== sanity test 255a: check 'lfs ladvise -a willread' ===== 04:21:28 (1780993288)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 11.3507 s, 9.2 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-ffff8c0002ba4800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.358607
Iter 1/10: OSS cache speed: 0.344073
Iter 1/10: ladvise speed: 0.3497
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.412967
Iter 2/10: OSS cache speed: 0.333651
Iter 2/10: ladvise speed: 0.35324
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.389329
Iter 3/10: OSS cache speed: 0.395689
Iter 3/10: ladvise speed: 0.339531
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.353504
Iter 4/10: OSS cache speed: 0.380121
Iter 4/10: ladvise speed: 0.398107
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.343325
Iter 5/10: OSS cache speed: 0.329937
Iter 5/10: ladvise speed: 0.335047
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.401884
Iter 6/10: OSS cache speed: 0.363303
Iter 6/10: ladvise speed: 0.399474
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.388443
Iter 7/10: OSS cache speed: 0.361758
Iter 7/10: ladvise speed: 0.394425
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.409749
Iter 8/10: OSS cache speed: 0.39609
Iter 8/10: ladvise speed: 0.431509
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.386305
Iter 9/10: OSS cache speed: 0.43048
Iter 9/10: ladvise speed: 0.415363
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.378494
Iter 10/10: OSS cache speed: 0.390038
Iter 10/10: ladvise speed: 0.396094
Average uncached read: .38
Average speedup with OSS cached read:  .37 = +-2%
Average speedup with ladvise willread:  .38 = +0%
Speedup with OSS cached read less than 20%,  got -2%. Skipping ladvise willread check.
fail_loc=0