hardware-counters

#!/bin/bash
# Counter-set rotation for CrayPat on Cirrus (AMD EPYC 9825, Zen 5 "Turin",
# family 26). Only 5 hardware counters fit at once, as on ARCHER2.
#
# DIFFERENCES FROM ARCHER2 (EPYC 7742, Zen 2 "Rome", family 23):
#  * Cirrus has NO cray_rapl and NO cray_zenl3 components, so there is no
#    PACKAGE_ENERGY / PP0_ENERGY and no UNC_L3_* here. On ARCHER2 those were
#    free extras on separate registers. PP0/PACKAGE was believed at the time to
#    be the single strongest predictor, which is why it was prioritised; that
#    importance figure has since been RETRACTED (docs/modelling.md). Being on a
#    separate register is exactly what inflated it, so the collection decision
#    was sound even though the inference drawn from it was not, and the
#    predictor, so cross-platform models must drop them.
#  * The Rome 'mem_bw' and 'stalls' predefined groups do not exist on Turin
#    (CounterGroups.amdcpu_fam26modXX defines only 0, 1, fp_stats, default).
#    Set D therefore names the underlying DISPATCH_RESOURCE_STALL_CYCLES_1
#    sub-events directly; LOAD_QUEUE_RSRC_STALL and STORE_QUEUE_RSRC_STALL
#    exist on BOTH platforms, so the load/store stall fractions stay
#    comparable. (Rome's FP_REG_FILE_RSRC_STALL is FP_SCHEDULER_RSRC_STALL on
#    Turin - a near but not exact equivalent, so it is kept out of the shared
#    feature set.)
#  * Cirrus adds presets ARCHER2 lacks (L1_DCM, L2_TCM, VEC_INS, FMA_INS),
#    used in set C.
#
# Sets A, B, E are byte-identical to the ARCHER2 definitions.

case "$1" in
  A) echo "PAPI_FP_OPS,PAPI_FP_INS,PAPI_TOT_INS,PAPI_TOT_CYC" ;;
  B) echo "PAPI_L2_DCM,PAPI_L2_DCH,PAPI_L1_DCA,PAPI_L2_DCR,PAPI_TOT_CYC" ;;
  C) echo "PAPI_L1_DCM,PAPI_L2_TCM,PAPI_VEC_INS,PAPI_FMA_INS,PAPI_TOT_CYC" ;;
  D) echo "DISPATCH_RESOURCE_STALL_CYCLES_1:LOAD_QUEUE_RSRC_STALL,DISPATCH_RESOURCE_STALL_CYCLES_1:STORE_QUEUE_RSRC_STALL,DISPATCH_RESOURCE_STALL_CYCLES_1:FP_SCHEDULER_RSRC_STALL,PAPI_TOT_CYC" ;;
  E) echo "PAPI_BR_INS,PAPI_BR_MSP,PAPI_TLB_DM,PAPI_TOT_CYC,PAPI_TOT_INS" ;;
  *) echo "usage: $0 {A|B|C|D|E}" >&2; exit 1 ;;
esac