-check [options] [command [options]]
Options:
-b         brief (terse) output -c         find all child processes on start-up (only useful with -p option) -d         specify the analysis duration in seconds (default is 60 seconds) -f        follow fork/vfork/clone system calls -h         show this help -p pid[,pid] specify process id(s) or process name(s) to be traced -m max    specify maximum number of system calls to trace (default is 1000000) -o file     output results to a json data file -r         resolve IP addresses -u user    run command as a specified user -v        verbose output -w        monitor wakelock count -W        monitor wakelock usage (has overhead)
Test Health Check Using Application Name
Here i want to check the firefox health status. Enter the following command in Terminal. The firefox will be automatically open. After a minutes close firefox. The health check result will be shown on Terminal.
$ sudo health-check -b firefox
Sample output:
CPU usage:  User: 13.91%, System:  8.29%, Total: 22.20% (medium load) Wakeups:  No wakeups detected. Context Switches:  7116.76 context switches/sec (high) File I/O operations:  I/O Operations per second: 188.26 open, 188.26 close, 163.40 read, 0.59 write Polling system call analysis:  firefox (10098), poll:         30 immediate timed out calls with zero timeout (non-blocking peeks)         10 repeated immediate timed out polled calls with zero timeouts (heavy polling peeks) Filesystem Syncs:  None. Change in memory (K/second):  PID Process             Type       Size      RSS      PSS  10098 firefox             Stack   9703.33    52.10    52.10 (growing very fast)  10098 firefox             Heap   14836.21  3888.44  3888.44 (growing very fast)  10098 firefox             Mapped 165303.52 11130.12  4908.20 (growing very fast) Open Network Connections:  None. Analysis ran for just 3.3782 seconds, so rate calculations may be misleading
Test Health Check using PID
Enter the following command along with PID. You can find the PID using “top” command.
$ sudo health-check -p 9382
Sample output:
 CPU usage:  PID Process               USR%  SYS% TOTAL%  Duration  9382 firefox              21.92  3.38 25.30     60.00 (medium load) Wakeups:  PID Process              Wake/Sec Kernel Functions  9382 firefox                  0.97 (hrtimer_start_range_ns, ehci_hrtimer_func) (low)  9382 firefox                  0.08 (hrtimer_start_range_ns, hrtimer_wakeup) (very low)  Total                          1.05 Context Switches:  PID Process               Voluntary  Involuntary    Total                             Ctxt Sw/Sec Ctxt Sw/Sec Ctxt Sw/Sec  9382 firefox                  3929.55       41.40     3970.95 (high) File I/O operations:  PID Process              Count Op Filename  9382 firefox                184   R /home/sk/.mozilla/firefox/543j5fpy.default/content-prefs.sqlite  9382 firefox                119   W /home/sk/.mozilla/firefox/543j5fpy.default/cookies.sqlite-wal  9382 firefox                 10   C /usr/share/fonts/truetype/msttcorefonts/Arial_Bold.ttf  9382 firefox                 10   O /home/sk/.mozilla/firefox/543j5fpy.default/sessionstore.js.tmp  9382 firefox                  2  CR /etc/hosts  9382 firefox                  1 OCR /etc/hosts  9382 firefox                  1  RW /home/sk/.mozilla/firefox/543j5fpy.default/cookies.sqlite-wal  9382 firefox                  1  CW /home/sk/.mozilla/firefox/543j5fpy.default/sessionstore.js.tmp  Total                        328  Op: O=Open, R=Read, W=Write, C=Close File I/O Operations per second:  PID Process                Open  Close   Read  Write  9382 firefox                0.18   0.23   3.13   2.02 System calls traced:  PID Process             Syscall              Count   Rate/Sec  9382 firefox             recvfrom             49658    827.6329  9382 firefox             poll                 37694    628.2330  9382 firefox             writev               11145    185.7499  9382 firefox             futex                 5235     87.2500  9382 firefox             read                  3873     64.5500  9382 firefox             madvise               2944     49.0666  9382 firefox             write                  210      3.5000  9382 firefox             munmap                 108      1.8000  9382 firefox             stat                    86      1.4333  9382 firefox             mmap                    83      1.3833  9382 firefox             getrusage               80      1.3333  9382 firefox             getsockname             21      0.3500  9382 firefox             fcntl                    5      0.0833  9382 firefox             close                    5      0.0833  9382 firefox             open                     5      0.0833  9382 firefox             fstat                    5      0.0833  9382 firefox             restart_syscall          1      0.0167  9382 firefox             lseek                    1      0.0167  Total                                          111159   1852.6491 Top polling system calls:  PID Process             Syscall            Rate/Sec  Infinite  Zero    Minimum   Maximum   Average                                                           Timeouts Timeouts  Timeout   Timeout   Timeout  9382 firefox             poll                 628.2330   23395   12627  0.0 sec 500.0 msec 18.5 msec Distribution of poll timeout times:                                                            10.0 100.0   1.0  10.0 100.0   1.0  10.0 100.0                                                    up to   to    to    to    to    to    to    to or more                                              Zero   9.9  99.9 999.9   9.9  99.9 999.9   9.9  99.9       Infinite  PID Process             Syscall           sec  usec  usec  usec  msec  msec  msec   sec   sec   sec  Wait  9382 firefox             poll            12627    -     -     -      6    54  1612    -     -     -  23395 Polling system call analysis:  firefox (9382), poll:      11793 immediate timed out calls with zero timeout (non-blocking peeks)       7660 repeated immediate timed out polled calls with zero timeouts (heavy polling peeks) Filesystem Syncs:  None. Per Process Memory (K):  PID Process             Type       Size      RSS      PSS  9382 firefox             Stack    410408    79896    79896  9382 firefox             Heap     631808   316412   316412  9382 firefox             Mapped   732344    58324    43355 Change in memory (K/second):  PID Process             Type       Size      RSS      PSS  9382 firefox             Stack      0.00   -40.73   -40.73 (shrinking moderately fast)  9382 firefox             Heap    -313.60 -1428.60 -1428.60 (shrinking very fast)  9382 firefox             Mapped   -16.60    -2.53    -1.33 (shrinking moderately fast) Open Network Connections:  PID Process            Proto Address:Port  9382 firefox             UDP  127.0.1.1:53  9382 firefox             TCP  37.59.47.177:443  9382 firefox             TCP  198.50.164.162:80  9382 firefox             TCP  184.173.90.195:80
For more details about health-check, refer the man pages.
$ man health-check
