== sanity test 255a: check 'lfs ladvise -a willread' ===== 22:08:03 (1781230083)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 13.6998 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-ffff8ae147ddc000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.287336
Iter 1/10: OSS cache speed: 0.248531
Iter 1/10: ladvise speed: 0.30833
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.28031
Iter 2/10: OSS cache speed: 0.272606
Iter 2/10: ladvise speed: 0.291533
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.291919
Iter 3/10: OSS cache speed: 0.285982
Iter 3/10: ladvise speed: 0.271052
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.318139
Iter 4/10: OSS cache speed: 0.327338
Iter 4/10: ladvise speed: 0.311504
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.319835
Iter 5/10: OSS cache speed: 0.301987
Iter 5/10: ladvise speed: 0.292169
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.308891
Iter 6/10: OSS cache speed: 0.280608
Iter 6/10: ladvise speed: 0.293718
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.295032
Iter 7/10: OSS cache speed: 0.259393
Iter 7/10: ladvise speed: 0.290096
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.284652
Iter 8/10: OSS cache speed: 0.297142
Iter 8/10: ladvise speed: 0.304572
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.305358
Iter 9/10: OSS cache speed: 0.267007
Iter 9/10: ladvise speed: 0.294199
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.307385
Iter 10/10: OSS cache speed: 0.299342
Iter 10/10: ladvise speed: 0.296619
Average uncached read: .29
Average speedup with OSS cached read:  .28 = +-3%
Average speedup with ladvise willread:  .29 = +0%
Speedup with OSS cached read less than 20%,  got -3%. Skipping ladvise willread check.
fail_loc=0