Microsoft Surface Pro X (Microsoft SQ1 Qualcomm SC8180X) - ssvb/tinymembench GitHub Wiki
Running Debian 10 in Hyper-V virtual machine, with 8 vCPU allocated. Memory clocks at 2133MHz.
Architecture: aarch64
Byte Order: Little Endian
CPU(s): 8
On-line CPU(s) list: 0-7
Thread(s) per core: 1
Core(s) per socket: 8
Socket(s): 1
Vendor ID: Qualcomm
Model: 14
Stepping: 0xd
BogoMIPS: 38.40
Flags: fp asimd aes pmull sha1 sha2 crc32 atomics fphp asimdhp cpuid asimdrdm lrcpc dcpop asimddp
Compiler flags:
-O3 -march=armv8.2-a -mtune=cortex-a75.cortex-a55
==========================================================================
== Memory bandwidth tests ==
== ==
== Note 1: 1MB = 1000000 bytes ==
== Note 2: Results for 'copy' tests show how many bytes can be ==
== copied per second (adding together read and writen ==
== bytes would have provided twice higher numbers) ==
== Note 3: 2-pass copy means that we are using a small temporary buffer ==
== to first fetch data into it, and only then write it to the ==
== destination (source -> L1 cache, L1 cache -> destination) ==
== Note 4: If sample standard deviation exceeds 0.1%, it is shown in ==
== brackets ==
==========================================================================
C copy backwards : 12442.3 MB/s (5.8%)
C copy backwards (32 byte blocks) : 12567.4 MB/s (2.9%)
C copy backwards (64 byte blocks) : 12717.2 MB/s (1.8%)
C copy : 13679.0 MB/s (1.4%)
C copy prefetched (32 bytes step) : 14011.8 MB/s (1.2%)
C copy prefetched (64 bytes step) : 13911.5 MB/s (0.5%)
C 2-pass copy : 5345.9 MB/s (10.9%)
C 2-pass copy prefetched (32 bytes step) : 8757.7 MB/s (4.0%)
C 2-pass copy prefetched (64 bytes step) : 8025.0 MB/s (1.7%)
C fill : 32692.9 MB/s (11.3%)
C fill (shuffle within 16 byte blocks) : 32590.8 MB/s (0.4%)
C fill (shuffle within 32 byte blocks) : 32490.2 MB/s (0.3%)
C fill (shuffle within 64 byte blocks) : 32638.4 MB/s (0.6%)
---
standard memcpy : 13689.7 MB/s (0.6%)
standard memset : 32481.3 MB/s (6.6%)
---
NEON LDP/STP copy : 13698.7 MB/s (8.7%)
NEON LDP/STP copy pldl2strm (32 bytes step) : 13278.6 MB/s (2.3%)
NEON LDP/STP copy pldl2strm (64 bytes step) : 13252.9 MB/s (0.4%)
NEON LDP/STP copy pldl1keep (32 bytes step) : 13101.1 MB/s (1.9%)
NEON LDP/STP copy pldl1keep (64 bytes step) : 13140.6 MB/s (1.1%)
NEON LD1/ST1 copy : 13496.3 MB/s (0.4%)
NEON STP fill : 32511.8 MB/s (5.9%)
NEON STNP fill : 32770.8 MB/s (8.4%)
ARM LDP/STP copy : 13682.9 MB/s (0.8%)
ARM STP fill : 32467.4 MB/s (2.0%)
ARM STNP fill : 32205.5 MB/s
==========================================================================
== Memory latency test ==
== ==
== Average time is measured for random memory accesses in the buffers ==
== of different sizes. The larger is the buffer, the more significant ==
== are relative contributions of TLB, L1/L2 cache misses and SDRAM ==
== accesses. For extremely large buffer sizes we are expecting to see ==
== page table walk with several requests to SDRAM for almost every ==
== memory access (though 64MiB is not nearly large enough to experience ==
== this effect to its fullest). ==
== ==
== Note 1: All the numbers are representing extra time, which needs to ==
== be added to L1 cache latency. The cycle timings for L1 cache ==
== latency can be usually found in the processor documentation. ==
== Note 2: Dual random read means that we are simultaneously performing ==
== two independent memory accesses at a time. In the case if ==
== the memory subsystem can't handle multiple outstanding ==
== requests, dual random read has the same timings as two ==
== single reads performed one after another. ==
==========================================================================
block size : single random read / dual random read, [MADV_NOHUGEPAGE]
1024 : 0.0 ns / 0.0 ns
2048 : 0.0 ns / 0.0 ns
4096 : 0.0 ns / 0.0 ns
8192 : 0.0 ns / 0.0 ns
16384 : 0.0 ns / 0.0 ns
32768 : 0.0 ns / 0.0 ns
65536 : 0.0 ns / 0.0 ns
131072 : 0.9 ns / 1.2 ns
262144 : 1.7 ns / 2.2 ns
524288 : 3.4 ns / 4.4 ns
1048576 : 9.1 ns / 12.3 ns
2097152 : 12.2 ns / 15.4 ns
4194304 : 16.8 ns / 20.1 ns
8388608 : 64.3 ns / 86.5 ns
16777216 : 100.1 ns / 129.8 ns
33554432 : 127.4 ns / 153.3 ns
67108864 : 146.2 ns / 163.5 ns
block size : single random read / dual random read, [MADV_HUGEPAGE]
1024 : 0.0 ns / 0.0 ns
2048 : 0.0 ns / 0.0 ns
4096 : 0.0 ns / 0.0 ns
8192 : 0.0 ns / 0.0 ns
16384 : 0.0 ns / 0.0 ns
32768 : 0.0 ns / 0.0 ns
65536 : 0.0 ns / 0.0 ns
131072 : 0.8 ns / 1.2 ns
262144 : 1.6 ns / 2.0 ns
524288 : 3.2 ns / 4.1 ns
1048576 : 8.9 ns / 12.3 ns
2097152 : 12.2 ns / 15.3 ns
4194304 : 16.7 ns / 20.4 ns
8388608 : 60.4 ns / 84.4 ns
16777216 : 101.2 ns / 130.0 ns
33554432 : 125.6 ns / 148.5 ns
67108864 : 140.5 ns / 156.2 ns