55 lines · plain
1What: /sys/bus/intel_th/devices/<intel_th_id>-msc<msc-id>/wrap2Date: June 20153KernelVersion: 4.34Contact: Alexander Shishkin <alexander.shishkin@linux.intel.com>5Description: (RW) Configure MSC buffer wrapping. 1 == wrapping enabled.6 7What: /sys/bus/intel_th/devices/<intel_th_id>-msc<msc-id>/mode8Date: June 20159KernelVersion: 4.310Contact: Alexander Shishkin <alexander.shishkin@linux.intel.com>11Description: (RW) Configure MSC operating mode:12 13 - "single", for contiguous buffer mode (high-order alloc);14 - "multi", for multiblock mode;15 - "ExI", for DCI handler mode;16 - "debug", for debug mode;17 - any of the currently loaded buffer sinks.18 19 If operating mode changes, existing buffer is deallocated,20 provided there are no active users and tracing is not enabled,21 otherwise the write will fail.22 23What: /sys/bus/intel_th/devices/<intel_th_id>-msc<msc-id>/nr_pages24Date: June 201525KernelVersion: 4.326Contact: Alexander Shishkin <alexander.shishkin@linux.intel.com>27Description: (RW) Configure MSC buffer size for "single" or "multi" modes.28 29 In single mode, this is a single number of pages, has to be30 power of 2. In multiblock mode, this is a comma-separated list31 of numbers of pages for each window to be allocated. Number of32 windows is not limited.33 34 Writing to this file deallocates existing buffer (provided35 there are no active users and tracing is not enabled) and then36 allocates a new one.37 38What: /sys/bus/intel_th/devices/<intel_th_id>-msc<msc-id>/win_switch39Date: May 201940KernelVersion: 5.241Contact: Alexander Shishkin <alexander.shishkin@linux.intel.com>42Description: (RW) Trigger window switch for the MSC's buffer, in43 multi-window mode. In "multi" mode, accepts writes of "1", thereby44 triggering a window switch for the buffer. Returns an error in any45 other operating mode or attempts to write something other than "1".46 47What: /sys/bus/intel_th/devices/<intel_th_id>-msc<msc-id>/stop_on_full48Date: March 202049KernelVersion: 5.750Contact: Alexander Shishkin <alexander.shishkin@linux.intel.com>51Description: (RW) Configure whether trace stops when the last available window52 becomes full (1/y/Y) or wraps around and continues until the next53 window becomes available again (0/n/N).54 55