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IDS Forum

sysmaster tables for onstat -u and onstat -g ath

Posted By: JACOB SALOMON
Date: Friday, 1 April 2016, at 11:03 a.m.

Greetings.

In my quest to produce Perl scripts that consolidate the output of onstat commands, it has been mostly straightforward to break up a line into into its component pieces of data. For example, onstat -u, every line has exactly one string in every column.

Not so for some others (like onstat -d), which I have worked around but never liked the solution. And now, trying to break up a line in "onstat -g ath" my workaround looks especially ugly. Here's a couple of lines from that. Sorry if I can't make them align; our forums display in a non-fixed-width font and compress repeated spaces.

tid tcb rstcb prty status vp-class name
2 1e89112a0 0 1 IO Idle 7lio* lio vp 0
13 1e8a87830 1e7de6870 1 sleeping secs: 1 1cpu flush_sub(0)

Notice that under the "status" heading, one row has 2 strings and the next has 3. In contrast, under the "name" heading, the first row has 3 strings while the second row has only 1 string.

This kind of setup upsets the cart for me as a Perl programmer; I can't simply program for $column[4] because that does not capture the whole value of what we humans see as the column.

That's my motive for this question: Where in sysmaster can I find this information? I have looked in systhreads, systcblst and sysrstcb (the latter two officially undocumented and hence, not reliable after an upgrade). I find some of this stuff but, to give one example: The status shows up as 0x20 and that' supposed to mean "running", I think. But I would have to know that in my scripting because the word does not appear in the table itself.

That's my question. For any Perl scholars I have more information but the above sums it up.

My Perl workarounds, for Perl scholars:
1. I thought of splitting each line by a regular expression of a minimum of 2 spaces. Then I encountered statuses like "cond wait btc_sort", and "cond wait netnorm" which have 2 consecutive spaces. Perhaps a 3-space minimum as a field delimiter? I may experiment.
2. Using the offsets of the various human-visible fields, something like sscanf(). (Who uses that in C even? Anyone remember that function?) The problem is that in another release of the IDS product, those offset may change. So I would have set up different sets of offsets for each new release of IDS. (BTW, the Perl sscanf() function does not work; it stops for spaces no matter the length I give it.)

Thanks much for even reading this far!

-- Jacob, the master of precision. NOT

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