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irqtrk.py
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irqtrk.py
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#!/usr/bin/python
import re
import sys
from time import sleep
import optparse
import curses
from datetime import datetime
DESCRIPTION = """Displays IRQ usage
Symbols:
+ Current interrupt
# Old interrupt (there has been interrupts)
- No interrupts detected
"""
class NoMatchingIRQsException(Exception):
pass
LINE_FORMAT = '[%13s | %03s] %s [%10i | %5i]'
HEAD_FORMAT = '[%13s | %03s] %s [%10s | %5s]'
class IRQtrk(object):
def __init__(self, match='-', interval=1.0):
self.match = re.compile(match)
self.interval = float(interval)
self.scr = None
self.pad = None
self.hpad = None
self.y = None
self.x = None
self.core_irqs = []
self.loops = 0
self.time = datetime.now()
self.old_time = datetime.now()
self.irqs_start = None
self.curr_irqs = {}
self._get_irqs()
self.irqs_start = self.curr_irqs.copy()
self.old_irqs = self.curr_irqs.copy()
self.irq_count = len(self.irqs_start)
self.cpu_count = None
self.cpu_count = self._get_cpu_count()
# space between cpus
self.spacing = 2
self.scroll = 0
self.center = ''
self._init_screen()
def _init_screen(self):
self.scr = curses.initscr()
self.y, self.x = self.scr.getmaxyx()
# hide cursor
curses.curs_set(0)
self.scr.keypad(1)
curses.noecho()
# instant key input
curses.cbreak()
self.hpad = curses.newpad(1, self.x)
self.pad_y = self.irq_count + 7
self.pad = curses.newpad(self._get_height(), self.x)
#self._fit_size()
self._set_header()
def _get_height(self):
return self.irq_count + self._get_cpu_rows() + 2
def _get_width(self, spacing=None):
if not spacing:
spacing = self.spacing
return self.cpu_count * spacing + 43
def _get_cpu_rows(self):
return int(self.cpu_count / int(self._get_width() / 12))
def _fit_size(self):
"""
Fit to current window size
"""
ny, nx = self.scr.getmaxyx()
if ny != self.y or nx != self.x:
# window resized
self.scr.clear()
self.y = ny
self.x = nx
self.pad.clear()
self.hpad.clear()
self.hpad.resize(1, self.x)
self.pad.resize(self._get_height(),self.x)
self._set_header()
def _set_header(self):
if self._get_width(spacing=2) > self.x:
self.spacing = 1
self.center = '+/#/-'
else:
self.spacing = 2
self.center = '+ = Current, # = Old, - = No'
if (self.cpu_count * self.spacing) < 32:
self.center = '+/#/-'
# ugly center placement, format available in Python >= 2.7
for i in range((self.cpu_count * self.spacing) - len(self.center)):
if (i % 2) == 0:
self.center += ' '
else:
self.center = ' ' + self.center
def _get_irqs(self):
"""
Get IRQs
"""
#irqs = {}
try:
irqfile = open('/proc/interrupts', 'r')
except IOError:
raise
lines = irqfile.readlines()
for line in lines:
if len(line) > 2:
self._parse_irqline(line)
irqfile.close()
def _get_cpu_count(self):
"""Get number of CPUs"""
f = open('/proc/interrupts', 'r')
line = f.readline()
f.close()
return len(line.split())
def _refresh_screen(self):
row = 0
#print header
keys = self.curr_irqs.keys()
self.pad.refresh(self.scroll, 0, 1, 0, self.y-1, self.x-1)
for k in sorted(keys):
if self.old_irqs[k] != None:
try:
self.pad.addstr(row, 0, self._get_diffline(k))
row += 1
except Exception as e:
print("ERROR: %s" % e)
raise
st = 'irqs per core'
for i in range(self._get_width() - len(st)):
if (i % 2) == 0:
st = "-%s" % st
else:
st = "%s-" % st
self.pad.addstr(row, 0, st)
row += 1
core = 0
place = 0
vplace = 0
rows = self._get_cpu_rows()
for irqs in self.core_irqs:
try:
self.pad.addstr(row + vplace,place, "[%02i:%7i]" % (core, irqs))
except:
break
vplace += 1
if vplace > rows:
vplace = 0
place += 12
core += 1
self.hpad.addstr(0, 0, HEAD_FORMAT % ('name', 'IRQ',
self.center, 'Interrupts', '1/sec'))
self.hpad.refresh(0, 0, 0, 0, 1, self.x-1)
self.pad.refresh(self.scroll, 0, 1, 0, self.y-1, self.x-1)
def _get_diffline(self, k):
retval = ''
itot = 0
for i in range(0,len(self.curr_irqs[k])-1):
ind = None
diff_to_begin = int(self.curr_irqs[k][i])-int(self.irqs_start[k][i])
if self.curr_irqs[k][i] != self.old_irqs[k][i]:
ind = '+'
elif diff_to_begin != 0:
ind = '#'
else:
ind = '-'
retval += " "*(self.spacing - 1) + str(ind)
itot += diff_to_begin
stot=0
core = 0
for i in range(0,len(self.curr_irqs[k])-1):
diff_to_old = int(self.curr_irqs[k][i])-int(self.old_irqs[k][i])
stot += diff_to_old
if len(self.core_irqs) == core:
self.core_irqs.append(0)
self.core_irqs[core] += int(diff_to_old)
core += 1
time = self.time - self.old_time
time = time.seconds + (float(time.microseconds) / 1000000)
stot = int(stot / time + 0.5)
name = self.curr_irqs[k][len(self.curr_irqs[k])-1][0:12]
if stot > 100000:
stot = 0
return LINE_FORMAT % (name, k, retval, itot, stot)
def _parse_irqline(self, line):
line = line.strip()
if self.match.search(line) == None:
return
data = line.split(':',2)
if len(data) < 2:
return
irq = data[0]
irqdata = data[1].strip()
irq_per_core = []
pattern = re.compile(r'\s+')
irqdata_array = re.sub(pattern, ' ', irqdata).split(' ')
name = []
for core_irqs in irqdata_array:
try:
int(core_irqs)
except ValueError:
if core_irqs != 'interrupts' and '-edge' not in core_irqs and \
'-fasteoi' not in core_irqs:
name.append(core_irqs)
continue
irq_per_core.append(core_irqs)
# add irq name as last item
try:
irq = int(irq)
irq_per_core.append(' '.join(name))
except:
irq_per_core.append('')
if len(irq_per_core) < 3:
return
self.curr_irqs[irq] = irq_per_core
def loop(self):
self.scr.timeout(int(interval * 60))
while True:
self.loops += 1
# update self.curr_irqs
self.time = datetime.now()
self._get_irqs()
self._fit_size()
self._refresh_screen()
self.old_irqs = self.curr_irqs
self.curr_irqs = {}
self.old_time = self.time
self.core_irqs = []
# Sleep
g = 0
while True:
c = self.scr.getch()
if c == curses.KEY_UP:
if self.scroll > 0:
self.scroll -= 1
break
elif c == curses.KEY_DOWN:
if self.scroll <= (self.irq_count - self.y):
self.scroll += 1
break
g += 1
if g > 14:
break
def reset_term():
try:
curses.nocbreak()
curses.echo()
curses.endwin()
except:
pass
if __name__ == '__main__':
parser = optparse.OptionParser(description=DESCRIPTION)
parser.add_option('--interval','-i', help="refresh interval",
type=float, default=float(1),dest='interval')
parser.add_option('--match','-m', help="match IRQ name",
type=str, default='-', dest='match')
args, options = parser.parse_args()
try:
interval = float(args.interval)
except:
print('Invalid value given to -i option')
sys.exit(1)
match='-'
if args.match:
match = args.match
try:
c = IRQtrk(match, interval)
sys.exit(c.loop())
except NoMatchingIRQsException:
print("Matching irqs not found")
sys.exit(1)
except KeyboardInterrupt:
reset_term()
except Exception as e:
reset_term()
raise