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* [dpdk-dev] [PATCH 0/5] add apistats function
@ 2020-12-04  7:51 Hideyuki Yamashita
  2020-12-04  7:51 ` [dpdk-dev] [PATCH 1/5] maintainers: update maintainers file for apistats Hideyuki Yamashita
                   ` (7 more replies)
  0 siblings, 8 replies; 29+ messages in thread
From: Hideyuki Yamashita @ 2020-12-04  7:51 UTC (permalink / raw)
  Cc: dev, Hideyuki Yamashita

In general, DPDK application consumes CPU usage because it polls
incoming packets using rx_burst API in infinite loop.
This makes difficult to estimate how much CPU usage is really
used to send/receive packets by the DPDK application.

For example, even if no incoming packets arriving, CPU usage
looks nearly 100% when observed by top command.

It is beneficial if developers can observe real CPU usage of the
DPDK application.
Such information can be exported to monitoring application like
prometheus/graphana and shows CPU usage graphically.

To achieve above, this patch set provides apistats functionality.
apistats provides the followiing two counters for each lcore.
- rx_burst_counts[RTE_MAX_LCORE]
- tx_burst_counts[RTE_MAX_LCORE]
Those accumulates rx_burst/tx_burst counts since the application starts.

By using those values, developers can roughly estimate CPU usage.
Let us assume a DPDK application is simply forwarding packets.
It calls tx_burst only if it receive packets.
If rx_burst_counts=1000 and tx_burst_count=1000 during certain
period of time, one can assume CPU usage is 100%.
If rx_burst_counts=1000 and tx_burst_count=100 during certain
period of time, one can assume CPU usage is 10%.
Here we assumes that tx_burst_count equals counts which rx_burst function
really receives incoming packets.


This patch set provides the following.
- basic API counting functionality(apistats) into librte_ethdev
- add code to testpmd to accumulate counter information
- add code to proc-info to retrieve above mentioned counter information
- add description in proc-info document about --apistats parameter
- modify MAINTAINERS file for apistats.c and apistats.h

Hideyuki Yamashita (5):
  maintainers: update maintainers file for apistats
  app/proc-info: add to use apistats
  app/test-pmd: add to use apistats
  docs: add description of apistats parameter into proc-info
  librte_ethdev: add to use apistats

 MAINTAINERS                      |  3 ++
 app/proc-info/main.c             | 46 +++++++++++++++++++++++
 app/test-pmd/testpmd.c           |  4 ++
 doc/guides/tools/proc_info.rst   | 10 ++++-
 lib/librte_ethdev/meson.build    |  6 ++-
 lib/librte_ethdev/rte_apistats.c | 64 ++++++++++++++++++++++++++++++++
 lib/librte_ethdev/rte_apistats.h | 64 ++++++++++++++++++++++++++++++++
 lib/librte_ethdev/rte_ethdev.h   |  7 ++++
 lib/librte_ethdev/version.map    |  5 +++
 9 files changed, 205 insertions(+), 4 deletions(-)
 create mode 100644 lib/librte_ethdev/rte_apistats.c
 create mode 100644 lib/librte_ethdev/rte_apistats.h

-- 
2.18.0


^ permalink raw reply	[flat|nested] 29+ messages in thread

end of thread, other threads:[~2021-02-22 15:10 UTC | newest]

Thread overview: 29+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2020-12-04  7:51 [dpdk-dev] [PATCH 0/5] add apistats function Hideyuki Yamashita
2020-12-04  7:51 ` [dpdk-dev] [PATCH 1/5] maintainers: update maintainers file for apistats Hideyuki Yamashita
2020-12-05 13:27   ` Varghese, Vipin
2020-12-24  6:36     ` Hideyuki Yamashita
2020-12-04  7:51 ` [dpdk-dev] [PATCH 2/5] app/proc-info: add to use apistats Hideyuki Yamashita
2020-12-05 13:15   ` Varghese, Vipin
2020-12-04  7:51 ` [dpdk-dev] [PATCH 3/5] app/test-pmd: " Hideyuki Yamashita
2020-12-05 13:04   ` Varghese, Vipin
2020-12-04  7:51 ` [dpdk-dev] [PATCH 4/5] docs: add description of apistats parameter into proc-info Hideyuki Yamashita
2020-12-05 13:02   ` Varghese, Vipin
2020-12-07  9:48     ` Pattan, Reshma
2020-12-04  7:51 ` [dpdk-dev] [PATCH 5/5] librte_ethdev: add to use apistats Hideyuki Yamashita
2020-12-05 13:01   ` Varghese, Vipin
2020-12-06 17:47   ` Stephen Hemminger
2020-12-24  6:33     ` Hideyuki Yamashita
2020-12-07 12:38   ` Ananyev, Konstantin
2020-12-22  2:48     ` Hideyuki Yamashita
2020-12-22  2:50     ` Hideyuki Yamashita
2020-12-22  9:04       ` Morten Brørup
2020-12-22 13:05       ` Ananyev, Konstantin
2020-12-04  9:09 ` [dpdk-dev] [PATCH 0/5] add apistats function Ferruh Yigit
2020-12-04 10:20 ` David Hunt
2020-12-05 13:23   ` Varghese, Vipin
2020-12-24  6:43     ` Hideyuki Yamashita
2020-12-24 12:35       ` Varghese, Vipin
2020-12-22  2:16   ` Hideyuki Yamashita
2020-12-07  9:46 ` Thomas Monjalon
2020-12-22  2:22   ` Hideyuki Yamashita
2021-02-22 15:10     ` Ferruh Yigit

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