System view of processes:

               : ------------------ | ------------------ :
               :        cpu 0       |        cpu 1       :
---------------: ------------------ | ------------------ :
Time of Day    : process[pid]   run | process[pid]   run : Stack Trace
----------------------------------------------------------------------------
10:24:17.875423: myproc3[3888]  214 |                    : schedule_timeout    
...
10:24:17.883073:                    | yz[5552]        48 : work_resched     ...
10:24:17.883084:                    | yz[5562]        11 : futex_wait       ...
10:24:17.883103:                    | yz[5552]        18 : work_resched     ...
10:24:17.883113:                    | yz[5560]         9 : futex_wait       ...
10:24:17.883151:                    | yz[5552]        38 : work_resched     ...
10:24:17.883175:                    | yz[5562]        23 : futex_wait       ...
10:24:17.883196:                    | yz[5560]        21 : futex_wait       ...
10:24:17.883211:                    | yz[5552]        14 : schedule_timeout ...
10:24:17.889569: swapper[0]   14145 |                    : cpu_idle         ...
10:24:17.889692: myproc1[3853]  123 |                    : schedule_timeout ...
10:24:17.889781: myproc2[5577]   88 |                    : schedule_timeout ...
10:24:17.889835: abc[4245]       54 |                    : schedule_timeout ...
...


In-depth view of a single process:

               :        cpu 0                 |        cpu 1                :
               : ---------------------------- | --------------------------- :
               :                 run   betwn  |                 run   betwn :
Time of Day    : process[tid]   time    time  | process[tid]   time    time :
-----------------------------------------------------------------------------------------------
...
10:24:17.890170: myproc[3888]    334    14412 |                             :  __skb_recv_datagram ...
10:24:17.898361:                              | myproc[3888]     94    8097 :  work_resched        ...
10:24:17.898806:                              | myproc[3888]     56     388 :  __skb_recv_datagram ...
10:24:17.905296: myproc[3888]    111     6379 |                             :  __skb_recv_datagram ...
10:24:17.915303: myproc[3888]    139     9868 |                             :  __skb_recv_datagram ...
10:24:17.916041: myproc[3888]     14      724 |                             :  __skb_recv_datagram ...
10:24:17.919939: myproc[3888]     16     3881 |                             :  __skb_recv_datagram ...
10:24:17.920047: myproc[3888]     15       93 |                             :  __skb_recv_datagram ...
...


run time is how long the thread ran once scheduled
betwn time is how long the thread went between schedulings


Stack depths snipped to one-level for this example (with schedule_timeout excluded); perf captures the complete stack and you can drop symbols to bring clarity to where a process blocks, for how long, etc.