4 Following sections include sample calibration data measured on
5 Denverton server at Intel SH labs.
7 A 2-Node Atom Denverton testing took place at Intel Corporation carefully
8 adhering to FD.io CSIT best practices.
17 BOOT_IMAGE=/boot/vmlinuz-5.4.0-65-generic root=UUID=26ca7b0f-904a-462d-a1c6-98c420c29515 ro audit=0 hpet=disable intel_idle.max_cstate=1 intel_iommu=on intel_pstate=disable iommu=pt isolcpus=1-5 mce=off nmi_watchdog=0 nohz_full=1-5 nosoftlockup numa_balancing=disable processor.max_cstate=1 rcu_nocbs=1-5 tsc=reliable console=tty0 console=ttyS0,115200n8
26 Linux 5.4.0-65-generic #73-Ubuntu SMP Mon Jan 18 17:25:17 UTC 2021 x86_64 x86_64 x86_64 GNU/Linux
29 System-level Core Jitter
30 ^^^^^^^^^^^^^^^^^^^^^^^^
34 $ sudo taskset -c 2 /home/testuser/pma_tools/jitter/jitter -c 2 -i 20
35 Linux Jitter testing program version 1.9
37 The pragram will execute a dummy function 80000 times
38 Display is updated every 20000 displayUpdate intervals
39 Thread affinity will be set to core_id:2
40 Timings are in CPU Core cycles
41 Inst_Min: Minimum Excution time during the display update interval(default is ~1 second)
42 Inst_Max: Maximum Excution time during the display update interval(default is ~1 second)
43 Inst_jitter: Jitter in the Excution time during rhe display update interval. This is the value of interest
44 last_Exec: The Excution time of last iteration just before the display update
45 Abs_Min: Absolute Minimum Excution time since the program started or statistics were reset
46 Abs_Max: Absolute Maximum Excution time since the program started or statistics were reset
47 tmp: Cumulative value calcualted by the dummy function
48 Interval: Time interval between the display updates in Core Cycles
49 Sample No: Sample number
51 Inst_Min Inst_Max Inst_jitter last_Exec Abs_min Abs_max tmp Interval Sample No
52 177530 196100 18570 177530 177530 196100 4156751872 3556820054 1
53 177530 200784 23254 177530 177530 200784 321060864 3556897644 2
54 177530 196346 18816 177530 177530 200784 780337152 3556918674 3
55 177530 195962 18432 177530 177530 200784 1239613440 3556847928 4
56 177530 195960 18430 177530 177530 200784 1698889728 3556860214 5
57 177530 198824 21294 177530 177530 200784 2158166016 3556854934 6
58 177530 198522 20992 177530 177530 200784 2617442304 3556862410 7
59 177530 196362 18832 177530 177530 200784 3076718592 3556851636 8
60 177530 199114 21584 177530 177530 200784 3535994880 3556870846 9
61 177530 197194 19664 177530 177530 200784 3995271168 3556933584 10
62 177530 198272 20742 177536 177530 200784 159580160 3556869044 11
63 177530 197586 20056 177530 177530 200784 618856448 3556903482 12
64 177530 196072 18542 177530 177530 200784 1078132736 3556825540 13
65 177530 196354 18824 177530 177530 200784 1537409024 3556881664 14
66 177530 195906 18376 177530 177530 200784 1996685312 3556839924 15
67 177530 199066 21536 177530 177530 200784 2455961600 3556860220 16
68 177530 196968 19438 177530 177530 200784 2915237888 3556871890 17
69 177530 195896 18366 177530 177530 200784 3374514176 3556855338 18
70 177530 196020 18490 177530 177530 200784 3833790464 3556839820 19
71 177530 196030 18500 177530 177530 200784 4293066752 3556889196 20
79 $ sudo /home/testuser/mlc --bandwidth_matrix
80 Intel(R) Memory Latency Checker - v3.5
81 Command line parameters: --bandwidth_matrix
83 Using buffer size of 100.000MB/thread for reads and an additional 100.000MB/thread for writes
84 Measuring Memory Bandwidths between nodes within system
85 Bandwidths are in MB/sec (1 MB/sec = 1,000,000 Bytes/sec)
86 Using all the threads from each core if Hyper-threading is enabled
87 Using Read-only traffic type
94 $ sudo /home/testuser/mlc --peak_injection_bandwidth
95 Intel(R) Memory Latency Checker - v3.5
96 Command line parameters: --peak_injection_bandwidth
98 Using buffer size of 100.000MB/thread for reads and an additional 100.000MB/thread for writes
100 Measuring Peak Injection Memory Bandwidths for the system
101 Bandwidths are in MB/sec (1 MB/sec = 1,000,000 Bytes/sec)
102 Using all the threads from each core if Hyper-threading is enabled
103 Using traffic with the following read-write ratios
105 3:1 Reads-Writes : 27425.0
106 2:1 Reads-Writes : 27565.4
107 1:1 Reads-Writes : 27489.3
108 Stream-triad like: 26878.2
112 $ sudo /home/testuser/mlc --max_bandwidth
113 Intel(R) Memory Latency Checker - v3.5
114 Command line parameters: --max_bandwidth
116 Using buffer size of 100.000MB/thread for reads and an additional 100.000MB/thread for writes
118 Measuring Maximum Memory Bandwidths for the system
119 Will take several minutes to complete as multiple injection rates will be tried to get the best bandwidth
120 Bandwidths are in MB/sec (1 MB/sec = 1,000,000 Bytes/sec)
121 Using all the threads from each core if Hyper-threading is enabled
122 Using traffic with the following read-write ratios
124 3:1 Reads-Writes : 27450.88
125 2:1 Reads-Writes : 27567.46
126 1:1 Reads-Writes : 27501.90
127 Stream-triad like: 27124.82
135 $ sudo /home/testuser/mlc --latency_matrix
136 Intel(R) Memory Latency Checker - v3.5
137 Command line parameters: --latency_matrix
139 Using buffer size of 2000.000MB
140 Intel(R) Memory Latency Checker - v3.5
141 Measuring idle latencies (in ns)...
148 $ sudo /home/testuser/mlc --idle_latency
149 Intel(R) Memory Latency Checker - v3.5
150 Command line parameters: --idle_latency
152 Using buffer size of 200.000MB
153 Each iteration took 186.7 core clocks ( 93.4 ns)
157 $ sudo /home/testuser/mlc --loaded_latency
158 Intel(R) Memory Latency Checker - v3.5
159 Command line parameters: --loaded_latency
161 Using buffer size of 100.000MB/thread for reads and an additional 100.000MB/thread for writes
163 Measuring Loaded Latencies for the system
164 Using all the threads from each core if Hyper-threading is enabled
165 Using Read-only traffic type
166 Inject Latency Bandwidth
168 ==========================
195 $ sudo /home/testuser/mlc --c2c_latency
196 Intel(R) Memory Latency Checker - v3.5
197 Command line parameters: --c2c_latency
199 Measuring cache-to-cache transfer latency (in ns)...
200 Local Socket L2->L2 HIT latency 8.8
201 Local Socket L2->L2 HITM latency 8.8
203 .. include:: ../introduction/test_environment_sut_meltspec_dnv.rst