Re: perf test hybrid failing on 14700K
From: Liang, Kan
Date: Tue Jan 02 2024 - 10:43:38 EST
On 2023-12-23 8:55 a.m., Arnaldo Carvalho de Melo wrote:
> Hi Kan,
>
> I noticed the following problem, are you able to reproduce it?
>
> Happy solstice!
Happy new year!
>
> - Arnaldo
>
> root@number:/home/acme/Downloads# grep "model name" -m1 /proc/cpuinfo
> model name : Intel(R) Core(TM) i7-14700K
> root@number:/home/acme/Downloads# uname -a
> Linux number 6.6.4-200.fc39.x86_64 #1 SMP PREEMPT_DYNAMIC Sun Dec 3 18:13:11 UTC 2023 x86_64 GNU/Linux
> root@number:/home/acme/Downloads# perf -vv
> perf version 6.7.rc6.g63daba4e2861
> dwarf: [ on ] # HAVE_DWARF_SUPPORT
> dwarf_getlocations: [ on ] # HAVE_DWARF_GETLOCATIONS_SUPPORT
> syscall_table: [ on ] # HAVE_SYSCALL_TABLE_SUPPORT
> libbfd: [ OFF ] # HAVE_LIBBFD_SUPPORT
> debuginfod: [ on ] # HAVE_DEBUGINFOD_SUPPORT
> libelf: [ on ] # HAVE_LIBELF_SUPPORT
> libnuma: [ on ] # HAVE_LIBNUMA_SUPPORT
> numa_num_possible_cpus: [ on ] # HAVE_LIBNUMA_SUPPORT
> libperl: [ on ] # HAVE_LIBPERL_SUPPORT
> libpython: [ on ] # HAVE_LIBPYTHON_SUPPORT
> libslang: [ on ] # HAVE_SLANG_SUPPORT
> libcrypto: [ on ] # HAVE_LIBCRYPTO_SUPPORT
> libunwind: [ on ] # HAVE_LIBUNWIND_SUPPORT
> libdw-dwarf-unwind: [ on ] # HAVE_DWARF_SUPPORT
> zlib: [ on ] # HAVE_ZLIB_SUPPORT
> lzma: [ on ] # HAVE_LZMA_SUPPORT
> get_cpuid: [ on ] # HAVE_AUXTRACE_SUPPORT
> bpf: [ on ] # HAVE_LIBBPF_SUPPORT
> aio: [ on ] # HAVE_AIO_SUPPORT
> zstd: [ on ] # HAVE_ZSTD_SUPPORT
> libpfm4: [ on ] # HAVE_LIBPFM
> libtraceevent: [ on ] # HAVE_LIBTRACEEVENT
> bpf_skeletons: [ on ] # HAVE_BPF_SKEL
> root@number:/home/acme/Downloads# perf test 75
> 75: x86 hybrid : FAILED!
The failure should be a regression caused by the a24d9d9dc096 ("perf
parse-events: Make legacy events lower priority than sysfs/JSON")
@@ -1004,10 +1012,19 @@ static int config_term_pmu(struct
perf_event_attr *attr,
err_str, /*help=*/NULL);
return -EINVAL;
}
- attr->type = PERF_TYPE_HARDWARE;
- attr->config = term->val.num;
- if (perf_pmus__supports_extended_type())
- attr->config |= (__u64)pmu->type << PERF_PMU_TYPE_SHIFT;
+ /*
+ * If the PMU has a sysfs or json event prefer it over
+ * legacy. ARM requires this.
+ */
+ if (perf_pmu__have_event(pmu, term->config))
For Intel hybrid, the perf_pmu__have_event() should be always true for
all hw events and hw cache events. So the patch will mistakenly update
the type to TYPE_USER. However, On Intel platforms, the type of the hw
events should be TYPE_HARDWARE.
Seems ARM needs to find another way to distinguish the case.
Ian, any suggestions?
