xrestop - unknown app

[SergMarkov15]

(B[0;1;7mres-base Wins GCs Fnts Pxms Misc Pxm mem Other Total PID Identifier
(B[m1e00000 4 33 0 50 93 4543K[50G3K 4546K 6524 cairo-dock
2400000 21 65 1 51 121 1731K[50G5K 1737K 6536 google-chrome
0000000 1 0 2 0 87 1350K[50G4K 1354K ? <unknown>
0400000 0 1 1 1 5 1350K[50G1K 1351K ? <unknown>
0c00000 129 22 1 106 1295[40G264K 34K 299K ? <unknown>
0a00000 12 46 1 12 33[40G145K[50G3K 148K 6502 Claws Mail
1600000 5 27 0 2 17[40G128K[50G1K 129K 6512 parcellite
1800000 4 27 0 2 11[40G128K 1008B 128K 6522 Xpad
1a00000 5 28 1 5 23[14;42H2B[50G2K[58G2K 6523 stjerm
0600000 6 3 1 0 8[15;42H0B[50G1K[58G1K ? <unknown>
0e00000 4 27 0 1 6[16;42H2B 888B 890B 6501 clipboard-daemon
0800000 2 1 0 0 30[17;42H0B 792B 792B ? <unknown>
1000000 2 1 0 0 14[18;42H0B 408B 408B 6504 devilspie
1c00000 0 1 0 0 5[19;42H0B 144B 144B ? <unknown>
2200000 1 1 0 0 0[20;42H0B 48B 48B ? xrestop
2000000 0 1 0 0 1[21;42H0B 48B 48B ? <unknown>
1200000 1 1 0 0 0[22;42H0B 48B 48B ? <unknown>
2600000 0 1 0 0 0[23;42H0B 24B 24B ? <unknown>
1400000 0 1 0 0 0[24;42H0B 24B 24B ? <unknown>

Что это за <unknown> ?