Is there a way to export or compute the CPU utilization graph plotted by Night Systems?

thanksfully from nv-u I could find the sqlite document.

based on the information, COMPOSITE_EVENTS table contains


Table name	COMPOSITE_EVENTS
Column Name	Column Type	Column Description
start	INT NOT NULL	Event start timestamp in nanoseconds.
cpu	INT NOT NULL	ID of CPU this thread was running on.
threadState	INT NOT NULL	Thread state at the moment of sampling.
globalTid	INT NOT NULL	Serialized GlobalId.
cpuCycles	INT NOT NULL	The value of Performance Monitoring Unit (PMU) counter.

and there are several sql examples also,

-- Thread summary calculated using CPU cycles (when available)
SELECT
    globalTid / 0x1000000 % 0x1000000 AS PID,
    globalTid % 0x1000000 AS TID,
    ROUND(100.0 * SUM(cpuCycles) / 
        (
            SELECT SUM(cpuCycles) FROM COMPOSITE_EVENTS 
            GROUP BY globalTid / 0x1000000000000 % 0x100
        ),
        2
    ) as CPU_utilization,
    (SELECT value FROM StringIds WHERE id = 
        (
            SELECT nameId FROM ThreadNames 
            WHERE ThreadNames.globalTid = COMPOSITE_EVENTS.globalTid
        )
    ) as thread_name
FROM COMPOSITE_EVENTS
GROUP BY globalTid
ORDER BY CPU_utilization DESC
LIMIT 10;

results

PID         TID         CPU_utilization  thread_name    
----------  ----------  ---------------  ---------------
19163       19163       98.4             radixSortThrust
19163       19168       1.35             CUPTI worker th
19163       19166       0.25             [NS]         

These are from the documentation. Take a look.