package require Thread set ::tids [list] for {set i 0} {$i < 4} {incr i} { lappend ::tids [thread::create [string map [list IVALUE $i] { set curdir [file dirname [info script]] load [file join $curdir tsdPerf.so] while 1 { tsdPerfSet IVALUE } }]] } puts TIDS:$::tids set curdir [file dirname [info script]] load [file join $curdir tsdPerf.so] tsdPerfSet 1234 while 1 { puts "TIME:[time {set value [tsdPerfGet]} 1000] VALUE:$value" }