D. Hugh Redelmeier wrote:
============================== What I'd like to know about your system: Computer brand and model (or motherboard info): video controller: X video driver: RAM: distro: MTRR problem: Fix: glxgears performance change:
I tried it on HW: Asus P5E-VM HDMI MB with G35 chipset video Intel GMA X3500, with "intel" driver 4GB RAM Fedora 10 with kernels 2.6.29.1-15.fc10.i686 and 2.6.29.1-15.fc10.i686.PAE (from koji). "grep write-combining /proc/mtrr" with both kernels produce no output, after boot with "enable_mtrr_cleanup", "grep write-combining /proc/mtrr" gives on both kernels output: reg06: base=0x0d0000000 ( 3328MB), size= 256MB, count=2: write-combining And glxgears outputs: 1) kernel 2.6.29.1-15.fc10.i686 : before: 2262 frames in 5.0 seconds = 452.307 FPS 2272 frames in 5.0 seconds = 454.345 FPS 2262 frames in 5.0 seconds = 452.399 FPS 2262 frames in 5.0 seconds = 452.339 FPS after boot with "enable_mtrr_cleanup": 7456 frames in 5.0 seconds = 1491.186 FPS 7456 frames in 5.0 seconds = 1491.004 FPS 7468 frames in 5.0 seconds = 1493.462 FPS 7469 frames in 5.0 seconds = 1493.752 FPS 7472 frames in 5.0 seconds = 1494.248 FPS 2) 2.6.29.1-15.fc10.i686.PAE : before: 2262 frames in 5.0 seconds = 452.368 FPS 2272 frames in 5.0 seconds = 454.229 FPS 2270 frames in 5.0 seconds = 453.898 FPS 2271 frames in 5.0 seconds = 454.167 FPS 2272 frames in 5.0 seconds = 454.309 FPS 2271 frames in 5.0 seconds = 454.163 FPS after boot with "enable_mtrr_cleanup": 6270 frames in 5.0 seconds = 1253.902 FPS 6276 frames in 5.0 seconds = 1255.051 FPS 6276 frames in 5.0 seconds = 1255.004 FPS 6274 frames in 5.0 seconds = 1254.667 FPS 6223 frames in 5.0 seconds = 1244.498 FPS Performance with kernel without PAE support is (with "enable_mtrr_cleanup") about 15% better compared to kernel with PAE. Compiling Your "mtrr-uncover" fails: cc -Wall -g mtrr-uncover.c -o mtrr-uncover mtrr-uncover.c:114: error: ‘mtrr_type’ redeclared as different kind of symbol /usr/include/asm/mtrr.h:70: error: previous declaration of ‘mtrr_type’ was here make: *** [mtrr-uncover] Error 1 My "/usr/include/asm/mtrr.h" at line 70 declare "mtrr_type" as (lines 68-70): ... /* In the Intel processor's MTRR interface, the MTRR type is always held in an 8 bit field: */ typedef __u8 mtrr_type; ... Regards, Franta Hanzlik -- fedora-list mailing list fedora-list@xxxxxxxxxx To unsubscribe: https://www.redhat.com/mailman/listinfo/fedora-list Guidelines: http://fedoraproject.org/wiki/Communicate/MailingListGuidelines
