https://community.intel.com/t5/Software-Tuning-Performance/Reset-MSR-PKG-POWER-LIMIT-Lock-63-bit/m-p/1007380#M3690 <P style="margin-bottom: 0px; border: 0px; font-size: 12px; vertical-align: baseline; color: rgb(61, 61, 61); font-family: intel-clear, arial, helvetica, 'helvetica neue', verdana, sans-serif !important;"><SPAN style="margin: 0px; padding: 0px; border: 0px; font-style: inherit; vertical-align: baseline; color: rgb(0, 0, 0);">I see that the Lock (63) bit is set in the MSR_PKG_POWER_LIMIT on our Intel(R) Xeon(R) CPU E5-2650 v3 @ 2.30GHz, which is running a Dell Bios. This can be seen when I read the MSR on the two sockets.</SPAN></P> <P style="margin-bottom: 0px; border: 0px; font-size: 12px; vertical-align: baseline; color: rgb(61, 61, 61); font-family: intel-clear, arial, helvetica, 'helvetica neue', verdana, sans-serif !important;"><SPAN style="color: rgb(0, 0, 0); font-style: inherit;">cpu0: MSR_PKG_POWER_LIMIT: 0x800683f0005a8348 (locked)</SPAN></P> <P style="margin-bottom: 0px; border: 0px; font-size: 12px; vertical-align: baseline; color: rgb(61, 61, 61); font-family: intel-clear, arial, helvetica, 'helvetica neue', verdana, sans-serif !important;"><SPAN style="margin: 0px; padding: 0px; border: 0px; font-style: inherit; vertical-align: baseline; color: rgb(0, 0, 0);">cpu1: MSR_PKG_POWER_LIMIT: 0x800683f0005a8348 (locked)</SPAN></P> <P style="margin-bottom: 0px; border: 0px; font-size: 12px; vertical-align: baseline; color: rgb(61, 61, 61); font-family: intel-clear, arial, helvetica, 'helvetica neue', verdana, sans-serif !important;"><SPAN style="color: rgb(0, 0, 0); font-style: inherit;">Once this bit is locked, it ignores any further writes till next reboot making it impossible to power cap the machine. I thought that there may be some setting in the BIOS which could enable this, however I am not able to find it.</SPAN></P> <P style="margin-bottom: 0px; border: 0px; font-size: 12px; vertical-align: baseline; color: rgb(61, 61, 61); font-family: intel-clear, arial, helvetica, 'helvetica neue', verdana, sans-serif !important;"><SPAN style="color: rgb(0, 0, 0); font-style: inherit;">I would be grateful if you or anyone could help me in this regard.</SPAN></P> <P style="margin-bottom: 0px; border: 0px; font-size: 12px; vertical-align: baseline; color: rgb(61, 61, 61); font-family: intel-clear, arial, helvetica, 'helvetica neue', verdana, sans-serif !important;"><SPAN style="color: rgb(0, 0, 0); font-style: inherit;">Thanks,</SPAN></P> <P style="margin-bottom: 0px; border: 0px; font-size: 12px; vertical-align: baseline; color: rgb(61, 61, 61); font-family: intel-clear, arial, helvetica, 'helvetica neue', verdana, sans-serif !important;"><SPAN style="color: rgb(0, 0, 0); font-style: inherit;">Sridutt</SPAN></P> Wed, 07 Oct 2015 15:27:02 GMT sbhal1 2015-10-07T15:27:02Z https://community.intel.com/t5/Software-Tuning-Performance/Reset-MSR-PKG-POWER-LIMIT-Lock-63-bit/m-p/1007380#M3690 <P style="margin-bottom: 0px; border: 0px; font-size: 12px; vertical-align: baseline; color: rgb(61, 61, 61); font-family: intel-clear, arial, helvetica, 'helvetica neue', verdana, sans-serif !important;"><SPAN style="margin: 0px; padding: 0px; border: 0px; font-style: inherit; vertical-align: baseline; color: rgb(0, 0, 0);">I see that the Lock (63) bit is set in the MSR_PKG_POWER_LIMIT on our Intel(R) Xeon(R) CPU E5-2650 v3 @ 2.30GHz, which is running a Dell Bios. This can be seen when I read the MSR on the two sockets.</SPAN></P> <P style="margin-bottom: 0px; border: 0px; font-size: 12px; vertical-align: baseline; color: rgb(61, 61, 61); font-family: intel-clear, arial, helvetica, 'helvetica neue', verdana, sans-serif !important;"><SPAN style="color: rgb(0, 0, 0); font-style: inherit;">cpu0: MSR_PKG_POWER_LIMIT: 0x800683f0005a8348 (locked)</SPAN></P> <P style="margin-bottom: 0px; border: 0px; font-size: 12px; vertical-align: baseline; color: rgb(61, 61, 61); font-family: intel-clear, arial, helvetica, 'helvetica neue', verdana, sans-serif !important;"><SPAN style="margin: 0px; padding: 0px; border: 0px; font-style: inherit; vertical-align: baseline; color: rgb(0, 0, 0);">cpu1: MSR_PKG_POWER_LIMIT: 0x800683f0005a8348 (locked)</SPAN></P> <P style="margin-bottom: 0px; border: 0px; font-size: 12px; vertical-align: baseline; color: rgb(61, 61, 61); font-family: intel-clear, arial, helvetica, 'helvetica neue', verdana, sans-serif !important;"><SPAN style="color: rgb(0, 0, 0); font-style: inherit;">Once this bit is locked, it ignores any further writes till next reboot making it impossible to power cap the machine. I thought that there may be some setting in the BIOS which could enable this, however I am not able to find it.</SPAN></P> <P style="margin-bottom: 0px; border: 0px; font-size: 12px; vertical-align: baseline; color: rgb(61, 61, 61); font-family: intel-clear, arial, helvetica, 'helvetica neue', verdana, sans-serif !important;"><SPAN style="color: rgb(0, 0, 0); font-style: inherit;">I would be grateful if you or anyone could help me in this regard.</SPAN></P> <P style="margin-bottom: 0px; border: 0px; font-size: 12px; vertical-align: baseline; color: rgb(61, 61, 61); font-family: intel-clear, arial, helvetica, 'helvetica neue', verdana, sans-serif !important;"><SPAN style="color: rgb(0, 0, 0); font-style: inherit;">Thanks,</SPAN></P> <P style="margin-bottom: 0px; border: 0px; font-size: 12px; vertical-align: baseline; color: rgb(61, 61, 61); font-family: intel-clear, arial, helvetica, 'helvetica neue', verdana, sans-serif !important;"><SPAN style="color: rgb(0, 0, 0); font-style: inherit;">Sridutt</SPAN></P> Wed, 07 Oct 2015 15:27:02 GMT https://community.intel.com/t5/Software-Tuning-Performance/Reset-MSR-PKG-POWER-LIMIT-Lock-63-bit/m-p/1007380#M3690 sbhal1 2015-10-07T15:27:02Z