Mmio record

[FanShupei]

In simcrtl device, we allocate two WO regs, all writes to them are blindly recorded to mmio-event.jsonl. In the folling format:

{"cycle": 123, event: "uart-write", "value": 1}
{"cycle": 456, event: "profile", "value": 2}

Post-process scripts can rebuilt program outputs and profile events from the event records.

[Avimitin]

Guide to use the latest program instrument and print utilities

Program instrument

#include <emurt.h>

void test() {
    place_counter(1);
    // Place some expensive task here
    place_counter(2);
}

After online driver finish, there should be a mmio-event.jsonl file in current directory contains data like:

{"cycle": 192, "event": "profile", "value": 1}
{"cycle": 1299, "event": "profile", "value": 2}

print

#include <emurt.h>

void test() {
    print_s("Hello, World\n");
}

After online driver finish, there should be a mmio-event.jsonl file in current directory contains data like:

{"cycle": 330, "event": "uart-write", "value": 72}
{"cycle": 404, "event": "uart-write", "value": 101}
{"cycle": 478, "event": "uart-write", "value": 108}
{"cycle": 552, "event": "uart-write", "value": 108}
{"cycle": 626, "event": "uart-write", "value": 111}
{"cycle": 700, "event": "uart-write", "value": 44}
{"cycle": 774, "event": "uart-write", "value": 32}
{"cycle": 848, "event": "uart-write", "value": 87}
{"cycle": 919, "event": "uart-write", "value": 111}
{"cycle": 990, "event": "uart-write", "value": 114}
{"cycle": 1064, "event": "uart-write", "value": 108}
{"cycle": 1138, "event": "uart-write", "value": 100}
{"cycle": 1209, "event": "uart-write", "value": 10}

Those value can be encode to string using following bash script:

$ jq -r 'select(.event == "uart-write") | .value' mmio-event.jsonl | awk '{ printf "%c", $1}'
Hello, World