PAPI on aarch64
abayomi adekanmbi
--------------------------------------------------------------------------------
PAPI version : 6.0.0.1
Operating system : Linux 4.9.140-tegra
Vendor string and code : ARM_UNKNOWN (0, 0x0)
Model string and code : (0, 0x0)
CPU revision : 0.000000
CPU Max MHz : 1907
CPU Min MHz : 115
Total cores : 6
SMT threads per core : 1
Cores per socket : 2
Sockets : 3
Cores per NUMA region : 6
NUMA regions : 0
Running in a VM : no
Number Hardware Counters : 0
Max Multiplex Counters : 384
Fast counter read (rdpmc): no
--------------------------------------------------------------------------------
Compiled-in components:
Name: perf_event Linux perf_event CPU counters
\-> Disabled: Error libpfm4 no default PMU found
Name: perf_event_uncore Linux perf_event CPU uncore and northbridge
\-> Disabled: No uncore PMUs or events found
Abayomi.
Giuseppe Congiu
William Cohen
> Hi Abayomi,
>
> PAPI supports ARM CPUs. Can you provide some more information about your system? One explanation is that PAPI (and libpfm4) does not yet support the specific PMU of your CPU (as reported by the output of papi_component_avail). Can you attach the output of lscpu or cat /proc/cpuinfo?
>
> Thank you,
> Giuseppe
One other suggestion would be to see whether linux perf works on the machine. From the "Operating system" it looks like this is a NVidia tegra processor, but that could be one of several microarchitectures. Knowing that the kernel supports the performance monitoring hardware is a useful data point. Using linux perf would be a quick check to see whether there are any issues with the kernel supporting the performance monitoring hardware. You should be able to do something like following and see events like instructions and cycles counted:
$ perf stat true
Performance counter stats for 'true':
2.24 msec task-clock:u # 0.052 CPUs utilized
0 context-switches:u # 0.000 /sec
0 cpu-migrations:u # 0.000 /sec
37 page-faults:u # 16.542 K/sec
635,014 cycles:u # 0.284 GHz
122,399 instructions:u # 0.19 insn per cycle
<not supported> branches:u
2,527 branch-misses:u
0.043399590 seconds time elapsed
0.008417000 seconds user
0.000000000 seconds sys
-Will
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abayomi adekanmbi
nvidia@master1:~$ perf stat true
3.154240 task-clock (msec) # 0.353 CPUs utilized
11 context-switches # 0.003 M/sec
0 cpu-migrations # 0.000 K/sec
61 page-faults # 0.019 M/sec
3,179,681 cycles # 1.008 GHz
951,368 instructions # 0.30 insn per cycle
<not supported> branches
19,505 branch-misses
0.008936623 seconds time elapsed
nvidia@master1:~$ lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 18.04.6 LTS
Release: 18.04
Codename: bionic
nvidia@master1:~$ uname -a
Linux master1.dell.com 4.9.140-tegra #1 SMP PREEMPT Thu Aug 20 10:58:23 CST 2020 aarch64 aarch64 aarch64 GNU/Linux
nvidia@master1:~$
abayomi adekanmbi
nvidia@master1:~$ lscpu
Architecture: aarch64
Byte Order: Little Endian
CPU(s): 6
On-line CPU(s) list: 0-3
Off-line CPU(s) list: 4,5
Thread(s) per core: 1
Core(s) per socket: 2
Socket(s): 2
Vendor ID: Nvidia
Model: 0
Model name: ARMv8 Processor rev 0 (v8l)
Stepping: 0x0
CPU max MHz: 1907.2000
CPU min MHz: 115.2000
BogoMIPS: 62.50
L1d cache: 64K
L1i cache: 128K
L2 cache: 2048K
