runtime: parallel json benchmark leads high CPU usage when go version > 1.15 on ARM64

[botieking98]

Sorry, I accidentally closed the 60043 and open a new one.

I found that the CPU usage increases greatly of newest golang on ARM64 platform. The parallel json benchmarks with latest go resulted in a 50%+ increase CPU usage compared to the old version 1.15.

This can be easily reproduced on ARM64:

1. install golang package
2. download go-jsonbench: https://github.com/kpango/go-json-bench
3. cd go-json-bench && make bench and observe CPU usage

My machine configuration:

Architecture:           aarch64
  CPU op-mode(s):       64-bit
  Byte Order:           Little Endian
CPU(s):                 128
  On-line CPU(s) list:  0-127
Vendor ID:              HiSilicon
  BIOS Vendor ID:       HiSilicon
  Model name:           Kunpeng-920
    BIOS Model name:    Kunpeng 920-6426
    Model:              0
    Thread(s) per core: 1
    Core(s) per socket: 64
    Socket(s):          2
    Stepping:           0x1
    Frequency boost:    disabled
    CPU max MHz:        2600.0000
    CPU min MHz:        200.0000
    BogoMIPS:           200.00
    Flags:              fp asimd evtstrm aes pmull sha1 sha2 crc32 atomics fphp asimdhp cpuid asimdrdm jscvt fcma dcpop asimddp asimdfhm
Caches (sum of all):
  L1d:                  8 MiB (128 instances)
  L1i:                  8 MiB (128 instances)
  L2:                   64 MiB (128 instances)
  L3:                   128 MiB (4 instances)
NUMA:
  NUMA node(s):         4
  NUMA node0 CPU(s):    0-31
  NUMA node1 CPU(s):    32-63
  NUMA node2 CPU(s):    64-95
  NUMA node3 CPU(s):    96-127

The CPU usage is about 2000% for go 1.15.7:

But the CPU usage is about 3000% for go latest version:

[erifan]

You can close this one and reopen issues 60043