== sanity test 255a: check 'lfs ladvise -a willread' ===== 23:41:58 (1773200518)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 21.1001 s, 5.0 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-ffff97a21295b000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.240785
Iter 1/10: OSS cache speed: 0.258891
Iter 1/10: ladvise speed: 0.292339
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.238756
Iter 2/10: OSS cache speed: 0.251497
Iter 2/10: ladvise speed: 0.31539
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.242999
Iter 3/10: OSS cache speed: 0.265609
Iter 3/10: ladvise speed: 0.302891
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.247822
Iter 4/10: OSS cache speed: 0.296742
Iter 4/10: ladvise speed: 0.238694
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.25099
Iter 5/10: OSS cache speed: 0.266419
Iter 5/10: ladvise speed: 0.285294
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.25224
Iter 6/10: OSS cache speed: 0.288981
Iter 6/10: ladvise speed: 0.338492
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.267273
Iter 7/10: OSS cache speed: 0.281142
Iter 7/10: ladvise speed: 0.277339
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.25059
Iter 8/10: OSS cache speed: 0.289278
Iter 8/10: ladvise speed: 0.280884
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.280417
Iter 9/10: OSS cache speed: 0.278103
Iter 9/10: ladvise speed: 0.312519
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.231323
Iter 10/10: OSS cache speed: 0.249494
Iter 10/10: ladvise speed: 0.301496
Average uncached read: .25
Average speedup with OSS cached read:  .27 = +8%
Average speedup with ladvise willread:  .29 = +16%
Speedup with OSS cached read less than 20%,  got 8%. Skipping ladvise willread check.
fail_loc=0