You can use strace on a specific pid to figure out what a specific process is doing, e.g.:
strace -fp <pid>
You might see something like:
select(9, [3 5 8], [], [], {0, 999999}) = 0 (Timeout)
// ---------------------------------------------------------------------- | |
// Copyright (c) 2016, The Regents of the University of California All | |
// rights reserved. | |
// | |
// Redistribution and use in source and binary forms, with or without | |
// modification, are permitted provided that the following conditions are | |
// met: | |
// | |
// * Redistributions of source code must retain the above copyright | |
// notice, this list of conditions and the following disclaimer. |
// ---------------------------------------------------------------------- | |
// Copyright (c) 2016, The Regents of the University of California All | |
// rights reserved. | |
// | |
// Redistribution and use in source and binary forms, with or without | |
// modification, are permitted provided that the following conditions are | |
// met: | |
// | |
// * Redistributions of source code must retain the above copyright | |
// notice, this list of conditions and the following disclaimer. |
* gnetlist -g spice-noqsi -o test_active_inductor.net test_active_inductor.sch | |
AC Analysis Mon Feb 12 23:17:37 2018 | |
-------------------------------------------------------------------------------- | |
Index frequency s11 | |
-------------------------------------------------------------------------------- | |
0 1.000000e+02 9.997594e-01, 1.132451e-13 | |
1 1.001001e+02 9.997594e-01, 1.133585e-13 | |
2 1.002002e+02 9.997594e-01, 1.134718e-13 | |
3 1.003003e+02 9.997594e-01, 1.135852e-13 | |
4 1.004004e+02 9.997594e-01, 1.136985e-13 |