-- Damjan > On 8 Oct 2018, at 07:37, Aleksander Djuric <aleksander.dju...@gmail.com> > wrote: > > Hi Everyone! > > I am trying to parse binary ELOG file, but have no success. > Is there someone who know something about ELOG file format? > At now I'm trying to get the unix timestamp of the each event. > > I had found small python script here: > https://github.com/theleos88/vpp-bench/wiki/ELOG > <https://github.com/theleos88/vpp-bench/wiki/ELOG> > ...but it's not work for me. > > The event definition in my case looks like: > ELOG_TYPE_DECLARE (el) = { > .format = "test [%d]: event", > .format_args = "i4", > }; > > Just for test this event prints always number "234" > For parsing the binary log I had written the code based on the script I have > mentioned above: > > #!/usr/bin/python -d > import io > import binascii > import os > import mmap > import itertools > import struct > import sys > import time > infil = '/tmp/test.log' > def parse_int(itr, size): > int_str = [] > for i in range(0,size): > int_str.append( next(itr)) > d = b"".join(int_str) > return int(binascii.hexlify(d), 16) > def parse_double(itr): > int_str = [] > for i in range(0,8): > int_str.append(next(itr)) > d = b"".join(int_str) > return struct.unpack('d', d)[0] > if __name__ == '__main__': > with open(infil, 'rb') as f: > # memory-map the file, size 0 means whole file > mm = mmap.mmap(f.fileno(), 0, access=mmap.ACCESS_READ) > itr = iter(mm) > for b in itr: > if (b == b'@'): > try: > e = parse_int(itr, 3) # Binary file dependent > d = parse_int(itr, 4) # Data > ts = parse_double(itr) # Timestamp > print ("Id:",e,"Data",d,"TS",ts) > except: > print ("fail") > mm.close() > > The script output looks very strange: > > ('Id:', 12583082, 'Data', 4077750898, 'TS', -2.033971772667215e+189) > ('Id:', 4913710, 'Data', 234, 'TS', 6.36910374265963e-272) > ('Id:', 4946789, 'Data', 234, 'TS', -3.781860196468732e+215) > ('Id:', 4980415, 'Data', 234, 'TS', 2.8913004726712464e+252) > ('Id:', 5014033, 'Data', 234, 'TS', 1.0459787848697367e-194) > ('Id:', 5047603, 'Data', 234, 'TS', 1.8541854501616871e+87) > ('Id:', 5081197, 'Data', 234, 'TS', -1.9417949536011382e+216) > ('Id:', 5114754, 'Data', 234, 'TS', -1.1766415030126902e-236) > ('Id:', 5148346, 'Data', 234, 'TS', 2.805116355676246e-134) > ('Id:', 5181997, 'Data', 234, 'TS', 1.2734961345447485e-257) > fail > > 1) It seems that the first and the last line of the log has a different > format (???). > 2) I can't understand the format of the timestamp field (or these 8 bytes is > not a timestamp). > 3) Data prints correctly. > > Could anyone help me please? > Thanks in advance, > Aleksander
Looking into g2 source might be good start. g2 is GTK based elog graphical viewer... https://git.fd.io/vpp/tree/src/tools/g2 <https://git.fd.io/vpp/tree/src/tools/g2> -- Damjan
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