| 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). | |