perf_3.16: command not found

Maybe Your $PATH variable doesn't contain the default paths? echo $PATH should give something like:

[root@server ~]# echo $PATH
/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin

If it's empty, You may set the PATH variable with this command

export PATH="/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin"

On Debian possible default full paths are:

/usr/bin/perf_3.16 - from package: linux-tools-3.16

You may install the required package with command apt-get install {package}

Error in other languages:
perf_3.16: bevel nie gevind nie
perf_3.16: comandă negăsită
perf_3.16: comando não encontrado
perf_3.16: commande introuvable
perf_3.16: command not found
perf_3.16: käsku ei ole
perf_3.16: không tìm thấy lệnh
perf_3.16: komanda nerasta
perf_3.16: Kommando nicht gefunden.
perf_3.16: kommandot finns inte
perf_3.16: komut yok
perf_3.16: nie znaleziono polecenia
perf_3.16: níor aimsíodh an t-ordú
perf_3.16: no se encontró la orden
perf_3.16: no s'ha trobat l'ordre
perf_3.16: opdracht niet gevonden
perf_3.16: parancs nem található
perf_3.16: perintah tidak ditemukan
perf_3.16: príkaz nenájdený
perf_3.16: příkaz nenalezen
perf_3.16: команда не найдена
perf_3.16: командата не е открита
perf_3.16: 命令找不到
perf_3.16: コマンドが見つかりません