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Diffstat (limited to 'README')
| -rw-r--r-- | README | 19 |
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@@ -0,0 +1,19 @@ +Sample event engine for pcilib driver platform + - This driver does not require real PCIe hardware and produces dummy data + * Register values are random + * DMA continuously return current buffer context with anyway modifying it (so it is either 0 or random content) + - The pciDriver should be loaded in 'dummy' mode with the following options + modprobe pciDriver DUMMY_DEVICE=1 + - The driver implements all 3 APIs define by pcilib + * Register protocol generating random numbers (and ignoring 'set' values). The registers are defined via included xml definitions and by DMA engine + * DMA engine just prvoiding unmodified buffers in the memory as fast as possible + * Event engine building a histogram over pre-defined integration period and returning either this histograms or raw data via rawdata-callback mechanism. + The access to raw data via standard getdata mechanism is not implemented as it would inflict significant performance penalty. As well, get_next_event API + call is not implemented and is expected to be implemented (with substantial performance penalities) in pcitool via general-purpose implementation relying + on available 'stream' call. This is general-purpose implementation is not enabled yet, but is available and just need testing. + - The implementation of histograming is single-threaded and not optimized. Some thinking should be put here for real applications to ensure that + * It is fast enough to process expected data stream. Likely multi-processing will be needed here and can be implemented either with OpenMP (question of efficiacy) + or using dedicated threads (see ipecamera event engine for an example of trully multiprocessed event engine). + * If still processing was too slow for some period of time, the system can drop some data and recover operation (in provided example, it will misbehave after + losing the data for a first time) + |