topic There are some memory in Software Tuning, Performance Optimization & Platform Monitoring

Memory bandwidth without uncore counters

Anatoly_S_ — Fri, 18 Dec 2015 06:35:38 GMT

Hello!

I'm trying to get the RAM and cache bandwidth metrics. It is seem possible to benchmark the system capacity, using lmbench for example, but I wonder how to do it for existing process (i.e. utilization)?

I see, that I can use uncore counters with `perf` utility, but seems like there is no uncore support on my processor:

model : 60
model name : Intel(R) Xeon(R) CPU E3-1230 v3 @ 3.30GHz
stepping : 3
microcode : 0x1a

# ls /sys/bus/event_source/devices/
breakpoint cpu software tracepoint

How can I track for the memory bandwidth metrics for some PID, more or less accurately?

Thanks in advance!

There are some memory

McCalpinJohn — Fri, 18 Dec 2015 13:49:12 GMT

There are some memory bandwidth counters in the Xeon E3-1230 v3, but they are not easy to use....

Documentation is at https://software.intel.com/en-us/articles/monitoring-integrated-memory-controller-requests-in-the-2nd-3rd-and-4th-generation-intel

Intel Performance Counter

Thomas_W_Intel — Fri, 18 Dec 2015 14:41:44 GMT

Intel Performance Counter Monitor contains a sample implementation for reading these counters. However, they don't allow you to distinguish between processes. My recommendation is therefore that you do the measurement on an otherwise idle system.