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