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2026-07-06 - 19:19

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #e, slot #4

Rack #0/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #1/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #2/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #3/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #4/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #5/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #6/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #7/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #8/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #9/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #a/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #b/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #c/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #d/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #e/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #f/#0 #1 #2 #3 #4 #5 #6 #7 #8 
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Click on a legend element to toggle display of that core, ctrl-click inverts display, shift-click enables all.

Data to construct the above plot have been generated using the RT test utility cyclictest.

Total number of samples: 100 million
Resolution of latency scale: normal
Duration: 5 hours, 33 minutes
Compare latency of primary with shadow system
Characteristics of the 376 highest latencies:
System rackeslot4s.osadl.org (updated Mon Jul 06, 2026 12:44:06)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1542196996447,4cyclictest1770404-21latency_hist10:50:010
1542196995648,5cyclictest1780700-21latency_hist11:00:000
1542207995147,3cyclictest1503726-21kworker/u8:2+events_unbound07:10:023
1542196994740,5cyclictest1744652-21latency_hist10:25:010
1542196994234,6cyclictest1692608-21latency_hist09:34:590
1542199994033,5cyclictest1837824-21latency_hist11:55:011
1542203993936,2cyclictest1641156-21kworker/u8:1+flush-259:009:35:202
1542203993935,2cyclictest1723089-21kworker/u8:3+events_unbound10:40:012
1542207993633,2cyclictest1723089-21kworker/u8:3+events_unbound10:30:023
1542207993633,2cyclictest1547401-21kworker/u8:3+events_unbound09:05:163
1542207993632,3cyclictest1796142-21latency_hist11:15:013
1542203993632,3cyclictest335557-21systemd-journal07:39:592
1542199993630,4cyclictest335557-21systemd-journal11:50:001
1542196993631,4cyclictest1827080-21gpgv11:45:010
1542207993532,2cyclictest1503726-21kworker/u8:2+events_unbound07:29:593
1542207993432,2cyclictest1723089-21kworker/u8:3+events_unbound10:02:153
1542207993429,2cyclictest1547401-21kworker/u8:3+events_unbound08:15:173
1542196993429,3cyclictest1547401-21kworker/u8:3+flush-259:008:35:160
1542203993329,3cyclictest1547401-21kworker/u8:3+events_unbound08:15:232
1542203993329,3cyclictest1503726-21kworker/u8:2+flush-259:008:00:012
1542203993328,3cyclictest509-21rs:main2
1542196993328,3cyclictest1754996-21kworker/u8:1+events_unbound11:40:010
1542196993326,5cyclictest1858513-21latency_hist12:15:000
1542207993229,2cyclictest1863387-21kworker/u8:3+events_unbound12:20:223
1542207993229,2cyclictest1754996-21kworker/u8:1+events_unbound10:35:213
