DTrace is a comprehensive dynamic tracing framework for the Solaris Operating Environment.

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2
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1answer
48 views

Error on enabled probe: syscall::open_nocancel:entry): invalid user access in action #2 at DIF

I've the following one-liner to show files opened by process: sudo dtrace -n 'syscall::open*:entry { printf("%s %s",execname,copyinstr(arg0)); }' however I've plenty of repeated errors such as: ...
0
votes
1answer
30 views

Uprobes Status on the present linux kernel

I know uprobes was introduced on kernel 3.5 has it survived or is it dropped, is it still available on kernel 4.x
5
votes
1answer
660 views

Finding the source of CoW page faults on OS X

I'm trying to find the source of CoW page faults in some C code on OS X. I would like to use the vminfo DTrace provider, but vminfo isn't available on OS X. On Linux, I can use SystemTap to print a ...
4
votes
2answers
5k views

Measure disk IO latencies of a running process

I'm trying to measure the disk IO latencies of a running process to make a histogram. I could do this with DTrace in operating systems that provide it (e.g. as in this Joyent paper), but my ...
4
votes
1answer
466 views

Are there awk versions that provide syntax for computing aggregations?

From time to time I find myself writing awk scripts that compute some simple statistics. For example computing a histogram, the average of a value, the standard deviation or even the variance ... ...
3
votes
2answers
704 views

Java process, swap (/proc Solaris10) memory highly utilized

How can I analyze high swap memory utilization of Solaris 10 for Java processes?
5
votes
1answer
468 views

DTrace to trap any chmod applied to certain files

Underneath the Mac OS X directory /audit I have certain files which users can access and chmod to their liking. I need to audit any chmod done on any files by recording the time, user and file being ...