▁by ▁Se ppo ▁Ker onen ▁and ▁Jonathan ▁K nis pel , ▁early ▁in ▁ 1 9 9 4 . ▁ ▁These ▁four ▁produced ▁the ▁initial ▁version ▁of ▁Performance ▁Co - P il ot ▁ 1 . 0 , ▁which ▁was ▁released ▁in ▁April ▁ 1 9 9 5 ▁as ▁add - on ▁software ▁for ▁S G I ' s ▁I RI X ▁operating ▁system . ▁Com ponents ▁included ▁in ▁that ▁initial ▁release ▁were : ▁pm cd ▁( K en ▁and ▁Jonathan ), ▁pm chart ▁( Mark ), ▁lib pc p ▁( K en ), ▁pm ie ▁( Se ppo ), ▁pm g ad gets ▁( J on athan ), ▁and ▁a ▁host ▁of ▁other ▁smaller ▁bits ▁and ▁pieces . ▁Other ▁significant ▁early ▁contrib utors ▁were ▁An ia ▁B ode it , ▁David ▁Ch atter ton ▁( pm view ), ▁Ivan ▁Ray ner , ▁Nathan ▁Scott ▁and ▁Tim ▁Sh im min . ▁ ▁In ▁ 2 0 0 0 , ▁the ▁core ▁of ▁P CP ▁was ▁re - re leased ▁as ▁free ▁software , ▁under ▁the ▁GNU ▁L G PL . ▁Add itional ▁propriet ary ▁components ▁have ▁been ▁re - re leased ▁as ▁free ▁software ▁since ▁then . ▁▁ ▁Currently ▁an ▁active ▁community ▁of ▁contrib utors ▁is ▁en han cing ▁the ▁open ▁source ▁distribution ▁of ▁P CP ▁and ▁re le asing ▁new ▁tools ▁built ▁upon ▁it . ▁ ▁See ▁also ▁▁ ▁Com parison ▁of ▁network ▁monitoring ▁systems ▁ ▁Open L MI , ▁which ▁includes ▁P CP ▁monitoring ▁agent ▁ ▁References ▁ ▁External ▁links ▁