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

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Message-ID: <20260104011738.475680-1-irogers@google.com>
Date: Sat,  3 Jan 2026 17:17:36 -0800
From: Ian Rogers <irogers@...gle.com>
To: Peter Zijlstra <peterz@...radead.org>, Ingo Molnar <mingo@...hat.com>, 
	Arnaldo Carvalho de Melo <acme@...nel.org>, Namhyung Kim <namhyung@...nel.org>, Jiri Olsa <jolsa@...nel.org>, 
	Ian Rogers <irogers@...gle.com>, Adrian Hunter <adrian.hunter@...el.com>, 
	James Clark <james.clark@...aro.org>, Thomas Falcon <thomas.falcon@...el.com>, 
	Thomas Richter <tmricht@...ux.ibm.com>, linux-perf-users@...r.kernel.org, 
	linux-kernel@...r.kernel.org
Subject: [PATCH v1 0/2] Add procfs based memory and network tool events

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