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SubjectRe: [RFC] block layer support for DMA IOMMU bypass mode II
On Mon, Jul 28, 2003 at 01:15:13PM +0200, Andi Kleen wrote:
> Run it with 100-500 users (reaim -f workfile... -s 100 -e 500 -i 100)
> I tested with ext3 on a single SCSI disk.

andi, davem, jens,
sorry for the long delay. Here's the data for ZX1 using u320 HBA
(LSI 53c1030) and ST373453LC disk (running U160 IIRC).
If you need more runs on this config, please ask.

Executive summary: < %1 difference for this config.

I'd still like to try a 53c1010 but don't have any installed right now.
I suspect 53c1010 is alot less efficient at retrieving SG lists
and will see a bigger difference in perf.


One minor issue when starting re-aim-7, but not during the run:

reaim(343): floating-point assist fault at ip 4000000000017a81, isr 0000020000000008
reaim(343): floating-point assist fault at ip 4000000000017a61, isr 0000020000000008


For the record, I retrieved source from:
http://umn.dl.sourceforge.net/sourceforge/re-aim-7/reaim-0.1.8.tar.gz

This should be renamed to osdl-aim-7 (or something like that).
The name space collision is unfortunate and annoying.

hth,
grant




#define BIO_VMERGE_BOUNDARY 0 /* (ia64_max_iommu_merge_mask + 1) */
iota:/mnt# reaim -f /mnt/usr/local/share/reaim/workfile.new_dbase -s100 -e 500 -i 100

REAIM Workload
Times are in seconds - Child times from tms.cstime and tms.cutime

Num Parent Child Child Jobs per Jobs/min/ Std_dev Std_dev JTI
Forked Time SysTime UTime Minute Child Time Percent
100 110.25 12.67 206.35 5605.19 56.05 3.48 3.29 96
200 219.07 25.56 411.93 5642.06 28.21 7.83 3.73 96
300 327.59 38.23 615.83 5659.46 18.86 12.79 4.09 95
400 436.66 51.19 821.30 5661.19 14.15 18.34 4.42 95
500 548.21 65.76 1029.15 5636.54 11.27 23.34 4.47 95
Max Jobs per Minute 5661.19
iota:/mnt#



#define BIO_VMERGE_BOUNDARY (ia64_max_iommu_merge_mask + 1)

iota:/mnt# PATH=$PATH:/mnt/usr/local/bin
iota:/mnt# reaim -f /mnt/usr/local/share/reaim/workfile.new_dbase -s100 -e 500 -i 100

REAIM Workload
Times are in seconds - Child times from tms.cstime and tms.cutime

Num Parent Child Child Jobs per Jobs/min/ Std_dev Std_dev JTI
Forked Time SysTime UTime Minute Child Time Percent
100 108.72 12.47 203.78 5684.17 56.84 4.46 4.32 95
200 217.64 25.59 408.90 5679.16 28.40 8.65 4.16 95
300 326.48 37.88 613.62 5678.81 18.93 13.80 4.44 95
400 434.87 50.53 817.64 5684.46 14.21 17.40 4.18 95
500 544.69 65.23 1022.92 5672.92 11.35 21.53 4.12 95
Max Jobs per Minute 5684.46
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