1542207993228,3cyclictest1790998-21kworker/u8:3+events_unbound11:58:163
1542203993229,2cyclictest1790998-21kworker/u8:3+flush-259:011:20:002
1542199993228,3cyclictest1525900-21kworker/u8:1+flush-259:007:10:361
1542207993129,2cyclictest1547401-21kworker/u8:3+events_unbound08:05:043
1542207993128,2cyclictest1509138-21kworker/u8:0+flush-259:007:17:153
1542203993128,2cyclictest1790998-21kworker/u8:3+flush-259:011:15:002
1542203993128,2cyclictest1625511-21kworker/u8:0+events_unbound08:50:212
1542203993128,2cyclictest1547401-21kworker/u8:3+flush-259:007:40:142
1542207993028,2cyclictest1641156-21kworker/u8:1+flush-259:009:20:163
1542207993027,2cyclictest1625511-21kworker/u8:0+events_unbound08:30:123
1542203993027,2cyclictest1790998-21kworker/u8:3+flush-259:011:50:182
1542203993027,2cyclictest1625511-21kworker/u8:0+events_unbound09:10:232
1542203993027,2cyclictest1609961-21kworker/u8:4+flush-259:008:39:142
1542203993027,2cyclictest1503726-21kworker/u8:2+events_unbound07:30:212
1542199993026,3cyclictest1625511-21kworker/u8:0+flush-259:008:50:211
1542199993024,4cyclictest1853332-21latency_hist12:10:001
1542207992926,2cyclictest1713467-21kworker/u8:0+events_unbound10:07:153
1542207992926,2cyclictest1641156-21kworker/u8:1+flush-259:008:45:223
1542207992926,2cyclictest1641156-21kworker/u8:1+events_unbound09:45:193
1542207992923,4cyclictest1879120-21latency_hist12:35:003
1542203992926,2cyclictest1775771-21kworker/u8:3+flush-259:011:00:002
1542203992926,2cyclictest1547401-21kworker/u8:3+flush-259:008:55:152
1542203992925,3cyclictest1578551-21kworker/u8:0+events_unbound08:00:232
1542203992925,3cyclictest1578551-21kworker/u8:0+events_unbound08:00:222
1542199992923,4cyclictest335557-21systemd-journal07:26:141
1542196992925,3cyclictest507-21in:imuxsock11:55:010
1542207992826,2cyclictest1547401-21kworker/u8:3+events_unbound09:17:153
1542207992825,2cyclictest1801331-21kworker/u8:0+flush-259:011:50:113
1542207992825,2cyclictest1801331-21kworker/u8:0+events_unbound12:10:133
1542207992825,2cyclictest1589491-21kworker/u8:1+events_unbound07:55:243
1542203992825,2cyclictest1646325-21kworker/u8:2+flush-259:009:40:202
1542199992823,3cyclictest335557-21systemd-journal11:32:141
1542196992825,2cyclictest1609961-21kworker/u8:4+flush-259:008:15:270
1542196992824,3cyclictest1719087-21apt-get10:00:100
1542196992821,5cyclictest335557-21systemd-journal09:50:190
1542207992724,2cyclictest1790998-21kworker/u8:3+events_unbound11:40:233
1542207992724,2cyclictest1754996-21kworker/u8:1+events_unbound11:05:233
1542203992722,3cyclictest335557-21systemd-journal08:07:152
1542199992724,2cyclictest509-21rs:main1
1542199992723,3cyclictest1754996-21kworker/u8:1+events_unbound11:59:141
1542199992723,3cyclictest1588836-21latency_hist07:55:001
1542196992722,4cyclictest1547401-21kworker/u8:3+flush-259:008:50:010
1542207992620,4cyclictest1739462-21latency_hist10:20:013
1542203992623,2cyclictest1863387-21kworker/u8:3+flush-259:012:20:152
1542203992621,4cyclictest1718587-21cp10:00:002
1542199992623,2cyclictest1754996-21kworker/u8:1+events_unbound11:05:211
1542199992622,3cyclictest1677341-21kworker/u8:4+flush-259:009:25:161
1542196992622,3cyclictest1863387-21kworker/u8:3+flush-259:012:20:220
1542207992522,2cyclictest1723089-21kworker/u8:3+events_unbound10:45:193
