As June is coming to a close, useful to take stock of what is completed and what still remains. During June, the following were done: Phoronix benchmark list: I finished going through ~120 Phoronix benchmarks to at least do a … Continue reading →
I have added support to wspy for the –memstats option.
Continue reading →May coming to a close, useful to take stock of where analysis is at as well as next steps. I was cycling a good portion of May. The other parts were most focused on adding benchmark analysis needed for some … Continue reading →
I have updated the topdown wrapper script to add some additional cache statistics for level 3 backend related information. I have also added a -x option to display some rusage information.
Continue reading →The Intel topdown performance analysis method separates out frontend stalls (level 1) into latency (level 2) and bandwidth (level 2). A frontend latency stall is when 0 uops are issued at all because the frontend is waiting. A frontend bandwidth … Continue reading →
I have added a basic tool “topdown” that is a wrapper to collect topdown metrics.
Continue reading →As April finished, useful to take stock of where analysis is at as well as next steps. During May, I may also take a few week break to finish publishing my book and a cycle trip- so also useful to … Continue reading →
As a followup to this post, I’ve implemented per-process capture of backend counters. I can now create a memory report from a process tree.
Continue reading →I have added a new mode: –perfcounter-model application this supplements the previous two modes: –perfcounter-model process –perfcounter-model core This mode works similar to the process model, except only the root process is instrumented and then the “inherit” flag is passed. … Continue reading →
The ptrace(2) man page shows how one can subscribe for events such as PTRACE_EVENT_FORK or PTRACE_EVENT_VFORK type events that happens when a process calls fork()/vfork(). At such an event one can then call ptrace(PTRACE_GETEVENTMSG,…) to retrieve the pid of the … Continue reading →