+ term->type_term = PARSE_EVENTS__TERM_TYPE_USER;
+ term->no_value = true;
+ } else {
+ attr->type = PERF_TYPE_HARDWARE;
+ attr->config = term->val.num;
+ if (perf_pmus__supports_extended_type())
+ attr->config |= (__u64)pmu->type << PERF_PMU_TYPE_SHIFT;
+ }
return 0;
}
if (term->type_term == PARSE_EVENTS__TERM_TYPE_USER ||
Thanks,
Kan
> root@number:/home/acme/Downloads# perf test -v 75
> 75: x86 hybrid :
> --- start ---
> test child forked, pid 4111587
> Using CPUID GenuineIntel-6-B7-1
> running test 0 'cpu_core/cpu-cycles/'
> FAILED arch/x86/tests/hybrid.c:30 wrong type
> Event test failure: test 0 'cpu_core/cpu-cycles/'running test 1 '{cpu_core/cpu-cycles/,cpu_core/instructions/}'
> FAILED arch/x86/tests/hybrid.c:42 wrong type
> Event test failure: test 1 '{cpu_core/cpu-cycles/,cpu_core/instructions/}'running test 2 '{cpu-clock,cpu_core/cpu-cycles/}'
> FAILED arch/x86/tests/hybrid.c:65 wrong type
> Event test failure: test 2 '{cpu-clock,cpu_core/cpu-cycles/}'running test 3 '{cpu_core/cpu-cycles/,cpu-clock}'
> FAILED arch/x86/tests/hybrid.c:78 wrong type
> Event test failure: test 3 '{cpu_core/cpu-cycles/,cpu-clock}'running test 4 '{cpu_core/cpu-cycles/k,cpu_core/instructions/u}'
> FAILED arch/x86/tests/hybrid.c:95 wrong type
> Event test failure: test 4 '{cpu_core/cpu-cycles/k,cpu_core/instructions/u}'running test 5 'r1a'
> running test 6 'cpu_core/r1a/'
> running test 7 'cpu_core/config=10,config1,config2=3,period=1000/u'
> WARNING: event 'N/A' not valid (bits 0-1 of config2 '3' not supported by kernel)!
> running test 8 'cpu_core/LLC-loads/'
> test child finished with -1
> ---- end ----
> x86 hybrid: FAILED!
> root@number:/home/acme/Downloads#
>
> root@number:/home/acme/Downloads# perf trace -e perf_event_open perf test -F -v 75
> 75: x86 hybrid :
> --- start ---
> Using CPUID GenuineIntel-6-B7-1
> running test 0 'cpu_core/cpu-cycles/'
> FAILED arch/x86/tests/hybrid.c:30 wrong type
> Event test failure: test 0 'cpu_core/cpu-cycles/'running test 1 '{cpu_core/cpu-cycles/,cpu_core/instructions/}'
> FAILED arch/x86/tests/hybrid.c:42 wrong type
> Event test failure: test 1 '{cpu_core/cpu-cycles/,cpu_core/instructions/}'running test 2 '{cpu-clock,cpu_core/cpu-cycles/}'
> FAILED arch/x86/tests/hybrid.c:65 wrong type
> Event test failure: test 2 '{cpu-clock,cpu_core/cpu-cycles/}'running test 3 '{cpu_core/cpu-cycles/,cpu-clock}'
> FAILED arch/x86/tests/hybrid.c:78 wrong type
> Event test failure: test 3 '{cpu_core/cpu-cycles/,cpu-clock}'running test 4 '{cpu_core/cpu-cycles/k,cpu_core/instructions/u}'
> FAILED arch/x86/tests/hybrid.c:95 wrong type
> Event test failure: test 4 '{cpu_core/cpu-cycles/k,cpu_core/instructions/u}'running test 5 'r1a'
> running test 6 'cpu_core/r1a/'
> running test 7 'cpu_core/config=10,config1,config2=3,period=1000/u'
> WARNING: event 'N/A' not valid (bits 0-1 of config2 '3' not supported by kernel)!
