== sanity test 255a: check 'lfs ladvise -a willread' ===== 07:59:54 (1789127994)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 13.685 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-ffff8d830b8de000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.330588
Iter 1/10: OSS cache speed: 0.32841
Iter 1/10: ladvise speed: 0.30943
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.32009
Iter 2/10: OSS cache speed: 0.346511
Iter 2/10: ladvise speed: 0.332763
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.35586
Iter 3/10: OSS cache speed: 0.340326
Iter 3/10: ladvise speed: 0.324277
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.356105
Iter 4/10: OSS cache speed: 0.374748
Iter 4/10: ladvise speed: 0.292503
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.371927
Iter 5/10: OSS cache speed: 0.351754
Iter 5/10: ladvise speed: 0.34043
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.337959
Iter 6/10: OSS cache speed: 0.308755
Iter 6/10: ladvise speed: 0.347627
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.331426
Iter 7/10: OSS cache speed: 0.351531
Iter 7/10: ladvise speed: 0.300708
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.338461
Iter 8/10: OSS cache speed: 0.328195
Iter 8/10: ladvise speed: 0.290259
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.280818
Iter 9/10: OSS cache speed: 0.279313
Iter 9/10: ladvise speed: 0.299826
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.289514
Iter 10/10: OSS cache speed: 0.29323
Iter 10/10: ladvise speed: 0.257295
Average uncached read: .33
Average speedup with OSS cached read:  .33 = +0%
Average speedup with ladvise willread:  .30 = +-9%
Speedup with OSS cached read less than 20%,  got 0%. Skipping ladvise willread check.
fail_loc=0