1542207992522,2cyclictest1547401-21kworker/u8:3+flush-259:007:35:273
1542203992522,2cyclictest1801331-21kworker/u8:0+flush-259:012:10:152
1542199992522,2cyclictest1641156-21kworker/u8:1+events_unbound09:52:161
1542199992521,3cyclictest1503726-21kworker/u8:2+events_unbound07:41:161
1542199992520,4cyclictest1724212-21/usr/sbin/munin10:05:141
1542196992517,6cyclictest1764365-21ntpq10:40:200
1542207992422,2cyclictest1729368-21kworker/u8:4+events_unbound10:11:153
1542207992422,2cyclictest1509138-21kworker/u8:0+events_unbound07:21:163
1542207992421,2cyclictest1790998-21kworker/u8:3+events_unbound11:25:143
1542207992421,2cyclictest1744879-21kworker/u8:0+events_unbound10:25:283
1542207992421,2cyclictest1677341-21kworker/u8:4+events_unbound09:30:133
1542207992421,2cyclictest1646325-21kworker/u8:2+events_unbound09:10:193
1542207992420,3cyclictest1754996-21kworker/u8:1+flush-259:011:35:143
1542203992422,2cyclictest1790998-21kworker/u8:3+flush-259:011:21:082
1542203992421,2cyclictest1837838-21kworker/u8:2+flush-259:012:25:172
1542203992421,2cyclictest1790998-21kworker/u8:3+events_unbound11:25:222
1542203992421,2cyclictest1646325-21kworker/u8:2+events_unbound10:00:182
1542203992421,2cyclictest1547401-21kworker/u8:3+events_unbound08:10:182
1542199992421,2cyclictest1723089-21kworker/u8:3+events_unbound10:38:141
1542199992421,2cyclictest1641156-21kworker/u8:1+events_unbound09:20:181
1542199992421,2cyclictest1503726-21kworker/u8:2+events_unbound07:31:151
1542199992420,3cyclictest1646325-21kworker/u8:2+flush-259:010:00:211
1542199992420,3cyclictest1641156-21kworker/u8:1+events_unbound09:00:151
1542199992418,4cyclictest1847296-21ntpq12:00:241
1542196992420,3cyclictest1723089-21kworker/u8:3+flush-259:010:40:000
1542196992419,3cyclictest1-21systemd09:05:010
1542207992320,2cyclictest1723089-21kworker/u8:3+events_unbound10:20:223
1542207992320,2cyclictest1641156-21kworker/u8:1+flush-259:009:38:353
1542207992320,2cyclictest1615434-21kworker/u8:5+events_unbound08:25:093
1542203992320,2cyclictest1754996-21kworker/u8:1+flush-259:011:05:242
1542203992320,2cyclictest1729368-21kworker/u8:4+events_unbound10:10:202
1542203992320,2cyclictest1615434-21kworker/u8:5+flush-259:008:20:162
1542203992320,2cyclictest1609961-21kworker/u8:4+flush-259:008:40:202
1542203992320,2cyclictest1547401-21kworker/u8:3+events_unbound07:15:262
1542199992320,3cyclictest1578551-21kworker/u8:0+events_unbound08:09:151
1542199992319,3cyclictest1723089-21kworker/u8:3+events_unbound10:45:151
1542199992319,3cyclictest1723089-21kworker/u8:3+events_unbound10:10:141
1542199992319,3cyclictest1703176-21apt-get09:45:111
1542196992320,2cyclictest1547401-21kworker/u8:3+events_unbound07:35:180
1542203992220,2cyclictest1547401-21kworker/u8:3+flush-259:007:25:202
1542203992219,2cyclictest1744879-21kworker/u8:0+flush-259:010:25:262
1542203992219,2cyclictest1641156-21kworker/u8:1+flush-259:009:50:232
1542203992218,3cyclictest1677341-21kworker/u8:4+flush-259:009:50:002
1542203992218,3cyclictest1677341-21kworker/u8:4+events_unbound09:30:152
1542199992219,2cyclictest1729368-21kworker/u8:4+events_unbound10:20:211
1542199992219,2cyclictest1723089-21kworker/u8:3+events_unbound10:18:141
