== sanity test 255a: check 'lfs ladvise -a willread' ===== 12:07:53 (1789056473)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 12.8324 s, 8.2 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-ffff96b585703000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.337103
Iter 1/10: OSS cache speed: 0.331911
Iter 1/10: ladvise speed: 0.394849
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.352147
Iter 2/10: OSS cache speed: 0.48793
Iter 2/10: ladvise speed: 0.473216
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.31242
Iter 3/10: OSS cache speed: 0.497739
Iter 3/10: ladvise speed: 0.301412
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.413393
Iter 4/10: OSS cache speed: 0.418777
Iter 4/10: ladvise speed: 0.395244
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.403001
Iter 5/10: OSS cache speed: 0.42334
Iter 5/10: ladvise speed: 0.409626
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.312969
Iter 6/10: OSS cache speed: 0.399602
Iter 6/10: ladvise speed: 0.488348
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.438238
Iter 7/10: OSS cache speed: 0.397528
Iter 7/10: ladvise speed: 0.367006
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.355211
Iter 8/10: OSS cache speed: 0.463905
Iter 8/10: ladvise speed: 0.342624
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.417876
Iter 9/10: OSS cache speed: 0.404214
Iter 9/10: ladvise speed: 0.462572
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.443347
Iter 10/10: OSS cache speed: 0.301717
Iter 10/10: ladvise speed: 0.396145
Average uncached read: .37
Average speedup with OSS cached read:  .41 = +10%
Average speedup with ladvise willread:  .40 = +8%
Speedup with OSS cached read less than 20%,  got 10%. Skipping ladvise willread check.
fail_loc=0