| on init | |
| # Create the directory for the trace instance during early init | |
| chmod 666 /sys/kernel/tracing/instances/irq_gia_google | |
| chmod 666 /sys/kernel/tracing/instances/irq_gia_google/trace | |
| chown system system /sys/kernel/tracing/instances/irq_gia_google | |
| chown system system /sys/kernel/tracing/instances/irq_gia_google/trace | |
| # There are some very high frequency IRQ events happening all the time. Tracing | |
| # them is not absolute necessity, but a flood of them is noise for more interesting | |
| # events that we want to capture. All these high frequency IRQs have virq < 11. | |
| write /sys/kernel/tracing/instances/irq_gia_google/events/irq/filter "irq > 11" | |
| # Keep the buffer size small. This size is practically enough for debug purpose. | |
| # Having low size helps because this entire buffer gets dumped in bugreport. | |
| # Having a large size can impact bugreport size and time it takes to pack/unpack. | |
| write /sys/kernel/tracing/instances/irq_gia_google/buffer_size_kb 64 |