Hi, I stumbled across this as well and I rebuild atop with nostrip which gave me this backtrace:
----SNIP---- /tmp/atop-dbg/atop-1.27.3$ gdb /usr/bin/atop /var/lib/coredumps/atop.1440280803/core Reading symbols from /usr/bin/atop...done. [New LWP 27858] Core was generated by `/usr/bin/atop -a -w /var/log/atop/atop_20150823 600'. Program terminated with signal SIGFPE, Arithmetic exception. #0 0x0000000000407662 in acctprocnt () at acctproc.c:571 warning: Source file is more recent than executable. 571 return (statacc.st_size - acctsize) / acctrecsz; gdb $ bt full #0 0x0000000000407662 in acctprocnt () at acctproc.c:571 statacc = { st_dev = 18, st_ino = 996486, st_nlink = 1, st_mode = 33152, st_uid = 0, st_gid = 0, __pad0 = 0, st_rdev = 0, st_size = 0, st_blksize = 4096, st_blocks = 0, st_atim = { tv_sec = 1440280803, tv_nsec = 90171947 }, st_mtim = { tv_sec = 1440280803, tv_nsec = 89171920 }, st_ctim = { tv_sec = 1440280803, tv_nsec = 89171920 }, __glibc_reserved = {0, 0, 0} } #1 0x0000000000403242 in engine () at atop.c:829 lastcmd = <optimized out> nactproc = 4285065470 totslpi = -1613224016 devsstat = 0x7fb47489d010 curpact = 0x7fb474867010 curpexit = <optimized out> devtstat = <optimized out> ntask = 280 sigact = { __sigaction_handler = { sa_handler = 0x403890 <getalarm>, sa_sigaction = 0x403890 <getalarm> }, sa_mask = { __val = {0 <repeats 16 times>} }, sa_flags = 0, sa_restorer = 0x0 } devpstat = <optimized out> nexit = <optimized out> ndeviat = <optimized out> totproc = 1 totrun = 0 totslpu = 32767 totzombie = 1954458716 presstat = 0x7fb474981010 curplen = 298 i = <optimized out> noverflow = <optimized out> hlpsstat = 0x7fb474981010 j = <optimized out> timelimit = 0 cursstat = 0x7fb47490f010 #2 main (argc=<optimized out>, argv=<optimized out>) at atop.c:659 i = <optimized out> c = <optimized out> p = <optimized out> rlim = { rlim_cur = 18446744073709551615, rlim_max = 18446744073709551615 } gdb $ print acctrecsz $1 = 0 ----SNIP---- This is a global variable in acctproc.c. Unfortunately, I didn't have the time to investigate this yet. Cheers, sur5r -- ceterum censeo microsoftem esse delendam.
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