== sanity test 255a: check 'lfs ladvise -a willread' ===== 06:10:16 (1789380616)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 16.3364 s, 6.4 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-ffff99ee9053f800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.267392
Iter 1/10: OSS cache speed: 0.354418
Iter 1/10: ladvise speed: 0.352819
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.258884
Iter 2/10: OSS cache speed: 0.30341
Iter 2/10: ladvise speed: 0.306726
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.264352
Iter 3/10: OSS cache speed: 0.31294
Iter 3/10: ladvise speed: 0.280616
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.319912
Iter 4/10: OSS cache speed: 0.399446
Iter 4/10: ladvise speed: 0.358772
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.340216
Iter 5/10: OSS cache speed: 0.392745
Iter 5/10: ladvise speed: 0.294398
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.30369
Iter 6/10: OSS cache speed: 0.373123
Iter 6/10: ladvise speed: 0.386045
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.381204
Iter 7/10: OSS cache speed: 0.365016
Iter 7/10: ladvise speed: 0.321602
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.363762
Iter 8/10: OSS cache speed: 0.400551
Iter 8/10: ladvise speed: 0.456651
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.363158
Iter 9/10: OSS cache speed: 0.399691
Iter 9/10: ladvise speed: 0.396467
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.375217
Iter 10/10: OSS cache speed: 0.422664
Iter 10/10: ladvise speed: 0.358918
Average uncached read: .32
Average speedup with OSS cached read:  .37 = +15%
Average speedup with ladvise willread:  .35 = +9%
Speedup with OSS cached read less than 20%,  got 15%. Skipping ladvise willread check.
fail_loc=0