| What: /sys/bus/intel_th/devices/<intel_th_id>-msc<msc-id>/wrap |
| Date: June 2015 |
| KernelVersion: 4.3 |
| Contact: Alexander Shishkin <alexander.shishkin@linux.intel.com> |
| Description: (RW) Configure MSC buffer wrapping. 1 == wrapping enabled. |
| |
| What: /sys/bus/intel_th/devices/<intel_th_id>-msc<msc-id>/mode |
| Date: June 2015 |
| KernelVersion: 4.3 |
| Contact: Alexander Shishkin <alexander.shishkin@linux.intel.com> |
| Description: (RW) Configure MSC operating mode: |
| |
| - "single", for contiguous buffer mode (high-order alloc); |
| - "multi", for multiblock mode; |
| - "ExI", for DCI handler mode; |
| - "debug", for debug mode; |
| - any of the currently loaded buffer sinks. |
| |
| If operating mode changes, existing buffer is deallocated, |
| provided there are no active users and tracing is not enabled, |
| otherwise the write will fail. |
| |
| What: /sys/bus/intel_th/devices/<intel_th_id>-msc<msc-id>/nr_pages |
| Date: June 2015 |
| KernelVersion: 4.3 |
| Contact: Alexander Shishkin <alexander.shishkin@linux.intel.com> |
| Description: (RW) Configure MSC buffer size for "single" or "multi" modes. |
| |
| In single mode, this is a single number of pages, has to be |
| power of 2. In multiblock mode, this is a comma-separated list |
| of numbers of pages for each window to be allocated. Number of |
| windows is not limited. |
| |
| Writing to this file deallocates existing buffer (provided |
| there are no active users and tracing is not enabled) and then |
| allocates a new one. |
| |
| What: /sys/bus/intel_th/devices/<intel_th_id>-msc<msc-id>/win_switch |
| Date: May 2019 |
| KernelVersion: 5.2 |
| Contact: Alexander Shishkin <alexander.shishkin@linux.intel.com> |
| Description: (RW) Trigger window switch for the MSC's buffer, in |
| multi-window mode. In "multi" mode, accepts writes of "1", thereby |
| triggering a window switch for the buffer. Returns an error in any |
| other operating mode or attempts to write something other than "1". |
| |
| What: /sys/bus/intel_th/devices/<intel_th_id>-msc<msc-id>/stop_on_full |
| Date: March 2020 |
| KernelVersion: 5.7 |
| Contact: Alexander Shishkin <alexander.shishkin@linux.intel.com> |
| Description: (RW) Configure whether trace stops when the last available window |
| becomes full (1/y/Y) or wraps around and continues until the next |
| window becomes available again (0/n/N). |
| |
