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-EPYC Zen2
-~~~~~~~~~
-
-Following sections include sample calibration data measured on server running in
-one of the AMD EPYC testbeds.
-
-Linux cmdline
-^^^^^^^^^^^^^
-
-::
-
- $ cat /proc/cmdline
- BOOT_IMAGE=/boot/vmlinuz-5.15.0-46-generic root=UUID=cac1254f-9426-4ea6-a8db-2554f075db99 ro amd_iommu=on audit=0 default_hugepagesz=2M hugepagesz=1G hugepages=32 hugepagesz=2M hugepages=32768 hpet=disable iommu=pt isolcpus=1-15,17-31,33-47,49-63 nmi_watchdog=0 nohz_full=off nosoftlockup numa_balancing=disable processor.max_cstate=0 rcu_nocbs=1-15,17-31,33-47,49-63 tsc=reliable console=ttyS0,115200n8 quiet
-
-Linux uname
-^^^^^^^^^^^
-
-::
-
- $ uname -a
- Linux s60-t210-sut1 5.15.0-46-generic #49-Ubuntu SMP Thu Aug 4 18:03:25 UTC 2022 x86_64 x86_64 x86_64 GNU/Linux
-
-System-level Core Jitter
-^^^^^^^^^^^^^^^^^^^^^^^^
-
-::
-
- $ sudo taskset -c 3 /home/testuser/pma_tools/jitter/jitter -i 30
- Linux Jitter testing program version 1.9
- Iterations=20
- The pragram will execute a dummy function 80000 times
- Display is updated every 20000 displayUpdate intervals
- Thread affinity will be set to core_id:7
- Timings are in CPU Core cycles
- Inst_Min: Minimum Excution time during the display update interval(default is ~1 second)
- Inst_Max: Maximum Excution time during the display update interval(default is ~1 second)
- Inst_jitter: Jitter in the Excution time during rhe display update interval. This is the value of interest
- last_Exec: The Excution time of last iteration just before the display update
- Abs_Min: Absolute Minimum Excution time since the program started or statistics were reset
- Abs_Max: Absolute Maximum Excution time since the program started or statistics were reset
- tmp: Cumulative value calcualted by the dummy function
- Interval: Time interval between the display updates in Core Cycles
- Sample No: Sample number
-
- Inst_Min,Inst_Max,Inst_jitter,last_Exec,Abs_min,Abs_max,tmp,Interval,Sample No
- 116400,145848,29448,116400,116400,145848,2076377088,2375383296,1
- 116400,145848,29448,116400,116400,145848,388169728,2363555544,2
- 116400,145848,29448,116400,116400,145848,2994929664,2359881480,3
- 116400,145848,29448,116400,116400,145848,1306722304,2367487104,4
- 116400,145848,29448,116400,116400,145848,3913482240,2357721768,5
- 116400,145848,29448,116400,116400,145848,2225274880,2381723112,6
- 116400,145848,29448,116424,116400,145848,537067520,2373138432,7
- 116400,145848,29448,116424,116400,145848,3143827456,2372221464,8
- 116400,145848,29448,116400,116400,145848,1455620096,2365450272,9
- 116400,145848,29448,116400,116400,145848,4062380032,2364814440,10
- 116400,145848,29448,116400,116400,145848,2374172672,2375992608,11
- 116400,145848,29448,116400,116400,145848,685965312,2362608552,12
- 116400,145848,29448,116400,116400,145848,3292725248,2362597944,13
- 116400,145848,29448,145512,116400,145848,1604517888,2370049344,14
- 116400,145848,29448,116400,116400,145848,4211277824,2366291784,15
- 116400,145848,29448,116400,116400,145848,2523070464,2349077352,16
- 116400,145848,29448,116400,116400,145848,834863104,2375406360,17
- 116400,145848,29448,116400,116400,145848,3441623040,2373272976,18
- 116400,145848,29448,116400,116400,145848,1753415680,2382267192,19
- 116400,145848,29448,116400,116400,145848,65208320,2359406040,20