gem_userptr_benchmark: 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/gem_userptr_benchmark - from package: intel-gpu-tools

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

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