== sanity test 255a: check 'lfs ladvise -a willread' ===== 12:29:08 (1709054948)
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 2.90439 s, 36.1 MB/s
ladvise: range [2, 1] is invalid
Provide servers with advice about access patterns for a file.
usage: ladvise [--advice|-a ADVICE] [--start|-s START[kMGT]]
               [--background|-b] [--unset|-u]

               {--end|-e END[kMGT]|--length|-l LENGTH[kMGT]}
               {[--mode|-m [READ,WRITE]}
               <file> ...

ladvise: range [2, 2] is invalid
Provide servers with advice about access patterns for a file.
usage: ladvise [--advice|-a ADVICE] [--start|-s START[kMGT]]
               [--background|-b] [--unset|-u]

               {--end|-e END[kMGT]|--length|-l LENGTH[kMGT]}
               {[--mode|-m [READ,WRITE]}
               <file> ...

ladvise: conflicting arguments of -l and -e
Provide servers with advice about access patterns for a file.
usage: ladvise [--advice|-a ADVICE] [--start|-s START[kMGT]]
               [--background|-b] [--unset|-u]

               {--end|-e END[kMGT]|--length|-l LENGTH[kMGT]}
               {[--mode|-m [READ,WRITE]}
               <file> ...

Synchronous ladvise should wait
fail_val=8
fail_loc=0x237
Asynchronous ladvise shouldn't wait
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.0167374
Iter 1/10: OSS cache speed: 0.0112054
Iter 1/10: ladvise speed: 0.112798
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.00390859
Iter 2/10: OSS cache speed: 0.00721145
Iter 2/10: ladvise speed: 0.0273606
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.126181
Iter 3/10: OSS cache speed: 0.570599
Iter 3/10: ladvise speed: 0.128141
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.493957
Iter 4/10: OSS cache speed: 0.334278
Iter 4/10: ladvise speed: 0.047956
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.0959033
Iter 5/10: OSS cache speed: 0.175786
Iter 5/10: ladvise speed: 0.184106
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.152488
Iter 6/10: OSS cache speed: 0.327483
Iter 6/10: ladvise speed: 0.027683
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.381201
Iter 7/10: OSS cache speed: 0.118808
Iter 7/10: ladvise speed: 0.0734813
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.288358
Iter 8/10: OSS cache speed: 0.0688277
Iter 8/10: ladvise speed: 0.162546
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.0865989
Iter 9/10: OSS cache speed: 0.0944005
Iter 9/10: ladvise speed: 0.151103
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.0427004
Iter 10/10: OSS cache speed: 0.196775
Iter 10/10: ladvise speed: 0.626868
Average uncached read: .16
Average speedup with OSS cached read: .19 = +18.75%
Average speedup with ladvise willread: .15 = +-6.25%
Speedup with OSS cached read less than 20%, got 18.75%. Skipping ladvise willread check.
fail_loc=0