BM/PMU: Support new SIMD sampling format

Kernel patch series "Support SIMD/eGPRs/SSP registers
sampling for perf" also change SIMD sampling format.
https://lkml.org/lkml/2025/12/3/241

$perf record -I?
 available registers: AX BX CX DX SI DI BP SP IP FLAGS CS SS R8 R9 R10
 R11 R12 R13 R14 R15 R16 R17 R18 R19 R20 R21 R22 R23 R24 R25 R26 R27 R28
 R29 R30 R31 SSP XMM0-15 YMM0-15 ZMM0-31 OPMASK0-7

Signed-off-by: Xudong Hao <xudong.hao@intel.com>

Author: xhao22

BM/pmu/apebs_tests.sh

@@ -26,16 +26,10 @@ usage() {
 __EOF
 }
 
-lbr_test() {
-  level=$1
-  perfdata="pebs.data"
-  logfile="temp.txt"
-  perf record -o "$perfdata" -b -e cycles:"$level" -a sleep 1 2> "$logfile"
-  sample_count=$(grep "sample" $logfile | awk '{print $10}' | tr -cd "0-9")
-  lbr_count=$(perf report -D -i $perfdata| grep -c "branch stack")
-  test_print_trc "sample_count = $sample_count; lbr_count = $lbr_count"
-  [[ $sample_count -eq 0 ]] && die "samples = 0!"
-  [[ $sample_count -eq $lbr_count ]] || die "samples does not match!"
+clear_files() {
+  for i in "$@"; do
+    [[ -f $i ]] && test_print_trc "Remove file: $i" && rm "$i"
+  done;
 }
 
 lbr_test() {
@@ -54,11 +48,25 @@ xmm_test() {
   level=$1
   perfdata="pebs.data"
   logfile="temp.txt"
-  perf record -o "$perfdata" -IXMM0 -e cycles:"$level" -a sleep 1 2> "$logfile"
+  simdfile="simd.txt"
+  local reg_type=0
+  perf record -I? 2>&1|tee $simdfile
+  grep 'XMM0-15' $simdfile > /dev/null && reg_type=0
+  grep 'XMM0 XMM1' $simdfile > /dev/null && reg_type=1
+  if [[ $reg_type -eq 0 ]]; then
+    xmm_reg="XMM"
+    mul=$((2 * 16))
+  elif [[ $reg_type -eq 1 ]]; then
+    xmm_reg="XMM0"
+    mul=2
+  fi
+ 
+  perf record -o $perfdata -I${xmm_reg} -e cycles:"$level" -a sleep 1 2>&1|tee $logfile
   sample_count=$(grep "sample" $logfile | awk '{print $10}' | tr -cd "0-9")
-  count=$(perf report -D -i $perfdata| grep -c "XMM0")
+  count=$(perf report -D -i $perfdata| grep -c "${xmm_reg}")
+  clear_files $perfdata $logfile $simdfile
   test_print_trc "before sample_count = $sample_count; count = $count"
-  sample_count=$((sample_count * 2))
+  sample_count=$((sample_count * mul))
   test_print_trc "after sample_count = $sample_count; count = $count"
   [[ $sample_count -eq 0 ]] && die "samples = 0!"
   [[ $sample_count -eq $count ]] || die "samples does not match!"

BM/pmu/pmu_tests.sh

@@ -215,8 +215,16 @@ arch_pebs_gp_reg_group_test() {
 
 arch_pebs_xer_group_test() {
   level="p"
-#  reg_group_test_more_option "OPMASK0" "opmask0" 1
-  reg_group_test_more_option "YMMH0" "YMMH0" 2
+  simdfile="simd.txt"
+  do_cmd "perf record -I? 2>&1|tee $simdfile"
+  if grep 'YMM0-15' $simdfile > /dev/null; then
+    # All 16 YMM registers are recorded, so 4*16=64
+    reg_group_test_more_option "YMM" "YMM" 64
+    clear_files $simdfile
+  else
+    clear_files $simdfile
+    die "SIMD sampling format is incorrect!"
+  fi
 #  reg_group_test_more_option "ZMMH0" "ZMMLH0" 4
 }