OVIS-4.3.1

OVIS Version 4.3.1

LDMS v4.3_beta release schedule and high level overview of new features

LDMS features

• Metric sets are now removed by ldms_set_delete
• ldms_xprt_dir now conveys set meta-data information including size, and set_info information
• libfabrics LDMS transport plugin

LDMSD features

• ldmsd stream service:
  • A publish/subscribe service in ldmsd that allows external programs to send data (events) over an LDMS Transport to ldmsd plugins
  • Improvements to prdcr performance
• ldms_ls provides summary set size information as an aid to ldmsd aggregator memory configuration

New sampler plugins

• SPANK slurm_notifier: a Slurm SPANK plugin that uses ldmsd_stream to notify subscribers (plugins) of job events (e.g. start/stop).
  • Used by slurm_sampler, papi_sampler, and syspapi_sampler
• slurm_sampler:
  • Multi-tenant capable slurm job information sampler
• PAPI Job Sampler (papi_sampler):
  • Collects hardware event counters per-process for all processes of a job
  • Receives configuration from a job's environment the slurm stream
• PAPI System Sampler (syspapi_sampler):
  • Collects hardware event counters per-core, system wide
  • Uses libpfm for sampling and libpapi for event name to event-mask mapping
    • Allows consistent configuration to be used between syspapi and papi samplers.
      -Samples hardware performance counters on a per-core/uncore basis
• IBM OCC sampler (ibm_occ)

New store plugins

• slurm_store:
  • SOS store plugin that converts multi-tenant job information into a form more suitable for analysis
• papi_store:
  • SOS store plugin that converts PAPI job information into a form more suitable for analysis