Benchmarks¶
The benchmark script scripts/benchmark-hoomd.py
runs a suite of I/O benchmarks that measure the time it takes
to write a file, read frames sequentially, and read frames randomly. This script only runs on linux and requires that
the user have no-password sudo
access (set this only temporarily). It flushes filesystem buffers and clears the
cache to provide accurate timings. It is representative of typical use cases, storing position and orientation in
a hoomd schema GSD file at each frame. The benchmark runs at fixed file sizes with varying N (and varying number of
frames) in order to test small block and large block I/O.
SSD¶
Samsung SSD 840 EVO 120GB
Size |
N |
Open (ms) |
Write (MB/s) |
Read (MB/s) |
Random (MB/s) |
Random (ms) |
---|---|---|---|---|---|---|
128 MiB |
32^2 |
2.063 |
45.23 |
64.77 |
50.13 |
0.545 |
128 MiB |
128^2 |
1.091 |
175 |
304.1 |
226.3 |
1.93 |
128 MiB |
1024^2 |
15.56 |
177.7 |
366.2 |
463.8 |
60.4 |
1 GiB |
32^2 |
3.119 |
54.15 |
73.57 |
35.79 |
0.764 |
1 GiB |
128^2 |
1.703 |
227 |
305.2 |
188.3 |
2.32 |
1 GiB |
1024^2 |
8.414 |
175.8 |
425.5 |
474.5 |
59 |
16 GiB |
32^2 |
5.401 |
58.3 |
70.02 |
26.22 |
1.04 |
16 GiB |
128^2 |
5.286 |
134.5 |
330.7 |
152.4 |
2.87 |
16 GiB |
1024^2 |
8.054 |
130 |
406.7 |
465.5 |
60.1 |
NFS¶
10Gb Ethernet connection (Intel X520) through several 10Gb switches into a 100Gb campus backbone into a modern multi-petabyte Isilon fileserver, mounted with NFSv3.
Size |
N |
Open (ms) |
Write (MB/s) |
Read (MB/s) |
Random (MB/s) |
Random (ms) |
---|---|---|---|---|---|---|
128 MiB |
32^2 |
16.34 |
42.24 |
84.79 |
39.24 |
0.697 |
128 MiB |
128^2 |
11.14 |
172.2 |
192.6 |
142.7 |
3.07 |
128 MiB |
1024^2 |
10.16 |
163.5 |
161.1 |
186.3 |
150 |
1 GiB |
32^2 |
18.54 |
56.64 |
76.98 |
18.41 |
1.49 |
1 GiB |
128^2 |
10.93 |
227.6 |
197.1 |
70.84 |
6.18 |
1 GiB |
1024^2 |
17.35 |
253.5 |
166.8 |
155.6 |
180 |
128 GiB |
32^2 |
146.9 |
55.34 |
75.62 |
2.111 |
13 |
128 GiB |
128^2 |
29.95 |
265.3 |
353.5 |
27.03 |
16.2 |
128 GiB |
1024^2 |
34.83 |
319.3 |
225.9 |
116.7 |
240 |
HDD¶
RAID 1 (mdadm) on two ST3000NM0033-9ZM178 drives.
Size |
N |
Open (ms) |
Write (MB/s) |
Read (MB/s) |
Random (MB/s) |
Random (ms) |
---|---|---|---|---|---|---|
128 MiB |
32^2 |
36.43 |
12.92 |
59 |
11.63 |
2.35 |
128 MiB |
128^2 |
29.68 |
72.22 |
175.5 |
48.23 |
9.07 |
128 MiB |
1024^2 |
10.82 |
94.69 |
161.7 |
167.6 |
167 |
1 GiB |
32^2 |
52.85 |
43.03 |
59.43 |
4.943 |
5.53 |
1 GiB |
128^2 |
24.22 |
115.5 |
174 |
33.65 |
13 |
1 GiB |
1024^2 |
31.61 |
123.6 |
153.7 |
151.8 |
184 |
128 GiB |
32^2 |
113.3 |
46.26 |
58.36 |
2.085 |
13.1 |
128 GiB |
128^2 |
90.05 |
141.8 |
146.6 |
21.82 |
20 |
128 GiB |
1024^2 |
51.49 |
139.4 |
139.6 |
140.8 |
199 |