xref: /rk3399_ARM-atf/docs/perf/psci-performance-n1sdp.rst (revision 9b65ffefd673fb2781b808024d13039151c17668) 
1Runtime Instrumentation Testing - N1SDP
2=======================================
3
4For this test we used the N1 System Development Platform (`N1SDP`_), which
5contains an SoC consisting of two dual-core Arm N1 clusters.
6
7The following source trees were used:
8
9- `TF-A v2.12-rc0`_
10- `TFTF v2.12-rc0`_
11
12Please see the Runtime Instrumentation :ref:`Testing Methodology
13<Runtime Instrumentation Methodology>` page for more details. The tests were ran
14using the
15`tf-psci-lava-instr/n1sdp-runtime-instrumentation,n1sdp-runtime-instrumentation:n1sdp-fip.tftf-firmware`
16configuration in CI.
17
18Results
19-------
20
21``CPU_SUSPEND`` to deepest power level
22~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
23
24.. table:: ``CPU_SUSPEND`` latencies (µs) to deepest power level in parallel (v2.12)
25
26    +---------+------+----------------+--------+----------------+
27    | Cluster | Core |   Powerdown    | Wakeup |  Cache Flush   |
28    +---------+------+----------------+--------+----------------+
29    |    0    |  0   |      2.58      | 24.14  | 0.28 (-69.57%) |
30    +---------+------+----------------+--------+----------------+
31    |    0    |  0   | 4.24 (-32.27%) |  40.1  |      0.3       |
32    +---------+------+----------------+--------+----------------+
33    |    1    |  0   |      3.58      | 35.54  |      0.28      |
34    +---------+------+----------------+--------+----------------+
35    |    1    |  0   |      3.28      | 42.36  |      0.3       |
36    +---------+------+----------------+--------+----------------+
37
38.. table:: ``CPU_SUSPEND`` latencies (µs) to deepest power level in parallel (v2.11)
39
40    +---------+------+----------------+--------+----------------+
41    | Cluster | Core |   Powerdown    | Wakeup |  Cache Flush   |
42    +---------+------+----------------+--------+----------------+
43    |    0    |  0   | 3.0 (+41.51%)  | 23.14  | 1.2 (+185.71%) |
44    +---------+------+----------------+--------+----------------+
45    |    0    |  0   |      4.6       | 35.86  |      0.3       |
46    +---------+------+----------------+--------+----------------+
47    |    1    |  0   | 3.68 (+33.33%) | 33.36  |      0.3       |
48    +---------+------+----------------+--------+----------------+
49    |    1    |  0   | 3.7 (+40.15%)  |  38.1  |      0.28      |
50    +---------+------+----------------+--------+----------------+
51
52.. table:: ``CPU_SUSPEND`` latencies (µs) to deepest power level in serial (v2.12)
53
54    +---------+------+-----------+--------+-------------+
55    | Cluster | Core | Powerdown | Wakeup | Cache Flush |
56    +---------+------+-----------+--------+-------------+
57    |    0    |  0   |    1.9    |  23.8  |     0.36    |
58    +---------+------+-----------+--------+-------------+
59    |    0    |  0   |    2.26   | 23.86  |     0.34    |
60    +---------+------+-----------+--------+-------------+
61    |    1    |  0   |    2.02   |  23.4  |     0.36    |
62    +---------+------+-----------+--------+-------------+
63    |    1    |  0   |    2.24   | 23.84  |     0.36    |
64    +---------+------+-----------+--------+-------------+
65
66.. table:: ``CPU_SUSPEND`` latencies (µs) to deepest power level in serial (v2.11)
67
68    +---------+------+-----------+--------+-------------+
69    | Cluster | Core | Powerdown | Wakeup | Cache Flush |
70    +---------+------+-----------+--------+-------------+
71    |    0    |  0   |    1.7    | 22.46  |     0.3     |
72    +---------+------+-----------+--------+-------------+
73    |    0    |  0   |    2.28   |  22.5  |     0.3     |
74    +---------+------+-----------+--------+-------------+
75    |    1    |  0   |    2.14   |  21.5  |     0.32    |
76    +---------+------+-----------+--------+-------------+
77    |    1    |  0   |    2.24   | 22.66  |     0.3     |
78    +---------+------+-----------+--------+-------------+
79
80``CPU_SUSPEND`` to power level 0
81~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
82
83.. table:: ``CPU_SUSPEND`` latencies (µs) to power level 0 in parallel (v2.12)
84
85    +---------+------+-----------+--------+----------------+
86    | Cluster | Core | Powerdown | Wakeup |  Cache Flush   |
87    +---------+------+-----------+--------+----------------+
88    |    0    |  0   |    1.46   |  31.7  |      0.32      |
89    +---------+------+-----------+--------+----------------+
90    |    0    |  0   |    2.06   |  35.5  | 0.48 (+60.00%) |
91    +---------+------+-----------+--------+----------------+
92    |    1    |  0   |    1.96   |  35.7  |      0.32      |
93    +---------+------+-----------+--------+----------------+
94    |    1    |  0   |    2.08   | 23.38  |      0.28      |
95    +---------+------+-----------+--------+----------------+
96
97.. table:: ``CPU_SUSPEND`` latencies (µs) to power level 0 in parallel (v2.11)
98
99    +---------+------+----------------+--------+-------------+
100    | Cluster | Core |   Powerdown    | Wakeup | Cache Flush |
101    +---------+------+----------------+--------+-------------+
102    |    0    |  0   | 0.94 (-37.33%) | 30.36  |     0.3     |
103    +---------+------+----------------+--------+-------------+
104    |    0    |  0   |      2.12      | 33.12  |     0.28    |
105    +---------+------+----------------+--------+-------------+
