[PATCH v1 0/2] Add procfs based memory and network tool events

[Ian Rogers <irogers@google.com>]

Add events for memory use and network activity based on data readily
available in /prod/pid/statm, /proc/pid/smaps_rollup and
/proc/pid/net/dev. For example the network usage of chrome processes
on a system may be gathered with:
```
$ perf stat -e net_rx_bytes,net_rx_compressed,net_rx_drop,net_rx_errors,net_rx_fifo,net_rx_frame,net_rx_multicast,net_rx_packets,net_tx_bytes,net_tx_carrier,net_tx_colls,net_tx_compressed,net_tx_drop,net_tx_errors,net_tx_fifo,net_tx_packets -p $(pidof -d, chrome) -I 1000
     1.001023475                  0      net_rx_bytes
     1.001023475                  0      net_rx_compressed
     1.001023475         42,647,328      net_rx_drop
     1.001023475        463,069,152      net_rx_errors
     1.001023475                  0      net_rx_fifo
     1.001023475                  0      net_rx_frame
     1.001023475                  0      net_rx_multicast
     1.001023475    423,195,831,744      net_rx_packets
     1.001023475                  0      net_tx_bytes
     1.001023475                  0      net_tx_carrier
     1.001023475                  0      net_tx_colls
     1.001023475                  0      net_tx_compressed
     1.001023475                  0      net_tx_drop
     1.001023475                  0      net_tx_errors
     1.001023475                  0      net_tx_fifo
     1.001023475                  0      net_tx_packets
```

As the events are in the tool_pmu they can be used in metrics. The
json descriptions they are exposed in `perf list` and the events can
be seen in the python ilist application.

Note, if a process terminates then the count reading returns an error
and this can expose what appear to be latent bugs in the aggregation
and display code.

Ian Rogers (2):
  perf tool_pmu: Add memory events
  perf tool_pmu: Add network events

 tools/perf/builtin-stat.c                     |  10 +-
 .../pmu-events/arch/common/common/tool.json   | 266 ++++++++-
 tools/perf/pmu-events/empty-pmu-events.c      | 312 +++++++----
 tools/perf/util/tool_pmu.c                    | 514 +++++++++++++++++-
 tools/perf/util/tool_pmu.h                    |  44 ++
 5 files changed, 1026 insertions(+), 120 deletions(-)

-- 
2.52.0.351.gbe84eed79e-goog