4 Following sections include sample calibration data measured on server running in
5 one of the Intel Xeon Skylake testbeds.
13 BOOT_IMAGE=/boot/vmlinuz-5.15.0-46-generic root=UUID=2d6f4d44-76b1-4343-bc73-c066a3e95b32 ro audit=0 default_hugepagesz=2M hugepagesz=1G hugepages=32 hugepagesz=2M hugepages=32768 hpet=disable intel_idle.max_cstate=1 intel_iommu=on intel_pstate=disable iommu=pt isolcpus=1-23,25-47,49-71,73-95 mce=off nmi_watchdog=0 nohz_full=1-23,25-47,49-71,73-95 nosoftlockup numa_balancing=disable processor.max_cstate=1 rcu_nocbs=1-23,25-47,49-71,73-95 tsc=reliable console=ttyS0,115200n8 quiet
21 Linux 5.15.0-46-generic #49-Ubuntu SMP Thu Aug 4 18:03:25 UTC 2022 x86_64 x86_64 x86_64 GNU/Linux
23 System-level Core Jitter
24 ^^^^^^^^^^^^^^^^^^^^^^^^
28 $ sudo taskset -c 3 /home/testuser/pma_tools/jitter/jitter -i 30
29 Linux Jitter testing program version 1.9
31 The pragram will execute a dummy function 80000 times
32 Display is updated every 20000 displayUpdate intervals
33 Thread affinity will be set to core_id:7
34 Timings are in CPU Core cycles
35 Inst_Min: Minimum Excution time during the display update interval(default is ~1 second)
36 Inst_Max: Maximum Excution time during the display update interval(default is ~1 second)
37 Inst_jitter: Jitter in the Excution time during rhe display update interval. This is the value of interest
38 last_Exec: The Excution time of last iteration just before the display update
39 Abs_Min: Absolute Minimum Excution time since the program started or statistics were reset
40 Abs_Max: Absolute Maximum Excution time since the program started or statistics were reset
41 tmp: Cumulative value calcualted by the dummy function
42 Interval: Time interval between the display updates in Core Cycles
43 Sample No: Sample number
45 Inst_Min,Inst_Max,Inst_jitter,last_Exec,Abs_min,Abs_max,tmp,Interval,Sample No
46 160026,167568,7542,160032,160026,167568,183238656,3204033176,1
47 160026,171174,11148,160028,160026,171174,3563847680,3204142488,2
48 160024,170002,9978,160032,160024,171174,2649489408,3204224288,3
49 160026,169124,9098,160032,160024,171174,1735131136,3204142126,4
50 160026,169096,9070,160030,160024,171174,820772864,3204069082,5
51 160026,168788,8762,160028,160024,171174,4201381888,3204056954,6
52 160024,169196,9172,160030,160024,171174,3287023616,3204364824,7
53 160026,168176,8150,160028,160024,171174,2372665344,3204073670,8
54 160026,169466,9440,160032,160024,171174,1458307072,3204068092,9
55 160026,168858,8832,160032,160024,171174,543948800,3204109862,10
56 160026,169418,9392,160028,160024,171174,3924557824,3204289508,11
57 160026,167776,7750,160032,160024,171174,3010199552,3204089538,12
58 160024,170538,10514,160032,160024,171174,2095841280,3204109170,13
59 160026,169320,9294,160034,160024,171174,1181483008,3204108772,14
60 160026,169976,9950,160034,160024,171174,267124736,3204259754,15
61 160026,166826,6800,160030,160024,171174,3647733760,3204058488,16
62 160026,168314,8288,160032,160024,171174,2733375488,3204110518,17
63 160026,170176,10150,160028,160024,171174,1819017216,3204283146,18
64 160024,168698,8674,160030,160024,171174,904658944,3204162904,19
65 160026,168234,8208,160034,160024,171174,4285267968,3204059562,20