1542199992219,2cyclictest1547401-21kworker/u8:3+flush-259:008:10:201
1542199992218,3cyclictest1790998-21kworker/u8:3+flush-259:011:10:211
1542199992215,5cyclictest1821085-21ntpq11:35:201
1542196992219,2cyclictest1754996-21kworker/u8:1+events_unbound11:05:170
1542196992217,3cyclictest335557-21systemd-journal08:59:150
1542196992217,3cyclictest1713467-21kworker/u8:0+flush-259:010:05:160
1542196992216,4cyclictest1697748-21latency_hist09:40:000
1542207992119,2cyclictest1646325-21kworker/u8:2+events_unbound08:53:163
1542207992119,2cyclictest1547401-21kworker/u8:3+flush-259:007:45:253
1542207992118,2cyclictest1801331-21kworker/u8:0+flush-259:012:15:433
1542207992118,2cyclictest1713467-21kworker/u8:0+events_unbound09:55:153
1542207992118,2cyclictest1646325-21kworker/u8:2+flush-259:010:54:093
1542207992118,2cyclictest1641156-21kworker/u8:1+events_unbound09:00:123
1542203992119,2cyclictest1837838-21kworker/u8:2+flush-259:012:06:152
1542203992119,1cyclictest1775771-21kworker/u8:3+events_unbound11:00:132
1542199992118,2cyclictest1775771-21kworker/u8:3+events_unbound10:57:151
1542199992118,2cyclictest1641156-21kworker/u8:1+flush-259:009:15:161
1542199992118,2cyclictest1615434-21kworker/u8:5+flush-259:008:25:191
1542199992118,2cyclictest1609961-21kworker/u8:4+events_unbound08:40:131
1542199992118,2cyclictest1547401-21kworker/u8:3+events_unbound09:05:241
1542199992118,2cyclictest1509138-21kworker/u8:0+flush-259:007:20:201
1542199992116,3cyclictest1790998-21kworker/u8:3+flush-259:011:20:211
1542196992117,3cyclictest1790998-21kworker/u8:3+flush-259:012:00:240
1542196992115,4cyclictest335557-21systemd-journal09:11:140
1542196992115,4cyclictest1750242-21diskstats10:30:140
1542196992113,7cyclictest1734322-21turbostat10:15:000
1542207992018,2cyclictest1503726-21kworker/u8:2+flush-259:007:41:343
1542207992018,2cyclictest1503726-21kworker/u8:2+flush-259:007:30:563
1542207992017,2cyclictest1754996-21kworker/u8:1+events_unbound11:30:203
1542207992017,2cyclictest1723089-21kworker/u8:3+events_unbound10:40:273
1542207992016,3cyclictest1609936-21latency_hist08:15:013
1542203992017,2cyclictest1801331-21kworker/u8:0+events_unbound12:15:222
1542203992017,2cyclictest1770174-21kworker/u8:0+events_unbound10:50:302
1542203992017,2cyclictest1641156-21kworker/u8:1+flush-259:008:45:212
1542203992017,2cyclictest1509138-21kworker/u8:0+flush-259:007:20:212
1542199992016,3cyclictest1863387-21kworker/u8:3+flush-259:012:20:001
1542199992015,4cyclictest1630595-21latency_hist08:35:011
1542199992014,4cyclictest1868817-21latency_hist12:25:001
1542196992016,2cyclictest0-21swapper/007:45:000
1542196992015,4cyclictest1713467-21kworker/u8:0+flush-259:009:55:170
1542207991917,2cyclictest1848397-21kworker/u8:4+flush-259:012:05:093
1542207991917,2cyclictest1641156-21kworker/u8:1+flush-259:009:44:153
1542207991916,2cyclictest1790998-21kworker/u8:3+events_unbound11:18:573
1542203991917,2cyclictest1723089-21kworker/u8:3+events_unbound10:45:172
1542203991917,1cyclictest1754996-21kworker/u8:1+flush-259:011:30:192
1542203991916,2cyclictest1790998-21kworker/u8:3+events_unbound11:55:162
1542203991915,3cyclictest1641156-21kworker/u8:1+flush-259:009:00:192
1542199991917,2cyclictest1609961-21kworker/u8:4+events_unbound08:39:211
