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不器用で落着きのない技術者のメモ

Amazon Linux 2 に Tanel Poder の 0x.tools をインストールする

インストール

sudo yum -y install git gcc
git clone https://github.com/tanelpoder/0xtools
cd 0xtools/
make
sudo make install

使ってみる

  • 適当にプロセスを実行する。
$ yes >> /dev/null &
[1] 26464
$ psn -p 26464 -G syscall,filename

Linux Process Snapper v0.18 by Tanel Poder [https://0x.tools]
Sampling /proc/syscall, stat for 5 seconds... finished.


=== Active Threads ======================================================

 samples | avg_threads | comm  | state            | syscall   | filename
-------------------------------------------------------------------------
     100 |        1.00 | (yes) | Running (ON CPU) | [running] |


samples: 100 (expected: 100)
total processes: 1, threads: 1
runtime: 5.00, measure time: 0.08
  • schedlat
$ schedlat 26464
SchedLat by Tanel Poder [https://0x.tools]

PID=26464 COMM=yes

TIMESTAMP              %CPU   %LAT   %SLP
2020-11-29 15:20:39   100.3    0.0   -0.3
2020-11-29 15:20:40    99.9    0.0    0.1
2020-11-29 15:20:41    99.9    0.0    0.1
2020-11-29 15:20:42   100.3    0.0   -0.3
2020-11-29 15:20:43    99.9    0.0    0.1
2020-11-29 15:20:44    99.9    0.0    0.1
2020-11-29 15:20:45    99.9    0.0    0.1
2020-11-29 15:20:46   100.3    0.0   -0.3
^CTraceback (most recent call last):
  File "/usr/bin/schedlat", line 36, in <module>
    time.sleep(1)
KeyboardInterrupt
  • xcapture
$ xcapture -c exe,kstack

0xTools xcapture v1.0 by Tanel Poder [https://0x.tools]

Sampling /proc...

DATE       TIME             PID     TID USERNAME        ST COMMAND                   SYSCALL                   WCHAN                     EXE                  KSTACK
2020-11-29 15:23:31.240   26464   26464 ec2-user        R  (yes)                     [running]                 0                         yes

DATE       TIME             PID     TID USERNAME        ST COMMAND                   SYSCALL                   WCHAN                     EXE                  KSTACK
2020-11-29 15:23:32.244   26464   26464 ec2-user        R  (yes)                     [running]                 0                         yes

DATE       TIME             PID     TID USERNAME        ST COMMAND                   SYSCALL                   WCHAN                     EXE                  KSTACK
2020-11-29 15:23:33.248   26464   26464 ec2-user        R  (yes)                     [running]                 0                         yes

環境

$ cat /etc/system-release
Amazon Linux release 2 (Karoo)
$ uname -r
4.14.193-149.317.amzn2.x86_64