Ruby bindings for PCP trace PMDA & API

Ruby bindings of:

https://github.com/performancecopilot/pcp/blob/master/src/include/pcp/trace.h

As easy as that. Visit man page for more info:

http://pcp.io/man/man3/pmdatrace.3.html

require "pcptrace"

# reached a point in source code
PCPTrace::point("a_point"))

# observation of an arbitrary value
PCPTrace::obs("an_observation", 130.513))

# a counter - increasing or decreasing
PCPTrace::counter("a_counter", 1))

# time spent in a transaction (or block)
PCPTrace::begin("a_transaction"))
# ...
PCPTrace::end("a_transaction"))

# transactions must be aborted (e.g. exception)
#PCPTrace::abort("a_transaction"))

# all methods return non-zero code
result = PCPTrace::counter("a_counter", -5))
puts("Error: " + PCPTrace::errstr(result)) if result != 0

Little bit more Ruby-friendly wraper:

require 'pcptrace/kernel'
PCPTrace::setup_kernel(true)

pcp_point("a_point")
pcp_observe("an_observation", 99.9)
pcp_counter("a_counter", 10)
pcp_counter("a_counter") # increment by 1
pcp_measure("a_transaction") do
  # block of code - properly aborted on exception
end

The PCP library and headers.

$ dnf install ruby-devel pcp pcp-libs-devel

$ sudo apt-get install noidea todo

Regular rubygem:

gem install pcptrace

When building from source:

rake compile

• Lukas Zapletal

(The MIT License)

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