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/openbmc/linux/Documentation/ABI/testing/ |
H A D | sysfs-bus-event_source-devices-hv_24x7 | 792f73f7 Thu Jul 09 00:18:36 CDT 2020 Kajol Jain <kjain@linux.ibm.com> powerpc/hv-24x7: Add sysfs files inside hv-24x7 device to show cpumask
Patch here adds a cpumask attr to hv_24x7 pmu along with ABI documentation.
Primary use to expose the cpumask is for the perf tool which has the capability to parse the driver sysfs folder and understand the cpumask file. Having cpumask file will reduce the number of perf command line parameters (will avoid "-C" option in the perf tool command line). It can also notify the user which is the current cpu used to retrieve the counter data.
command:# cat /sys/devices/hv_24x7/interface/cpumask 0
Signed-off-by: Kajol Jain <kjain@linux.ibm.com> Reviewed-by: Madhavan Srinivasan <maddy@linux.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20200709051836.723765-3-kjain@linux.ibm.com 792f73f7 Thu Jul 09 00:18:36 CDT 2020 Kajol Jain <kjain@linux.ibm.com> powerpc/hv-24x7: Add sysfs files inside hv-24x7 device to show cpumask Patch here adds a cpumask attr to hv_24x7 pmu along with ABI documentation. Primary use to expose the cpumask is for the perf tool which has the capability to parse the driver sysfs folder and understand the cpumask file. Having cpumask file will reduce the number of perf command line parameters (will avoid "-C" option in the perf tool command line). It can also notify the user which is the current cpu used to retrieve the counter data. command:# cat /sys/devices/hv_24x7/interface/cpumask 0 Signed-off-by: Kajol Jain <kjain@linux.ibm.com> Reviewed-by: Madhavan Srinivasan <maddy@linux.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20200709051836.723765-3-kjain@linux.ibm.com
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/openbmc/linux/arch/powerpc/perf/ |
H A D | hv-24x7.c | 792f73f7 Thu Jul 09 00:18:36 CDT 2020 Kajol Jain <kjain@linux.ibm.com> powerpc/hv-24x7: Add sysfs files inside hv-24x7 device to show cpumask
Patch here adds a cpumask attr to hv_24x7 pmu along with ABI documentation.
Primary use to expose the cpumask is for the perf tool which has the capability to parse the driver sysfs folder and understand the cpumask file. Having cpumask file will reduce the number of perf command line parameters (will avoid "-C" option in the perf tool command line). It can also notify the user which is the current cpu used to retrieve the counter data.
command:# cat /sys/devices/hv_24x7/interface/cpumask 0
Signed-off-by: Kajol Jain <kjain@linux.ibm.com> Reviewed-by: Madhavan Srinivasan <maddy@linux.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20200709051836.723765-3-kjain@linux.ibm.com 792f73f7 Thu Jul 09 00:18:36 CDT 2020 Kajol Jain <kjain@linux.ibm.com> powerpc/hv-24x7: Add sysfs files inside hv-24x7 device to show cpumask Patch here adds a cpumask attr to hv_24x7 pmu along with ABI documentation. Primary use to expose the cpumask is for the perf tool which has the capability to parse the driver sysfs folder and understand the cpumask file. Having cpumask file will reduce the number of perf command line parameters (will avoid "-C" option in the perf tool command line). It can also notify the user which is the current cpu used to retrieve the counter data. command:# cat /sys/devices/hv_24x7/interface/cpumask 0 Signed-off-by: Kajol Jain <kjain@linux.ibm.com> Reviewed-by: Madhavan Srinivasan <maddy@linux.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20200709051836.723765-3-kjain@linux.ibm.com
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