zhangh43
commented
8 months ago EC2 c7g.8xlarge Machine Specification:
ubuntu@~$ lscpu
Architecture: aarch64
CPU op-mode(s): 32-bit, 64-bit
Byte Order: Little Endian
CPU(s): 32
On-line CPU(s) list: 0-31
Thread(s) per core: 1
Core(s) per socket: 32
Socket(s): 1
NUMA node(s): 1
Vendor ID: ARM
Model: 1
Stepping: r1p1
BogoMIPS: 2100.00
L1d cache: 2 MiB
L1i cache: 2 MiB
L2 cache: 32 MiB
L3 cache: 32 MiB
NUMA node0 CPU(s): 0-31
Vulnerability Gather data sampling: Not affected
Vulnerability Itlb multihit: Not affected
Vulnerability L1tf: Not affected
Vulnerability Mds: Not affected
Vulnerability Meltdown: Not affected
Vulnerability Mmio stale data: Not affected
Vulnerability Retbleed: Not affected
Vulnerability Spec rstack overflow: Not affected
Vulnerability Spec store bypass: Mitigation; Speculative Store Bypass disable
d via prctl
Vulnerability Spectre v1: Mitigation; __user pointer sanitization
Vulnerability Spectre v2: Mitigation; CSV2, BHB
Vulnerability Srbds: Not affected
Vulnerability Tsx async abort: Not affected
Flags: fp asimd evtstrm aes pmull sha1 sha2 crc32 a
tomics fphp asimdhp cpuid asimdrdm jscvt fcm
a lrcpc dcpop sha3 sm3 sm4 asimddp sha512 sv
e asimdfhm dit uscat ilrcpc flagm ssbs paca
pacg dcpodp svei8mm svebf16 i8mm bf16 dgh rn
g
Is this a regression?
Yes
Description
On 16 cores machine (EC2 c7g.4xlarge) Get command can reach 500K+ ops.
But on 32 cores machine, Get command ops drops to 240K.
The thread-num on 16 cores machine is set to 14, while on 32 core machine is set to 28
Please provide a link to a minimal reproduction of the bug
No response
Screenshots or videos
Please provide the version you discovered this bug in (check about page for version information)
Anything else?
No response