ryzen-random-corrected-mce-about-uop-cache

...
[  627.958024] mce: [Hardware Error]: Machine check events logged
[  627.958027] [Hardware Error]: Corrected error, no action required.
[  627.958034] [Hardware Error]: CPU:13 (17:1:1) MC3_STATUS[-|CE|MiscV|-|-|-|-|SyndV|-]: 0x9820000000000150
[  627.958037] [Hardware Error]: IPID: 0x000300b000000000, Syndrome: 0x000000002a000503
[  627.958040] [Hardware Error]: Decode Unit Extended Error Code: 0
[  627.958041] [Hardware Error]: Decode Unit Error: uop cache tag parity error.
[  627.958044] [Hardware Error]: cache level: RESV, tx: INSN, mem-tx: IRD
[ 1250.624254] mce: [Hardware Error]: Machine check events logged
[ 1250.624258] [Hardware Error]: Corrected error, no action required.
[ 1250.624264] [Hardware Error]: CPU:9 (17:1:1) MC3_STATUS[Over|CE|MiscV|-|-|-|-|SyndV|-]: 0xd820000000000150
[ 1250.624268] [Hardware Error]: IPID: 0x000300b000000000, Syndrome: 0x000000002a000503
[ 1250.624271] [Hardware Error]: Decode Unit Extended Error Code: 0
[ 1250.624272] [Hardware Error]: Decode Unit Error: uop cache tag parity error.
[ 1250.624274] [Hardware Error]: cache level: RESV, tx: INSN, mem-tx: IRD
[ 1561.949481] mce: [Hardware Error]: Machine check events logged
[ 1561.949484] [Hardware Error]: Corrected error, no action required.
[ 1561.949490] [Hardware Error]: CPU:15 (17:1:1) MC3_STATUS[-|CE|MiscV|-|-|-|-|SyndV|-]: 0x9820000000000150
[ 1561.949494] [Hardware Error]: IPID: 0x000300b000000000, Syndrome: 0x000000002a000503
[ 1561.949497] [Hardware Error]: Decode Unit Extended Error Code: 0
[ 1561.949498] [Hardware Error]: Decode Unit Error: uop cache tag parity error.
[ 1561.949500] [Hardware Error]: cache level: RESV, tx: INSN, mem-tx: IRD
[ 1873.272876] mce: [Hardware Error]: Machine check events logged
[ 1873.272879] [Hardware Error]: Corrected error, no action required.
[ 1873.272884] [Hardware Error]: CPU:9 (17:1:1) MC3_STATUS[-|CE|MiscV|-|-|-|-|SyndV|-]: 0x9820000000000150
[ 1873.272888] [Hardware Error]: IPID: 0x000300b000000000, Syndrome: 0x000000002a000503
[ 1873.272891] [Hardware Error]: Decode Unit Extended Error Code: 0
[ 1873.272892] [Hardware Error]: Decode Unit Error: uop cache tag parity error.
[ 1873.272894] [Hardware Error]: cache level: RESV, tx: INSN, mem-tx: IRD
[ 2184.592085] mce: [Hardware Error]: Machine check events logged
[ 2184.592088] [Hardware Error]: Corrected error, no action required.
[ 2184.592094] [Hardware Error]: CPU:9 (17:1:1) MC3_STATUS[Over|CE|MiscV|-|-|-|-|SyndV|-]: 0xd820000000000150
[ 2184.592098] [Hardware Error]: IPID: 0x000300b000000000, Syndrome: 0x000000002a000503
[ 2184.592101] [Hardware Error]: Decode Unit Extended Error Code: 0
[ 2184.592103] [Hardware Error]: Decode Unit Error: uop cache tag parity error.
[ 2184.592104] [Hardware Error]: cache level: RESV, tx: INSN, mem-tx: IRD
[ 2495.910045] mce: [Hardware Error]: Machine check events logged
[ 2495.910048] [Hardware Error]: Corrected error, no action required.
[ 2495.910053] [Hardware Error]: CPU:9 (17:1:1) MC3_STATUS[Over|CE|MiscV|-|-|-|-|SyndV|-]: 0xd820000000000150
[ 2495.910057] [Hardware Error]: IPID: 0x000300b000000000, Syndrome: 0x000000002a000503
[ 2495.910060] [Hardware Error]: Decode Unit Extended Error Code: 0
[ 2495.910061] [Hardware Error]: Decode Unit Error: uop cache tag parity error.
[ 2495.910063] [Hardware Error]: cache level: RESV, tx: INSN, mem-tx: IRD
[ 2495.910065] mce: [Hardware Error]: Machine check events logged
[ 2495.910066] [Hardware Error]: Corrected error, no action required.
[ 2495.910068] [Hardware Error]: CPU:11 (17:1:1) MC3_STATUS[-|CE|MiscV|-|-|-|-|SyndV|-]: 0x9820000000000150
[ 2495.910070] [Hardware Error]: IPID: 0x000300b000000000, Syndrome: 0x000000002a000503
[ 2495.910072] [Hardware Error]: Decode Unit Extended Error Code: 0
[ 2495.910073] [Hardware Error]: Decode Unit Error: uop cache tag parity error.
[ 2495.910074] [Hardware Error]: cache level: RESV, tx: INSN, mem-tx: IRD
[ 2807.228798] mce: [Hardware Error]: Machine check events logged
[ 2807.228801] [Hardware Error]: Corrected error, no action required.
[ 2807.228808] [Hardware Error]: CPU:9 (17:1:1) MC3_STATUS[-|CE|MiscV|-|-|-|-|SyndV|-]: 0x9820000000000150
[ 2807.228812] [Hardware Error]: IPID: 0x000300b000000000, Syndrome: 0x000000002a000503
[ 2807.228816] [Hardware Error]: Decode Unit Extended Error Code: 0
[ 2807.228817] [Hardware Error]: Decode Unit Error: uop cache tag parity error.
[ 2807.228819] [Hardware Error]: cache level: RESV, tx: INSN, mem-tx: IRD
[ 2807.228821] mce: [Hardware Error]: Machine check events logged
[ 2807.228821] [Hardware Error]: Corrected error, no action required.
[ 2807.228823] [Hardware Error]: CPU:13 (17:1:1) MC3_STATUS[Over|CE|MiscV|-|-|-|-|SyndV|-]: 0xd820000000000150
[ 2807.228825] [Hardware Error]: IPID: 0x000300b000000000, Syndrome: 0x000000002a000207
[ 2807.228827] [Hardware Error]: Decode Unit Extended Error Code: 0
[ 2807.228828] [Hardware Error]: Decode Unit Error: uop cache tag parity error.
[ 2807.228829] [Hardware Error]: cache level: RESV, tx: INSN, mem-tx: IRD
...

This error itself is harmless since the cpu fixed this issue. However, if this problem happens contiuously, I suggest you to ask AMD with this log.

This log can be shown even if the root cause is not from the problem which I found. I'm not sure your problem is same as mine.

I see, thanks for the heads up.