106    |    1    |  0   |      2.08      | 32.56  |     0.3     |
107    +---------+------+----------------+--------+-------------+
108    |    1    |  0   |      2.14      | 21.92  |     0.28    |
109    +---------+------+----------------+--------+-------------+
110
111.. table:: ``CPU_SUSPEND`` latencies (µs) to power level 0 in serial (v2.12)
112
113    +---------+------+-----------+--------+----------------+
114    | Cluster | Core | Powerdown | Wakeup |  Cache Flush   |
115    +---------+------+-----------+--------+----------------+
116    |    0    |  0   |    1.66   | 23.22  |      0.36      |
117    +---------+------+-----------+--------+----------------+
118    |    0    |  0   |    2.58   | 23.72  | 0.78 (+85.71%) |
119    +---------+------+-----------+--------+----------------+
120    |    1    |  0   |    2.02   | 23.84  |      0.38      |
121    +---------+------+-----------+--------+----------------+
122    |    1    |  0   |    2.16   | 23.92  |      0.34      |
123    +---------+------+-----------+--------+----------------+
124
125.. table:: ``CPU_SUSPEND`` latencies (µs) to power level 0 in serial (v2.11)
126
127    +---------+------+-----------+--------+-------------+
128    | Cluster | Core | Powerdown | Wakeup | Cache Flush |
129    +---------+------+-----------+--------+-------------+
130    |    0    |  0   |    1.64   | 21.88  |     0.34    |
131    +---------+------+-----------+--------+-------------+
132    |    0    |  0   |    2.42   | 21.76  |     0.34    |
133    +---------+------+-----------+--------+-------------+
134    |    1    |  0   |    2.02   | 21.14  |     0.32    |
135    +---------+------+-----------+--------+-------------+
136    |    1    |  0   |    2.18   |  22.3  |     0.34    |
137    +---------+------+-----------+--------+-------------+
138
139``CPU_OFF`` on all non-lead CPUs
140~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
141
142``CPU_OFF`` on all non-lead CPUs in sequence then, ``CPU_SUSPEND`` on the lead
143core to the deepest power level.
144
145.. table:: ``CPU_OFF`` latencies (µs) on all non-lead CPUs (v2.12)
146
147    +---------+------+-----------+--------+----------------+
148    | Cluster | Core | Powerdown | Wakeup |  Cache Flush   |
149    +---------+------+-----------+--------+----------------+
150    |    0    |  0   |    1.84   | 23.82  |      0.36      |
151    +---------+------+-----------+--------+----------------+
152    |    0    |  0   |   14.18   | 31.78  | 0.56 (+86.67%) |
153    +---------+------+-----------+--------+----------------+
154    |    1    |  0   |   13.64   | 30.54  |      0.36      |
155    +---------+------+-----------+--------+----------------+
156    |    1    |  0   |   14.18   | 31.82  |      0.68      |
157    +---------+------+-----------+--------+----------------+
158
159.. table:: ``CPU_OFF`` latencies (µs) on all non-lead CPUs (v2.11)
160
161    +---------+------+-----------+--------+----------------+
162    | Cluster | Core | Powerdown | Wakeup |  Cache Flush   |
163    +---------+------+-----------+--------+----------------+
164    |    0    |  0   |    1.96   | 22.44  |      0.38      |
165    +---------+------+-----------+--------+----------------+
166    |    0    |  0   |   13.76   | 30.34  |      0.26      |
167    +---------+------+-----------+--------+----------------+
168    |    1    |  0   |   13.46   | 28.28  |      0.24      |
169    +---------+------+-----------+--------+----------------+
170    |    1    |  0   |   13.84   | 30.06  | 0.28 (-60.00%) |
171    +---------+------+-----------+--------+----------------+
172
173``CPU_VERSION`` in parallel
174~~~~~~~~~~~~~~~~~~~~~~~~~~~
175
176.. table:: ``CPU_VERSION`` latency (µs) in parallel on all cores (v2.12)
177
178    +----------+------+-------------------+
179    | Cluster  | Core |      Latency      |
180    +----------+------+-------------------+
181    |    0     |  0   |        0.14       |
182    +----------+------+-------------------+
183    |    0     |  0   |   0.2 (-28.57%)   |
184    +----------+------+-------------------+
185    |    1     |  0   |        0.2        |
186    +----------+------+-------------------+
187    |    1     |  0   |        0.26       |
188    +----------+------+-------------------+
189
190.. table:: ``CPU_VERSION`` latency (µs) in parallel on all cores (v2.11)
191
192    +-------------+--------+--------------+
193    |   Cluster   |  Core  |   Latency    |
194    +-------------+--------+--------------+
195    |      0      |   0    |     0.12     |
196    +-------------+--------+--------------+
197    |      0      |   0    |     0.24     |
198    +-------------+--------+--------------+
199    |      1      |   0    |     0.2      |
200    +-------------+--------+--------------+
201    |      1      |   0    |     0.26     |
202    +-------------+--------+--------------+
203
204--------------
205
206*Copyright (c) 2023-2025, Arm Limited. All rights reserved.*
207
208.. _TF-A v2.12-rc0: https://review.trustedfirmware.org/plugins/gitiles/TF-A/trusted-firmware-a/+/refs/tags/v2.12-rc0
209.. _TFTF v2.12-rc0: https://review.trustedfirmware.org/plugins/gitiles/TF-A/tf-a-tests/+/refs/tags/v2.12-rc0
210.. _user guide: https://gitlab.arm.com/arm-reference-solutions/arm-reference-solutions-docs/-/blob/master/docs/n1sdp/user-guide.rst
211.. _N1SDP: https://developer.arm.com/documentation/101489/latest
212