== sanity test 255a: check 'lfs ladvise -a willread' ===== 01:53:40 (1787550820)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 13.6646 s, 7.7 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-ffff8d97852ec000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.388266
Iter 1/10: OSS cache speed: 0.396124
Iter 1/10: ladvise speed: 0.526473
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.310876
Iter 2/10: OSS cache speed: 0.421486
Iter 2/10: ladvise speed: 0.320658
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.379713
Iter 3/10: OSS cache speed: 0.505936
Iter 3/10: ladvise speed: 0.409056
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.423127
Iter 4/10: OSS cache speed: 0.374777
Iter 4/10: ladvise speed: 0.349543
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.42763
Iter 5/10: OSS cache speed: 0.380924
Iter 5/10: ladvise speed: 0.345057
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.368921
Iter 6/10: OSS cache speed: 0.36011
Iter 6/10: ladvise speed: 0.405145
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.4087
Iter 7/10: OSS cache speed: 0.482456
Iter 7/10: ladvise speed: 0.404475
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.385505
Iter 8/10: OSS cache speed: 0.478093
Iter 8/10: ladvise speed: 0.464577
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.441705
Iter 9/10: OSS cache speed: 0.401973
Iter 9/10: ladvise speed: 0.424331
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.45971
Iter 10/10: OSS cache speed: 0.485926
Iter 10/10: ladvise speed: 0.387394
Average uncached read: .39
Average speedup with OSS cached read:  .42 = +7%
Average speedup with ladvise willread:  .40 = +2%
Speedup with OSS cached read less than 20%,  got 7%. Skipping ladvise willread check.
fail_loc=0