L3 cache: 4096K
Flags: fp asimd evtstrm aes pmull sha1 sha2 crc32 atomics fphp asimdhp
nvidia@master1:~$ cat /proc/cpuinfo
processor : 0
model name : ARMv8 Processor rev 0 (v8l)
BogoMIPS : 62.50
Features : fp asimd evtstrm aes pmull sha1 sha2 crc32 atomics fphp asimdhp
CPU implementer : 0x4e
CPU architecture: 8
CPU variant : 0x0
CPU part : 0x004
CPU revision : 0
MTS version : 50168445
processor : 1
model name : ARMv8 Processor rev 0 (v8l)
BogoMIPS : 62.50
Features : fp asimd evtstrm aes pmull sha1 sha2 crc32 atomics fphp asimdhp
CPU implementer : 0x4e
CPU architecture: 8
CPU variant : 0x0
CPU part : 0x004
CPU revision : 0
MTS version : 50168445
processor : 2
model name : ARMv8 Processor rev 0 (v8l)
BogoMIPS : 62.50
Features : fp asimd evtstrm aes pmull sha1 sha2 crc32 atomics fphp asimdhp
CPU implementer : 0x4e
CPU architecture: 8
CPU variant : 0x0
CPU part : 0x004
CPU revision : 0
MTS version : 50168445
processor : 3
model name : ARMv8 Processor rev 0 (v8l)
BogoMIPS : 62.50
Features : fp asimd evtstrm aes pmull sha1 sha2 crc32 atomics fphp asimdhp
CPU implementer : 0x4e
CPU architecture: 8
CPU variant : 0x0
CPU part : 0x004
CPU revision : 0
MTS version : 50168445
Giuseppe Congiu
[51, perf, "perf_events generic PMU"]
[114, perf_raw, "perf_events raw PMU"]
[151, arm_ac57, "ARM Cortex A57"]
[152, arm_ac53, "ARM Cortex A53"]
[156, arm_xgene, "Applied Micro X-Gene"]
[436, arm_thunderx2, "Cavium ThunderX2"]
[51, perf, "perf_events generic PMU", 82 events, 1 max encoding, 0 counters, OS generic PMU]
[114, perf_raw, "perf_events raw PMU", 1 events, 1 max encoding, 0 counters, OS generic PMU]
[151, arm_ac57, "ARM Cortex A57", 82 events, 1 max encoding, 6 counters, core PMU]
Total events: 1686 available, 165 supported
abayomi adekanmbi
I get this and It seems a little strange because I also can see the detected PMUs.
Supported PMU models:
[51, perf, "perf_events generic PMU”]
[114, perf_raw, "perf_events raw PMU”]
[151, arm_ac57, "ARM Cortex A57”]
[152, arm_ac53, "ARM Cortex A53”]
[156, arm_xgene, "Applied Micro X-Gene”]
[438, tx2_dmc0, "Marvell ThunderX2 Node0 DMC”]
[439, tx2_dmc1, "Marvell ThunderX2 Node1 DMC”]
[440, tx2_llc0, "Marvell ThunderX2 node 0 LLC”]
[441, tx2_llc1, "Marvell ThunderX2 node 1 LLC”]
[442, tx2_ccpi0, "Marvell ThunderX2 node 0 Cross-Socket Interconnect”]
[443, tx2_ccpi1, "Marvell ThunderX2 node 1 Cross-Socket Interconnect”]
Detected PMU models:
[51, perf, "perf_events generic PMU", 82 events, 1 max encoding, 0 counters, OS generic PMU]
[114, perf_raw, "perf_events raw PMU", 1 events, 1 max encoding, 0 counters, OS generic PMU]
Thank you!
Abayomi.
John Linford
William Cohen
> Hi John,
> where i can found the repos for Patches for PAPI and libpfm4 that to fix
Hi,
The current development papi git repo is available at:
https://github.com/icl-utk-edu/papi
Look for changes in papi's src/papi_events.csv file. There should be relatively little else from the presets that would be needed.
There is a bundled libpfm in papi git repos src/libpfm4. However, this might be missing a few patches that are in the upstream libpfm4. For libpfm the upstream repostiory is:
https://sourceforge.net/p/perfmon2/libpfm4/ci/master/tree/
-Will
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