== sanity test 255a: check 'lfs ladvise -a willread' ===== 23:56:13 (1746071773)
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 4.17585 s, 25.1 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
llite.lustre-ffff8800b5ed8800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.928985
Iter 1/10: OSS cache speed: 0.906731
Iter 1/10: ladvise speed: 1.23486
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 1.04768
Iter 2/10: OSS cache speed: 1.20695
Iter 2/10: ladvise speed: 1.54548
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 1.25567
Iter 3/10: OSS cache speed: 1.15959
Iter 3/10: ladvise speed: 1.37836
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 1.5381
Iter 4/10: OSS cache speed: 1.89639
Iter 4/10: ladvise speed: 1.51964
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 1.59224
Iter 5/10: OSS cache speed: 1.20024
Iter 5/10: ladvise speed: 1.04689
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 1.14778
Iter 6/10: OSS cache speed: 1.00849
Iter 6/10: ladvise speed: 0.996736
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.975746
Iter 7/10: OSS cache speed: 0.899326
Iter 7/10: ladvise speed: 0.754179
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.912554
Iter 8/10: OSS cache speed: 0.841048
Iter 8/10: ladvise speed: 0.787523
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.728186
Iter 9/10: OSS cache speed: 0.725015
Iter 9/10: ladvise speed: 0.808315
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.847687
Iter 10/10: OSS cache speed: 0.754706
Iter 10/10: ladvise speed: 0.75792
Average uncached read: 1.09
Average speedup with OSS cached read:  1.05 = +-3%
Average speedup with ladvise willread:  1.08 = +0%
Speedup with OSS cached read less than 20%,  got -3%. Skipping ladvise willread check.
fail_loc=0