== sanity test 255a: check 'lfs ladvise -a willread' ===== 23:49:43 (1783136983)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 13.7253 s, 7.6 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-ffff8b3bc9f3f000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.355832
Iter 1/10: OSS cache speed: 0.39276
Iter 1/10: ladvise speed: 0.379436
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.349972
Iter 2/10: OSS cache speed: 0.468222
Iter 2/10: ladvise speed: 0.387447
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.377487
Iter 3/10: OSS cache speed: 0.375197
Iter 3/10: ladvise speed: 0.426496
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.384134
Iter 4/10: OSS cache speed: 0.399873
Iter 4/10: ladvise speed: 0.352477
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.415321
Iter 5/10: OSS cache speed: 0.38476
Iter 5/10: ladvise speed: 0.382498
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.307952
Iter 6/10: OSS cache speed: 0.430722
Iter 6/10: ladvise speed: 0.432511
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.344317
Iter 7/10: OSS cache speed: 0.34443
Iter 7/10: ladvise speed: 0.390424
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.328485
Iter 8/10: OSS cache speed: 0.376443
Iter 8/10: ladvise speed: 0.386846
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.385508
Iter 9/10: OSS cache speed: 0.405993
Iter 9/10: ladvise speed: 0.514302
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.423358
Iter 10/10: OSS cache speed: 0.515251
Iter 10/10: ladvise speed: 0.46188
Average uncached read: .36
Average speedup with OSS cached read:  .40 = +11%
Average speedup with ladvise willread:  .41 = +13%
Speedup with OSS cached read less than 20%,  got 11%. Skipping ladvise willread check.
fail_loc=0