1542199991916,2cyclictest1858539-21kworker/u8:1+events_unbound12:35:131
1542199991916,2cyclictest1790998-21kworker/u8:3+events_unbound11:40:151
1542199991916,2cyclictest1754996-21kworker/u8:1+events_unbound11:15:111
1542199991916,2cyclictest1589491-21kworker/u8:1+events_unbound07:56:151
1542196991916,2cyclictest1547401-21kworker/u8:3+events_unbound07:35:000
1542196991915,3cyclictest1838088-21apt-get11:55:130
1542196991913,4cyclictest1547820-21apt-get07:15:130
1542207991816,2cyclictest1646325-21kworker/u8:2+events_unbound08:55:213
1542207991815,2cyclictest1790998-21kworker/u8:3+flush-259:011:46:583
1542207991815,2cyclictest1770174-21kworker/u8:0+flush-259:011:00:363
1542207991815,2cyclictest1615434-21kworker/u8:5+flush-259:008:20:203
1542207991814,3cyclictest1858539-21kworker/u8:1+flush-259:012:37:343
1542207991814,3cyclictest1754996-21kworker/u8:1+flush-259:012:00:163
1542207991814,3cyclictest1754996-21kworker/u8:1+flush-259:011:24:573
1542207991813,4cyclictest1863387-21kworker/u8:3+flush-259:012:30:003
1542207991812,4cyclictest335557-21systemd-journal08:40:013
1542203991816,2cyclictest1713467-21kworker/u8:0+events_unbound10:05:152
1542203991815,2cyclictest1723089-21kworker/u8:3+events_unbound10:40:212
1542203991815,2cyclictest1578551-21kworker/u8:0+flush-259:007:50:152
1542203991812,4cyclictest1827600-21cp11:45:012
1542199991815,2cyclictest1775771-21kworker/u8:3+events_unbound11:00:161
1542199991815,2cyclictest1723089-21kworker/u8:3+events_unbound10:30:111
1542199991815,2cyclictest1677341-21kworker/u8:4+flush-259:009:30:191
1542199991814,3cyclictest1863387-21kworker/u8:3+flush-259:012:30:141
1542199991814,3cyclictest1837838-21kworker/u8:2+events_unbound12:25:141
1542196991814,3cyclictest1770174-21kworker/u8:0+flush-259:010:50:240
1542196991813,3cyclictest1734583-21apt-get10:15:090
1542196991811,5cyclictest1620307-21latency_hist08:25:010
1542207991714,2cyclictest1589491-21kworker/u8:1+events_unbound08:03:163
1542207991714,2cyclictest1589491-21kworker/u8:1+events_unbound08:03:153
1542207991711,4cyclictest1588854-21https07:55:003
1542203991713,3cyclictest1609961-21kworker/u8:4+flush-259:008:30:182
1542199991714,2cyclictest1692873-21apt-get09:35:091
1542199991714,2cyclictest1641156-21kworker/u8:1+events_unbound09:40:021
1542199991714,2cyclictest1547401-21kworker/u8:3+events_unbound08:15:201
1542196991714,2cyclictest60350irq/132-enp0s29f1:rx-011:15:120
1542196991712,4cyclictest509-21rs:main0
1542196991710,5cyclictest335557-21systemd-journal12:15:140
1542207991614,2cyclictest1775771-21kworker/u8:3+flush-259:010:55:263
1542207991613,2cyclictest1677341-21kworker/u8:4+events_unbound09:25:403
1542207991613,2cyclictest1609961-21kworker/u8:4+events_unbound08:44:563
1542203991613,2cyclictest1801331-21kworker/u8:0+events_unbound11:35:112
1542203991613,2cyclictest1723089-21kworker/u8:3+flush-259:010:30:202
1542199991613,2cyclictest1713467-21kworker/u8:0+flush-259:009:55:201
1542199991612,3cyclictest1509138-21kworker/u8:0+events_unbound07:19:151
1542199991610,4cyclictest335557-21systemd-journal07:36:141
1542196991614,2cyclictest60350irq/132-enp0s29f1:rx-008:51:540
1542196991614,1cyclictest60350irq/132-enp0s29f1:rx-007:47:010
1542196991613,2cyclictest60350irq/132-enp0s29f1:rx-012:08:210
