Cleanup of existing powerpc topologies and add support for grouping cores. Patch 7 of this patch series: "Powerpc/numa: Detect support for coregroup" depends on https://lore.kernel.org/linuxppc-dev/20200707140644.7241-1-sri...@linux.vnet.ibm.com/t/#u However it should be easy to rebase the patch without the above patch.
On Power 8 Systems ------------------ $ tail /proc/cpuinfo processor : 255 cpu : POWER8 (architected), altivec supported clock : 3724.000000MHz revision : 2.1 (pvr 004b 0201) timebase : 512000000 platform : pSeries model : IBM,8408-E8E machine : CHRP IBM,8408-E8E MMU : Hash Before the patchset ------------------- $ cat /proc/sys/kernel/sched_domain/cpu0/domain*/name SMT DIE NUMA NUMA $ head /proc/schedstat version 15 timestamp 4295534931 cpu0 0 0 0 0 0 0 41389823338 17682779896 14117 domain0 00000000,00000000,00000000,00000000,00000000,00000000,00000000,000000ff 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 domain1 00000000,00000000,00000000,00000000,00000000,00000000,00000000,ffffffff 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 domain2 00000000,00000000,00000000,00000000,00000000,00000000,ffffffff,ffffffff 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 domain3 ffffffff,ffffffff,ffffffff,ffffffff,ffffffff,ffffffff,ffffffff,ffffffff 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 cpu1 0 0 0 0 0 0 27087859050 152273672 10396 domain0 00000000,00000000,00000000,00000000,00000000,00000000,00000000,000000ff 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 domain1 00000000,00000000,00000000,00000000,00000000,00000000,00000000,ffffffff 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 After the patchset ------------------ $ cat /proc/sys/kernel/sched_domain/cpu0/domain*/name SMT DIE NUMA NUMA $ head /proc/schedstat version 15 timestamp 4295534931 cpu0 0 0 0 0 0 0 41389823338 17682779896 14117 domain0 00000000,00000000,00000000,00000000,00000000,00000000,00000000,000000ff 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 domain1 00000000,00000000,00000000,00000000,00000000,00000000,00000000,ffffffff 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 domain2 00000000,00000000,00000000,00000000,00000000,00000000,ffffffff,ffffffff 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 domain3 ffffffff,ffffffff,ffffffff,ffffffff,ffffffff,ffffffff,ffffffff,ffffffff 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 cpu1 0 0 0 0 0 0 27087859050 152273672 10396 domain0 00000000,00000000,00000000,00000000,00000000,00000000,00000000,000000ff 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 domain1 00000000,00000000,00000000,00000000,00000000,00000000,00000000,ffffffff 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 On Power 9 (with device-tree enablement to show coregroups). ----------------------------------------------------------- $ tail /proc/cpuinfo processor : 127 cpu : POWER9 (architected), altivec supported clock : 3000.000000MHz revision : 2.2 (pvr 004e 0202) timebase : 512000000 platform : pSeries model : IBM,9008-22L machine : CHRP IBM,9008-22L MMU : Hash Before patchset -------------- $ cat /proc/sys/kernel/sched_domain/cpu0/domain*/name SMT CACHE DIE NUMA $ head /proc/schedstat version 15 timestamp 4318242208 cpu0 0 0 0 0 0 0 28077107004 4773387362 78205 domain0 00000000,00000000,00000000,00000055 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 domain1 00000000,00000000,00000000,000000ff 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 domain2 00000000,00000000,ffffffff,ffffffff 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 domain3 ffffffff,ffffffff,ffffffff,ffffffff 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 cpu1 0 0 0 0 0 0 24177439200 413887604 75393 domain0 00000000,00000000,00000000,000000aa 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 domain1 00000000,00000000,00000000,000000ff 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 After patchset -------------- $ cat /proc/sys/kernel/sched_domain/cpu0/domain*/name SMT CACHE MC DIE NUMA $ head /proc/schedstat version 15 timestamp 4318242208 cpu0 0 0 0 0 0 0 28077107004 4773387362 78205 domain0 00000000,00000000,00000000,00000055 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 domain1 00000000,00000000,00000000,000000ff 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 domain2 00000000,00000000,00000000,ffffffff 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 domain3 00000000,00000000,ffffffff,ffffffff 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 domain4 ffffffff,ffffffff,ffffffff,ffffffff 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 cpu1 0 0 0 0 0 0 24177439200 413887604 75393 domain0 00000000,00000000,00000000,000000aa 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Cc: linuxppc-dev <linuxppc-dev@lists.ozlabs.org> Cc: Michael Ellerman <micha...@au1.ibm.com> Cc: Nick Piggin <npig...@au1.ibm.com> Cc: Oliver OHalloran <olive...@au1.ibm.com> Cc: Nathan Lynch <nath...@linux.ibm.com> Cc: Michael Neuling <mi...@linux.ibm.com> Cc: Anton Blanchard <an...@au1.ibm.com> Cc: Gautham R Shenoy <e...@linux.vnet.ibm.com> Cc: Vaidyanathan Srinivasan <sva...@linux.ibm.com> Srikar Dronamraju (11): powerpc/smp: Cache node for reuse powerpc/smp: Merge Power9 topology with Power topology powerpc/smp: Move powerpc_topology above powerpc/smp: Enable small core scheduling sooner powerpc/smp: Dont assume l2-cache to be superset of sibling powerpc/smp: Generalize 2nd sched domain Powerpc/numa: Detect support for coregroup powerpc/smp: Allocate cpumask only after searching thread group Powerpc/smp: Create coregroup domain powerpc/smp: Implement cpu_to_coregroup_id powerpc/smp: Provide an ability to disable coregroup arch/powerpc/include/asm/smp.h | 1 + arch/powerpc/include/asm/topology.h | 10 + arch/powerpc/kernel/smp.c | 277 +++++++++++++++++----------- arch/powerpc/mm/numa.c | 56 ++++-- 4 files changed, 226 insertions(+), 118 deletions(-) -- 2.17.1
