== sanity test 255a: check 'lfs ladvise -a willread' ===== 00:28:50 (1788928130)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 11.6823 s, 9.0 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-ffff95e145ecb000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.371373
Iter 1/10: OSS cache speed: 0.397283
Iter 1/10: ladvise speed: 0.312892
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.29289
Iter 2/10: OSS cache speed: 0.335229
Iter 2/10: ladvise speed: 0.303507
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.41113
Iter 3/10: OSS cache speed: 0.390743
Iter 3/10: ladvise speed: 0.362018
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.384698
Iter 4/10: OSS cache speed: 0.312393
Iter 4/10: ladvise speed: 0.399149
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.276261
Iter 5/10: OSS cache speed: 0.351096
Iter 5/10: ladvise speed: 0.298846
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.411584
Iter 6/10: OSS cache speed: 0.318835
Iter 6/10: ladvise speed: 0.400495
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.314118
Iter 7/10: OSS cache speed: 0.298464
Iter 7/10: ladvise speed: 0.299292
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.320496
Iter 8/10: OSS cache speed: 0.313077
Iter 8/10: ladvise speed: 0.272017
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.326779
Iter 9/10: OSS cache speed: 0.336307
Iter 9/10: ladvise speed: 0.387489
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.337427
Iter 10/10: OSS cache speed: 0.411856
Iter 10/10: ladvise speed: 0.402797
Average uncached read: .34
Average speedup with OSS cached read:  .34 = +0%
Average speedup with ladvise willread:  .34 = +0%
Speedup with OSS cached read less than 20%,  got 0%. Skipping ladvise willread check.
fail_loc=0