Paul Davis wrote: > > nobody can comment much on these graphs when they are generated with > an IDE disk system for which the hdparms set up is not reported.
Now those are reported, see below. > however, it would appear that there are potential problems with the > video adaptor that you have when used with XFree 4.1.99-cvs. it > wouldn't be the first such case. I did some driver hacking and managed to fix it, results with 2.4.16-ll kernel and fixed radeon driver: http://www.pp.song.fi/~visitor/latencytest3/3x256.html > the rest of your results appear OK, though also hard to comment on > because its not clear how the audio interface was configured by > latencytest (2 channels? 10? etc.) 2 channels, 44.1 kHz as the default is. > as a footnote, 2.4.12-ac3 still used the vanRiel VM system, which is > known to perform poorly under extreme system load. Results with 2.4.16-ll are at: http://www.pp.song.fi/~visitor/latencytest2/3x256.html There is nasty problem with disk IO (cache) which I think is fixed in 2.4.17 so I'm not going to hack 2.4.16. - Jussi Laako ----- 8< ------ /dev/hdb: multcount = 16 (on) I/O support = 1 (32-bit) unmaskirq = 1 (on) using_dma = 1 (on) keepsettings = 0 (off) nowerr = 0 (off) readonly = 0 (off) readahead = 8 (on) geometry = 2491/255/63, sectors = 40020624, start = 0 ----------VIA BusMastering IDE Configuration---------------- Driver Version: 3.29 South Bridge: VIA vt82c686b Revision: ISA 0x40 IDE 0x6 Highest DMA rate: UDMA100 BM-DMA base: 0xb800 PCI clock: 33MHz Master Read Cycle IRDY: 0ws Master Write Cycle IRDY: 0ws BM IDE Status Register Read Retry: yes Max DRDY Pulse Width: No limit -----------------------Primary IDE-------Secondary IDE------ Read DMA FIFO flush: yes yes End Sector FIFO flush: no no Prefetch Buffer: yes no Post Write Buffer: yes no Enabled: yes yes Simplex only: no no Cable Type: 80w 80w -------------------drive0----drive1----drive2----drive3----- Transfer Mode: UDMA UDMA DMA UDMA Address Setup: 30ns 30ns 60ns 30ns Cmd Active: 90ns 90ns 90ns 90ns Cmd Recovery: 30ns 30ns 90ns 90ns Data Active: 90ns 90ns 90ns 90ns Data Recovery: 30ns 30ns 90ns 30ns Cycle Time: 30ns 20ns 180ns 30ns Transfer Rate: 66.0MB/s 99.0MB/s 11.0MB/s 66.0MB/s -- PGP key fingerprint: 161D 6FED 6A92 39E2 EB5B 39DD A4DE 63EB C216 1E4B Available at PGP keyservers
