サンプルプログラム集

Python

memcurses.py

curses (libcurses) を利用した /proc/meminfo の変化量を表示するスクリプト。

ソースコード <toggledisplay>

#!/usr/bin/env python
import sys, time, curses

def main(argv):
    win = curses.initscr()
    if len(argv) > 1:
        interval = int(argv[1])
    else:
        interval = 1

    f = open("/proc/meminfo", "r")
    prev = []
    while True:
        win.clear()
        win.addstr(0, 0, "Every %d.0s : %s" % (interval, time.ctime()))
        i = 0
        try:
            for line in f:
                win.addstr(i+2, 0, line[:-1])
                cur = line.split()[1]
                try:
                    if cur != prev[i]:
                        win.addstr(" %+d" % (int(cur) - int(prev[i])))
                        prev[i] = cur
                except IndexError:
                    prev.append(cur)
                i += 1
            win.addstr("\n")
            win.refresh()
            f.seek(0)
            time.sleep(interval)
        except KeyboardInterrupt:
            break

    curses.endwin()
    f.close()
    return 0

if __name__ == "__main__":
    sys.exit(main(sys.argv))

</toggledisplay>

実行例 <toggledisplay>

$ ./memcurses.py 5
Every 5.0s : Sat Feb 26 01:06:31 2011

MemTotal:      5968984 kB
MemFree:        458472 kB
Buffers:        292224 kB +8
Cached:        4135716 kB
SwapCached:          0 kB
Active:        2248520 kB +44
Inactive:      2798728 kB
HighTotal:     5241152 kB
HighFree:       449732 kB
LowTotal:       727832 kB
LowFree:          8740 kB
SwapTotal:     6144852 kB
SwapFree:      6144716 kB
Dirty:             456 kB
Writeback:           0 kB
AnonPages:      619336 kB +32
Mapped:        1179140 kB +112
Slab:           111936 kB -44
PageTables:      12296 kB +52
NFS_Unstable:        0 kB
Bounce:              0 kB
CommitLimit:   9129344 kB
Committed_AS:  1629408 kB
VmallocTotal:   116728 kB
VmallocUsed:     19364 kB
VmallocChunk:    97136 kB
HugePages_Total:     0
HugePages_Free:      0
HugePages_Rsvd:      0
Hugepagesize:     2048 kB

</toggledisplay>

calc_buddy.py

/proc/buddyinfo のそれぞれのゾーンの合計サイズを計算するスクリプト。 タイムスタンプを付けて記録したファイルにも対応。

ソースコード <toggledisplay>

#!/usr/bin/env python
import sys

if len(sys.argv) == 1:
    files = [ open('/proc/buddyinfo', 'r') ]
    ts_shift = 4;
else:
    files = [ open(f) for f in sys.argv[1:] ]
    ts_shift = 6;

for file in files:
    for line in file:
        if len(line) > 1:
            print line[:-1],
            fields = line.split()
            total = 0
            for val in range(0,11):
                total += int(fields[ts_shift + val]) * 4 * 2**val
            print total, "KB"
        else:
            print line,
    file.close()
</toggledisplay>

実行例 <toggledisplay>

$ ./calc_buddy.py 
Node 0, zone      DMA     46      5      3      0      0      0      0      1      1      1      0  3856 KB
Node 0, zone   Normal    327      2      1      1      1      1      1      0      0      0      1  5916 KB
Node 0, zone  HighMem  78051  15607    279      2     59     17      2      0      0      0      0  448052 KB

</toggledisplay>