== sanity test 255a: check 'lfs ladvise -a willread' ===== 13:33:33 (1789061613)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 11.6514 s, 9.0 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-ffff889b47c1e800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.345271
Iter 1/10: OSS cache speed: 0.360307
Iter 1/10: ladvise speed: 0.335606
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.361136
Iter 2/10: OSS cache speed: 0.325931
Iter 2/10: ladvise speed: 0.270467
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.379837
Iter 3/10: OSS cache speed: 0.291913
Iter 3/10: ladvise speed: 0.35373
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.305229
Iter 4/10: OSS cache speed: 0.297259
Iter 4/10: ladvise speed: 0.26322
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.328376
Iter 5/10: OSS cache speed: 0.360426
Iter 5/10: ladvise speed: 0.332941
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.331219
Iter 6/10: OSS cache speed: 0.347493
Iter 6/10: ladvise speed: 0.319776
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.302601
Iter 7/10: OSS cache speed: 0.333357
Iter 7/10: ladvise speed: 0.349952
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.31686
Iter 8/10: OSS cache speed: 0.321517
Iter 8/10: ladvise speed: 0.33292
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.31638
Iter 9/10: OSS cache speed: 0.323979
Iter 9/10: ladvise speed: 0.304012
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.300623
Iter 10/10: OSS cache speed: 0.388084
Iter 10/10: ladvise speed: 0.343073
Average uncached read: .32
Average speedup with OSS cached read:  .33 = +3%
Average speedup with ladvise willread:  .32 = +0%
Speedup with OSS cached read less than 20%,  got 3%. Skipping ladvise willread check.
fail_loc=0