2.6.32-21-generic-pae is a kernel. The 2.6.32-21-generic-pae has been tested via the Phoronix Test Suite in the configurations listed below.
compress-gzip-11-29 - Tests on Ubuntu 10.04, Ubuntu 10.10, Debian unstable, Intel Pentium 4 3.00GHz, Intel 82865G IGP, Intel Celeron 3.20GHz, VIA P4M890, ASUS P5VD2-MX, Intel Core 2 Duo E7600, GeForce 9800 GTX, ASUS P5B-VM SE
lighttest - Tests on Linux, Intel Core Duo L2400, ATI M96 CSP, Kontron CCAL v0102
videotest - Tests on Linux, Intel Core Duo L2400, ATI M96 CSP, Kontron CCAL v0102
lightmark2 - Tests on Linux, Intel Core Duo L2400, ATI M96 CSP, Kontron CCAL v0102
lighttest - Tests on Linux, Intel Core Duo L2400, ATI M96 CSP, Kontron CCAL v0102
lightmark2 - Tests on Linux, Intel Core Duo L2400, ATI M96 CSP, Kontron CCAL v0102
byte-P4-I865G - Tests on Ubuntu 10.04, Intel Pentium 4 3.00GHz, Intel 82865G IGP
cmpr-7zip-i856g - Tests on Ubuntu 10.04, Ubuntu 10.10, Intel Pentium 4 3.00GHz, Intel 82865G IGP, Intel Celeron 3.20GHz, VIA P4M890, ASUS P5VD2-MX
compress-gzip-11-29 - Tests on Ubuntu 10.04, Ubuntu 10.10, Intel Pentium 4 3.00GHz, Intel 82865G IGP, Intel Celeron 3.20GHz, VIA P4M890, ASUS P5VD2-MX
compress-gzip-11-29 - Tests on Ubuntu 10.04, Ubuntu 10.10, Intel Pentium 4 3.00GHz, Intel 82865G IGP, Intel Celeron 3.20GHz, VIA P4M890, ASUS P5VD2-MX
compress-gzip-11-29 - Tests on Ubuntu 10.04, Intel Pentium 4 3.00GHz, Intel 82865G IGP
cmpr-7zip-i856g - Tests on Ubuntu 10.04, Intel Pentium 4 3.00GHz, Intel 82865G IGP
bullet_20101026_1 - Tests on Ubuntu 10.04, Intel Pentium 4 2.40GHz, Intel 82865G IGP, Dell . 0U1325
wed7 - Tests on Ubuntu 10.04, Intel Xeon E5420, VMware SVGA II, Intel 440BX