hotkernel - sample on-CPU kernel-level functions and modules. hotkernel [-hm] This samples the on-CPU function at 1001 Hertz, for a simple yet effective kernel-level profiling tool for sampling exclusive function time. The output will identify which function is on the CPU the most - which is the hottest. See Notes/ALLexclusive_notes.txt for an explanation of exclusive time. Solaris stable - Written using Perl and DTrace (Solaris 10 03/05)

Sample kernel functions, # hotkernel

Sample kernel modules, # hotkernel -m

See the DTraceToolkit for further documentation under the Docs directory. The DTraceToolkit docs may include full worked examples with verbose descriptions explaining the output. hotkernel will run until Ctrl-C is hit. Brendan Gregg [CA, USA] dtrace(1M), hotuser(1M)