== sanity test 255a: check 'lfs ladvise -a willread' ===== 19:24:33 (1763339073)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 8.6303 s, 12.1 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-ffff9eb887e32800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.437528
Iter 1/10: OSS cache speed: 0.357887
Iter 1/10: ladvise speed: 0.449836
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.421733
Iter 2/10: OSS cache speed: 0.458045
Iter 2/10: ladvise speed: 0.452515
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.40152
Iter 3/10: OSS cache speed: 0.443375
Iter 3/10: ladvise speed: 0.46354
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.374524
Iter 4/10: OSS cache speed: 0.460167
Iter 4/10: ladvise speed: 0.421843
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.406208
Iter 5/10: OSS cache speed: 0.478088
Iter 5/10: ladvise speed: 0.381114
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.419823
Iter 6/10: OSS cache speed: 0.399639
Iter 6/10: ladvise speed: 0.486879
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.4058
Iter 7/10: OSS cache speed: 0.421241
Iter 7/10: ladvise speed: 0.42915
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.380589
Iter 8/10: OSS cache speed: 0.453743
Iter 8/10: ladvise speed: 0.401865
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.365761
Iter 9/10: OSS cache speed: 0.401169
Iter 9/10: ladvise speed: 0.413284
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.370515
Iter 10/10: OSS cache speed: 0.438384
Iter 10/10: ladvise speed: 0.422755
Average uncached read: .39
Average speedup with OSS cached read:  .43 = +10%
Average speedup with ladvise willread:  .43 = +10%
Speedup with OSS cached read less than 20%,  got 10%. Skipping ladvise willread check.
fail_loc=0