1542196991613,2cyclictest1703592-21irqcore09:45:150
1542196991612,3cyclictest1589278-21apt-config07:55:010
1542196991611,4cyclictest1858539-21kworker/u8:1+flush-259:012:30:200
1542196991610,4cyclictest1620736-21diskstats08:25:140
1542203991512,3cyclictest1729368-21kworker/u8:4+events_unbound10:20:172
1542203991512,3cyclictest1547401-21kworker/u8:3+flush-259:009:19:162
1542203991512,2cyclictest1525900-21kworker/u8:1+flush-259:007:10:342
1542199991511,3cyclictest1615436-21apt-get08:20:131
1542196991513,1cyclictest60350irq/132-enp0s29f1:rx-011:45:210
1542196991513,1cyclictest60350irq/132-enp0s29f1:rx-011:10:170
1542196991513,1cyclictest60350irq/132-enp0s29f1:rx-010:25:260
1542196991513,1cyclictest60350irq/132-enp0s29f1:rx-009:25:520
1542196991513,1cyclictest60350irq/132-enp0s29f1:rx-009:05:240
1542196991513,1cyclictest60350irq/132-enp0s29f1:rx-008:00:220
1542196991513,1cyclictest60350irq/132-enp0s29f1:rx-008:00:210
1542196991512,2cyclictest60350irq/132-enp0s29f1:rx-008:13:440
1542196991512,2cyclictest60350irq/132-enp0s29f1:rx-007:25:190
1542196991511,3cyclictest1837838-21kworker/u8:2+flush-259:012:25:260
1542207991411,2cyclictest1677341-21kworker/u8:4+events_unbound09:50:273
1542203991410,3cyclictest1863387-21kworker/u8:3+events_unbound12:33:302
1542203991410,3cyclictest1503726-21kworker/u8:2+events_unbound07:45:142
1542196991412,2cyclictest60350irq/132-enp0s29f1:rx-011:20:320
1542196991412,2cyclictest60350irq/132-enp0s29f1:rx-008:06:320
1542196991412,1cyclictest60350irq/132-enp0s29f1:rx-011:30:200
1542196991412,1cyclictest60350irq/132-enp0s29f1:rx-011:00:350
1542196991412,1cyclictest60350irq/132-enp0s29f1:rx-008:30:150
1542196991411,2cyclictest60350irq/132-enp0s29f1:rx-012:35:000
1542203991310,2cyclictest1863387-21kworker/u8:3+events_unbound12:39:012
1542203991310,2cyclictest1754996-21kworker/u8:1+events_unbound12:00:152
1542203991310,2cyclictest1677341-21kworker/u8:4+events_unbound09:25:372
1542203991310,2cyclictest1615434-21kworker/u8:5+flush-259:008:25:142
1542203991310,2cyclictest1547401-21kworker/u8:3+events_unbound09:21:232
154219999138,2cyclictest1578551-21kworker/u8:0+events_unbound08:00:201
154219999138,2cyclictest1578551-21kworker/u8:0+events_unbound08:00:201
1542199991310,2cyclictest1646325-21kworker/u8:2+events_unbound10:29:581
1542199991310,2cyclictest1641156-21kworker/u8:1+flush-259:009:12:461
1542199991310,2cyclictest1641156-21kworker/u8:1+flush-259:008:45:181
1542199991310,2cyclictest1641156-21kworker/u8:1+events_unbound08:58:091
1542196991312,1cyclictest61150irq/133-enp0s29f1:tx-009:40:130
1542196991311,2cyclictest60350irq/132-enp0s29f1:rx-011:29:340
1542196991310,2cyclictest60350irq/132-enp0s29f1:rx-009:20:070
1542196991310,2cyclictest60350irq/132-enp0s29f1:rx-007:24:120
1542203991210,2cyclictest1790998-21kworker/u8:3+events_unbound11:40:192
154219999128,3cyclictest1848397-21kworker/u8:4+events_unbound12:15:001
154219999128,3cyclictest1646325-21kworker/u8:2+flush-259:010:54:291
154219999127,4cyclictest1503726-21kworker/u8:2+flush-259:007:45:131
154219699129,2cyclictest1677094-21cron09:20:010
154219699117,2cyclictest1541952-21latency_hist07:10:010
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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