C’est aussi ce qui m’étais arrivé sur mon G53SW (jessie 64b à jour).
Voici ce que je récupérais des messages du noyau :
michel@debg53sw:~$ dmesg | grep microcode
[ 0.227731] perf_event_intel: PEBS disabled due to CPU errata, please upgrade microcode
[ 1.459008] microcode: CPU0 sig=0x206a7, pf=0x10, revision=0x14
[ 1.459016] microcode: CPU1 sig=0x206a7, pf=0x10, revision=0x14
[ 1.459025] microcode: CPU2 sig=0x206a7, pf=0x10, revision=0x14
[ 1.459035] microcode: CPU3 sig=0x206a7, pf=0x10, revision=0x14
[ 1.459044] microcode: CPU4 sig=0x206a7, pf=0x10, revision=0x14
[ 1.459055] microcode: CPU5 sig=0x206a7, pf=0x10, revision=0x14
[ 1.459063] microcode: CPU6 sig=0x206a7, pf=0x10, revision=0x14
[ 1.459071] microcode: CPU7 sig=0x206a7, pf=0x10, revision=0x14
[ 1.459135] microcode: Microcode Update Driver: v2.00 <tigran@aivazian.fsnet.co.uk>, Peter Oruba
michel@debg53sw:~$
Alors, j’installe les paquetages intel-microcode et iucode-tool
puis je redémarre et relance la même commande sur la même machine :
michel@debg53sw:~$ dmesg | grep microcode
[ 0.000000] CPU0 microcode updated early to revision 0x29, date = 2013-06-12
[ 0.242802] CPU1 microcode updated early to revision 0x29, date = 2013-06-12
[ 0.256557] CPU2 microcode updated early to revision 0x29, date = 2013-06-12
[ 0.270052] CPU3 microcode updated early to revision 0x29, date = 2013-06-12
[ 1.177279] microcode: CPU0 sig=0x206a7, pf=0x10, revision=0x29
[ 1.177387] microcode: CPU1 sig=0x206a7, pf=0x10, revision=0x29
[ 1.177498] microcode: CPU2 sig=0x206a7, pf=0x10, revision=0x29
[ 1.177610] microcode: CPU3 sig=0x206a7, pf=0x10, revision=0x29
[ 1.177722] microcode: CPU4 sig=0x206a7, pf=0x10, revision=0x29
[ 1.177833] microcode: CPU5 sig=0x206a7, pf=0x10, revision=0x29
[ 1.177942] microcode: CPU6 sig=0x206a7, pf=0x10, revision=0x29
[ 1.178052] microcode: CPU7 sig=0x206a7, pf=0x10, revision=0x29
[ 1.178218] microcode: Microcode Update Driver: v2.00 <tigran@aivazian.fsnet.co.uk>, Peter Oruba
michel@debg53sw:~$
Et effectivement, je me suis très vite rendu compte de l’amélioration de la réactivité de mes machine virtuelles, et du système en général.