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On 11/28/2007 09:20 PM, Centos wrote:

Hello

in our Sysstat output we have the following lines, any one knows what does it mean ?

00:00:01 CPU i000/s i008/s i009/s i014/s i066/s i074/s i082/s i090/s 01:20:01 0 248.09 0.00 0.00 0.00 0.00 0.00 0.04 91.06 01:20:01 1 255.06 0.00 0.00 4.59 0.00 0.00

[...]

I guess you are monitoring interrupt activity by processor (sar -I PROC).

See "Red Hat Linux 9: Red Hat Linux System Administration Primer" [0] or the "sar" man page - Here quote from the guide:

By using the command sar -I PROC, it is possible to break down interrupt activity by processor (on multiprocessor systems) and by interrupt level (from 0 to 15):

This report (which has been truncated horizontally to fit on the page) includes one column for each interrupt level (the i002/s field illustrating the rate for interrupt level 2). If this were a multiprocessor system, there would be one line per sample period for each CPU.

Another important point to note about this report is that sar adds or removes specific interrupt fields if no data is collected for that field. This can be seen in the example report above; the end of the report includes interrupt levels (3 and 10) that were not present at the start of the sampling period.

[0] http://www.redhat.com/docs/manuals/linux/RHL-9-Manual/admin-primer/s1-bandwi...

cheers Simon

- -- actually, I think Windows Vista has done more than virtually any OS release to promote the use of Linux (Slashdot Kommentar, 4. Oct 07)