> running test 8 'cpu_core/LLC-loads/'
> ---- end ----
> x86 hybrid: FAILED!
> 0.000 ( 0.008 ms): :4115165/4115165 perf_event_open(attr_uptr: { type: 0 (PERF_TYPE_HARDWARE), config: 0xa00000000, disabled: 1, { bp_len, config2 }: 0x900000000, branch_sample_type: USER|COUNTERS, sample_regs_user: 0x3ecaddffffffff, sample_stack_user: 4115165, clockid: 925535355, sample_regs_intr: 0x8140c90000a8f7, sample_max_stack: 8, sig_data: 120259084288 }, cpu: -1, group_fd: -1, flags: FD_CLOEXEC) = 3
> 0.010 ( 0.002 ms): :4115165/4115165 perf_event_open(attr_uptr: { type: 0 (PERF_TYPE_HARDWARE), config: 0x400000000, disabled: 1, { bp_len, config2 }: 0x900000000, branch_sample_type: USER|COUNTERS, sample_regs_user: 0x3ecaddffffffff, sample_stack_user: 4115165, clockid: 925538919, sample_regs_intr: 0x8140c90000a8f7, sample_max_stack: 8, sig_data: 120259084288 }, cpu: -1, group_fd: -1, flags: FD_CLOEXEC) = 4
> root@number:/home/acme/Downloads# strace -e perf_event_open perf test -F -v 75
> 75: x86 hybrid :
> --- start ---
> Using CPUID GenuineIntel-6-B7-1
> running test 0 'cpu_core/cpu-cycles/'
> FAILED arch/x86/tests/hybrid.c:30 wrong type
> Event test failure: test 0 'cpu_core/cpu-cycles/'running test 1 '{cpu_core/cpu-cycles/,cpu_core/instructions/}'
> FAILED arch/x86/tests/hybrid.c:42 wrong type
> Event test failure: test 1 '{cpu_core/cpu-cycles/,cpu_core/instructions/}'running test 2 '{cpu-clock,cpu_core/cpu-cycles/}'
> FAILED arch/x86/tests/hybrid.c:65 wrong type
> Event test failure: test 2 '{cpu-clock,cpu_core/cpu-cycles/}'running test 3 '{cpu_core/cpu-cycles/,cpu-clock}'
> FAILED arch/x86/tests/hybrid.c:78 wrong type
> Event test failure: test 3 '{cpu_core/cpu-cycles/,cpu-clock}'running test 4 '{cpu_core/cpu-cycles/k,cpu_core/instructions/u}'
> FAILED arch/x86/tests/hybrid.c:95 wrong type
> Event test failure: test 4 '{cpu_core/cpu-cycles/k,cpu_core/instructions/u}'running test 5 'r1a'
> running test 6 'cpu_core/r1a/'
> running test 7 'cpu_core/config=10,config1,config2=3,period=1000/u'
> WARNING: event 'N/A' not valid (bits 0-1 of config2 '3' not supported by kernel)!
> running test 8 'cpu_core/LLC-loads/'
> perf_event_open({type=PERF_TYPE_HARDWARE, size=0 /* PERF_ATTR_SIZE_??? */, config=0xa<<32|PERF_COUNT_HW_CPU_CYCLES, sample_period=0, sample_type=0, read_format=0, disabled=1, precise_ip=0 /* arbitrary skid */, ...}, 0, -1, -1, PERF_FLAG_FD_CLOEXEC) = 3
> perf_event_open({type=PERF_TYPE_HARDWARE, size=0 /* PERF_ATTR_SIZE_??? */, config=0x4<<32|PERF_COUNT_HW_CPU_CYCLES, sample_period=0, sample_type=0, read_format=0, disabled=1, precise_ip=0 /* arbitrary skid */, ...}, 0, -1, -1, PERF_FLAG_FD_CLOEXEC) = 4
> ---- end ----
> x86 hybrid: FAILED!
> +++ exited with 0 +++
> root@number:/home/acme/Downloads#
>