{code}
/home/g/1/jdk21u-dev/build/release-linux-x86_64/jdk/bin/java -jar /home/g/1/jmh/jmh-samples/target/benchmarks.jar JMHSample_01 -f 1 -i 1 -r 10 -wi 1 -w 10 -prof perf:events=instructions -v EXTRA
...
Forking using command: [perf, stat, --log-fd, 2, --detailed, --detailed, --detailed, --delay, 11000, -e, instructions, /home/g/1/jdk21u-dev/build/release-linux-x86_64/jdk/bin/java, -XX:+UnlockDiagnosticVMOptions, -XX:+UnlockExperimentalVMOptions, -DcompilerBlackholesEnabled=true, -XX:CompileCommandFile=/tmp/jmh64043897194948902compilecommand, -cp, /home/g/1/jmh/jmh-samples/target/benchmarks.jar, org.openjdk.jmh.runner.ForkedMain, 127.0.0.1, 35829]
# Fork: 1 of 1
# Preparing profilers: LinuxPerfProfiler
Events disabled
# Warmup Iteration 1: 2460681904.610 ops/s
Iteration 1: Events enabled
2449719593.732 ops/s

 Performance counter stats for '/home/g/1/jdk21u-dev/build/release-linux-x86_64/jdk/bin/java -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -DcompilerBlackholesEnabled=true -XX:CompileCommandFile=/tmp/jmh64043897194948902compilecommand -cp /home/g/1/jmh/jmh-samples/target/benchmarks.jar org.openjdk.jmh.runner.ForkedMain 127.0.0.1 35829':

   137,154,006,885 instructions (50.00%)
    68,562,705,632 L1-dcache-loads (50.01%)
         2,199,968 L1-dcache-load-misses # 0.00% of all L1-dcache accesses (50.02%)
   <not supported> LLC-loads
   <not supported> LLC-load-misses
        46,754,639 L1-icache-loads (50.04%)
         1,133,224 L1-icache-load-misses # 2.42% of all L1-icache accesses (50.11%)
           364,940 dTLB-loads (50.07%)
           122,019 dTLB-load-misses # 33.44% of all dTLB cache accesses (50.06%)
            73,954 iTLB-loads (50.03%)
            11,945 iTLB-load-misses # 16.15% of all iTLB cache accesses (49.99%)
           586,628 L1-dcache-prefetches (49.96%)
   <not supported> L1-dcache-prefetch-misses

       9.342746225 seconds time elapsed

      20.609231000 seconds user
       0.105270000 seconds sys
{code}

One would expect to only see instructions, e.g.

{code}
$ perf stat -e instructions sleep 1

 Performance counter stats for 'sleep 1':

         1,705,471 instructions

       1.001887415 seconds time elapsed

       0.000000000 seconds user
       0.001356000 seconds sys
{code}

{code}
$ perf stat --log-fd 2 --detailed --detailed --detailed --delay 11000 -e instructions /home/g/1/jdk21u-dev/build/release-linux-x86_64/jdk/bin/java --version
Events disabled
openjdk 21.0.4-internal 2024-07-16
OpenJDK Runtime Environment (build 21.0.4-internal-adhoc.g.jdk21u-dev)
OpenJDK 64-Bit Server VM (build 21.0.4-internal-adhoc.g.jdk21u-dev, mixed mode)
Events enabled

 Performance counter stats for '/home/g/1/jdk21u-dev/build/release-linux-x86_64/jdk/bin/java --version':

     <not counted> instructions
     <not counted> L1-dcache-loads
     <not counted> L1-dcache-load-misses
   <not supported> LLC-loads
   <not supported> LLC-load-misses
     <not counted> L1-icache-loads
     <not counted> L1-icache-load-misses
     <not counted> dTLB-loads
     <not counted> dTLB-load-misses
     <not counted> iTLB-loads
     <not counted> iTLB-load-misses
     <not counted> L1-dcache-prefetches
   <not supported> L1-dcache-prefetch-misses

       0.000002170 seconds time elapsed

       0.000000000 seconds user
       0.000000000 seconds sys


Some events weren't counted. Try disabling the NMI watchdog:
echo 0 > /proc/sys/kernel/nmi_watchdog
perf stat ...
echo 1 > /proc/sys/kernel/nmi_watchdog
{code}

It seems the `perf stat` parameter construction is not right.