== sanity test 255a: check 'lfs ladvise -a willread' ===== 17:42:13 (1787607733)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 12.703 s, 8.3 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-ffff8fcd58f97800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.364034
Iter 1/10: OSS cache speed: 0.301113
Iter 1/10: ladvise speed: 0.316428
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.30071
Iter 2/10: OSS cache speed: 0.296427
Iter 2/10: ladvise speed: 0.321905
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.294129
Iter 3/10: OSS cache speed: 0.308588
Iter 3/10: ladvise speed: 0.341486
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.335159
Iter 4/10: OSS cache speed: 0.319972
Iter 4/10: ladvise speed: 0.296872
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.295115
Iter 5/10: OSS cache speed: 0.290327
Iter 5/10: ladvise speed: 0.354909
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.324054
Iter 6/10: OSS cache speed: 0.275962
Iter 6/10: ladvise speed: 0.328884
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.334237
Iter 7/10: OSS cache speed: 0.32423
Iter 7/10: ladvise speed: 0.284069
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.319877
Iter 8/10: OSS cache speed: 0.355473
Iter 8/10: ladvise speed: 0.315174
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.342777
Iter 9/10: OSS cache speed: 0.283993
Iter 9/10: ladvise speed: 0.323507
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.34856
Iter 10/10: OSS cache speed: 0.359016
Iter 10/10: ladvise speed: 0.283705
Average uncached read: .32
Average speedup with OSS cached read:  .31 = +-3%
Average speedup with ladvise willread:  .31 = +-3%
Speedup with OSS cached read less than 20%,  got -3%. Skipping ladvise willread check.
fail_loc=0