First effort on raw data tape simulation
From GlueXWiki
Output from mc2coda for an empty crate (simulating block mode readout with block size = 1, pulse integral mode readout of FADC's). Each of 16 empty slots generates 4 words (block header, event header, trigger time, block trailer):
<bank content="bank" data_type="0x10" tag="7" num="1" nchildren="1">
<bank content="uint32" data_type="0x1" tag="0" num="1" nwords="64">
0x808c0801 0x90800001 0x98000064 0x88000004 0x80cc0801
0x90c00001 0x98000064 0x88000004 0x810c0801 0x91000001
0x98000064 0x88000004 0x814c0801 0x91400001 0x98000064
0x88000004 0x818c0801 0x91800001 0x98000064 0x88000004
0x81cc0801 0x91c00001 0x98000064 0x88000004 0x820c0801
0x92000001 0x98000064 0x88000004 0x824c0801 0x92400001
0x98000064 0x88000004 0x834c0801 0x93400001 0x98000064
0x88000004 0x838c0801 0x93800001 0x98000064 0x88000004
0x83cc0801 0x93c00001 0x98000064 0x88000004 0x840c0801
0x94000001 0x98000064 0x88000004 0x844c0801 0x94400001
0x98000064 0x88000004 0x848c0801 0x94800001 0x98000064
0x88000004 0x84cc0801 0x94c00001 0x98000064 0x88000004
0x850c0801 0x95000001 0x98000064 0x88000004
</bank>
Proposed compressed mode eliminates empty slots and crates, compresses 4 slot words down to a single slot header word, and eliminates some intermediate banks. This is the first few banks of a compressed event. New slot header word includes slot number and number of hit words to follow:
<bank content="bank" data_type="0x10" tag="65361" num="2" nchildren="40">
<bank content="segment" data_type="0x20" tag="65313" num="63" nchildren="2">
<segment content="uint64" data_type="0xa" tag="1" nwords="2">
0x1 0x64
</segment>
<segment content="uint16" data_type="0x5" tag="1" nwords="2">
0 0
</segment>
</bank>
<bank content="uint32" data_type="0x1" tag="1" num="2" nwords="141">
0xe0900010 0xb8203138 0xc0203138 0xb8403138 0xc0403138
0xb9003138 0xc1003138 0xb9203138 0xc1203138 0xbac03138
0xc2c03138 0xbae03138 0xc2e03138 0xbba03138 0xc3a03138
0xbbb03138 0xc3b03138 0xe0d0000a 0xb8f03138 0xc0f03138
0xb9103138 0xc1103138 0xba103138 0xc2103138 0xba203138
0xc2203138 0xbc703138 0xc4703138 0xe110000a 0xb8e03138
0xc0e03138 0xb9003138 0xc1003138 0xbb403138 0xc3403138
0xbb603138 0xc3603138 0xbc503138 0xc4503138 0xe1500008
0xb8203138 0xc0203138 0xbae03138 0xc2e03138 0xbb003138
0xc3003138 0xbc303138 0xc4303138 0xe1900008 0xbaa03138
0xc2a03138 0xbac03138 0xc2c03138 0xbbe03138 0xc3e03138
0xbc303138 0xc4303138 0xe1d00006 0xbb203138 0xc3203138
0xbb303138 0xc3303138 0xbc503138 0xc4503138 0xe210000a
0xb8203138 0xc0203138 0xb8603138 0xc0603138 0xb8643138
0xc0643138 0xbba03138 0xc3a03138 0xbc103138 0xc4103138
0xe2500006 0xb9103138 0xc1103138 0xb9203138 0xc1203138
0xb9243138 0xc1243138 0xe350000a 0xb8703138 0xc0703138
0xb8e03138 0xc0e03138 0xba603138 0xc2603138 0xba643138
0xc2643138 0xba683138 0xc2683138 0xe390000a 0xb9f03138
0xc1f03138 0xba603138 0xc2603138 0xbc003138 0xc4003138
0xbc043138 0xc4043138 0xbc103138 0xc4103138 0xe3d00002
0xbc103138 0xc4103138 0xe4100006 0xb9903138 0xc1903138
0xb9943138 0xc1943138 0xb9a03138 0xc1a03138 0xe4500008
0xb9f03138 0xc1f03138 0xba303138 0xc2303138 0xbbc03138
0xc3c03138 0xbbf03138 0xc3f03138 0xe4d0000c 0xb8a03138
0xc0a03138 0xb8b03138 0xc0b03138 0xb8e03138 0xc0e03138
0xba603138 0xc2603138 0xba803138 0xc2803138 0xba903138
0xc2903138 0xe5100004 0xbc003138 0xc4003138 0xbc403138
0xc4403138
</bank>
Average mc2coda event size using MC sample from Dave L is 6300 words, compression average is factor of 3:
Ratio of event sizes and number of real hits/event:
In vs Out size:
In and Out size vs nhits:
