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Agent usage goes to zero at 90% of the chunk - Printable Version

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Agent usage goes to zero at 90% of the chunk - manage - 06-18-2022

Every time my agent gets to about the 90% mark of every chunk, it slows down to almost zero. Up until that point, each 5 second update will show about 1% progress of the chunk. Then when it gets to around 90% each five second update shows about .01% progress. Once it finally finishes that chunk and gets a new one, it's back to it's normal speed. I've added a snippet of the verbose output below.
Server version: 0.12.0
Client version: 0.6.0.10
Hashcat Version: 6.2.5
Command: #HL# -a 1 netgear_wordlist.txt  3Digits.txt


------------------------------------------------------------------------------------------------------------------------------
{'action': 'sendProgress', 'token': 'XXXi', 'chunkId': 338, 'keyspaceProgress': 23590022, 'relativeProgress': 9976, 'speed': 1345692, 'state': 2, 'cracks': [], 'gpuTemp': [32, 39, 46, 47, -1], 'gpuUtil': [0, 0, 0, 0, -1]}
http://hashtop.xxx.net:80 "POST /api/server.php HTTP/1.1" 200 80
b'{"action":"sendProgress","response":"SUCCESS","cracked":0,"skipped":0,"zaps":[]}'
Progress: 99.76% Speed:  1.35MH/s Cracks: 0 Accepted: 0 Skips: 0 Zaps: 0
STATUS  3      SPEED  350284  1000    374622  1000    327571  1000    288947  1000    4267    1000    EXEC_RUNTIME    0.590736        2.620154    3.158287        5.500070        1.002176        CURKU  23590022        PROGRESS        47952942510    47954837160    RECHASH 0
        3      RECSALT 0      2      TEMP    32      39      46      47      -1      REJECTED        0      UTIL    0      0      0
        0      -1
Sending 0 cracks...
{'action': 'sendProgress', 'token': 'XXX', 'chunkId': 338, 'keyspaceProgress': 23590022, 'relativeProgress': 9976, 'speed': 1345691, 'state': 2, 'cracks': [], 'gpuTemp': [32, 39, 46, 47, -1], 'gpuUtil': [0, 0, 0, 0, -1]}
http://hashtop.xxx.net:80 "POST /api/server.php HTTP/1.1" 200 80
b'{"action":"sendProgress","response":"SUCCESS","cracked":0,"skipped":0,"zaps":[]}'
Progress: 99.76% Speed:  1.35MH/s Cracks: 0 Accepted: 0 Skips: 0 Zaps: 0
STATUS  3      SPEED  350284  1000    374622  1000    327571  1000    288947  1000    4267    1000    EXEC_RUNTIME    0.590736        2.620154    3.158287        5.500070        1.012072        CURKU  23590022        PROGRESS        47952962910    47954837160    RECHASH 0
        3      RECSALT 0      2      TEMP    31      39      45      47      -1      REJECTED        0      UTIL    0      0      0
        0      -1
Sending 0 cracks...
{'action': 'sendProgress', 'token': 'XXX', 'chunkId': 338, 'keyspaceProgress': 23590022, 'relativeProgress': 9977, 'speed': 1345691, 'state': 2, 'cracks': [], 'gpuTemp': [31, 39, 45, 47, -1], 'gpuUtil': [0, 0, 0, 0, -1]}
http://hashtop.xxx.net:80 "POST /api/server.php HTTP/1.1" 200 80
b'{"action":"sendProgress","response":"SUCCESS","cracked":0,"skipped":0,"zaps":[]}'
Progress: 99.77% Speed:  1.35MH/s Cracks: 0 Accepted: 0 Skips: 0 Zaps: 0
STATUS  3      SPEED  350284  1000    374622  1000    327571  1000    288947  1000    4266    1000    EXEC_RUNTIME    0.590736        2.620154    3.158287        5.500070        1.002733        CURKU  23590022        PROGRESS        47952983310    47954837160    RECHASH 0
        3      RECSALT 0      2      TEMP    31      39      45      47      -1      REJECTED        0      UTIL    0      0      0
        0      -1
Sending 0 cracks...
{'action': 'sendProgress', 'token': 'XXX', 'chunkId': 338, 'keyspaceProgress': 23590022, 'relativeProgress': 9977, 'speed': 1345690, 'state': 2, 'cracks': [], 'gpuTemp': [31, 39, 45, 47, -1], 'gpuUtil': [0, 0, 0, 0, -1]}
http://hashtop.xxx.net:80 "POST /api/server.php HTTP/1.1" 200 80
b'{"action":"sendProgress","response":"SUCCESS","cracked":0,"skipped":0,"zaps":[]}'
Progress: 99.77% Speed:  1.35MH/s Cracks: 0 Accepted: 0 Skips: 0 Zaps: 0
STATUS  3      SPEED  350284  1000    374622  1000    327571  1000    288947  1000    4265    1000    EXEC_RUNTIME    0.590736        2.620154    3.158287        5.500070        1.009273        CURKU  23590022        PROGRESS        47953006260    47954837160    RECHASH 0
        3      RECSALT 0      2      TEMP    31      38      44      47      -1      REJECTED        0      UTIL    0      0      0
        0      -1
Sending 0 cracks...
{'action': 'sendProgress', 'token': 'XXX', 'chunkId': 338, 'keyspaceProgress': 23590022, 'relativeProgress': 9977, 'speed': 1345689, 'state': 2, 'cracks': [], 'gpuTemp': [31, 38, 44, 47, -1], 'gpuUtil': [0, 0, 0, 0, -1]}
http://hashtop.xxx.net:80 "POST /api/server.php HTTP/1.1" 200 80
b'{"action":"sendProgress","response":"SUCCESS","cracked":0,"skipped":0,"zaps":[]}'
Progress: 99.77% Speed:  1.35MH/s Cracks: 0 Accepted: 0 Skips: 0 Zaps: 0


RE: Agent usage goes to zero at 90% of the chunk - s3in!c - 09-14-2022

This is a behaviour of hashcat at the end of a task/part when only a few kernel calls are remaining and it has to wait for the last ones to complete. The speed which it provides is not influenced by that (as I assume it always calculates based on how much of the cores of the GPU are used).