108 lines
2.6 KiB
Python
Executable File
108 lines
2.6 KiB
Python
Executable File
#!/usr/bin/python3
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# -*- coding: UTF-8 -*-
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"""
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This script defines the function to do the irq related analysis
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"""
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import csv
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import struct
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from config import TSC_FREQ
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TSC_BEGIN = 0
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TSC_END = 0
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VMEXIT_ENTRY = 0x10000
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LIST_EVENTS = {
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'VMEXIT_EXTERNAL_INTERRUPT': VMEXIT_ENTRY + 0x00000001,
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}
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IRQ_EXITS = {}
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# 4 * 64bit per trace entry
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TRCREC = "QQQQ"
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def parse_trace(ifile):
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"""parse the trace data file
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Args:
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ifile: input trace data file
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Return:
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None
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"""
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fd = open(ifile, 'rb')
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while True:
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global TSC_BEGIN, TSC_END
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try:
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line = fd.read(struct.calcsize(TRCREC))
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if not line:
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break
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(tsc, event, vec, d2) = struct.unpack(TRCREC, line)
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event = event & 0xffffffffffff
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if TSC_BEGIN == 0:
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TSC_BEGIN = tsc
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TSC_END = tsc
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for key in LIST_EVENTS.keys():
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if event == LIST_EVENTS.get(key):
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if vec in IRQ_EXITS.keys():
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IRQ_EXITS[vec] += 1
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else:
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IRQ_EXITS[vec] = 1
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except struct.error:
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sys.exit()
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def generate_report(ofile, freq):
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""" generate analysis report
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Args:
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ofile: output report
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freq: TSC frequency of the device trace data from
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Return:
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None
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"""
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global TSC_BEGIN, TSC_END
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csv_name = ofile + '.csv'
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try:
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with open(csv_name, 'a') as filep:
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f_csv = csv.writer(filep)
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rt_cycle = TSC_END - TSC_BEGIN
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assert rt_cycle != 0, "Total run time in cycle is 0, \
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TSC end %d, TSC begin %d" \
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% (TSC_END, TSC_BEGIN)
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rt_sec = float(rt_cycle) / (float(freq) * 1000 * 1000)
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print ("%-8s\t%-8s\t%-8s" % ("Vector", "Count", "NR_Exit/Sec"))
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f_csv.writerow(['Vector', 'NR_Exit', 'NR_Exit/Sec'])
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for e in IRQ_EXITS.keys():
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pct = float(IRQ_EXITS[e]) / rt_sec
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print ("0x%08x\t%-8d\t%-8.2f" % (e, IRQ_EXITS[e], pct))
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f_csv.writerow(['0x%08x' % e, IRQ_EXITS[e], '%.2f' % pct])
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except IOError as err:
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print ("Output File Error: " + str(err))
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def analyze_irq(ifile, ofile):
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"""do the vm exits analysis
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Args:
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ifile: input trace data file
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ofile: output report file
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Return:
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None
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"""
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print("IRQ analysis started... \n\tinput file: %s\n"
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"\toutput file: %s.csv" % (ifile, ofile))
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parse_trace(ifile)
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# save report to the output file
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generate_report(ofile, TSC_FREQ)
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