== sanity test 255a: check 'lfs ladvise -a willread' ===== 11:24:56 (1772468696)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 6.39127 s, 16.4 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-ffff8c03485d9000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.745367
Iter 1/10: OSS cache speed: 0.738716
Iter 1/10: ladvise speed: 0.828023
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.812292
Iter 2/10: OSS cache speed: 0.811507
Iter 2/10: ladvise speed: 0.824895
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 1.07075
Iter 3/10: OSS cache speed: 0.95562
Iter 3/10: ladvise speed: 0.632737
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.49075
Iter 4/10: OSS cache speed: 0.530814
Iter 4/10: ladvise speed: 0.236139
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.367115
Iter 5/10: OSS cache speed: 0.36655
Iter 5/10: ladvise speed: 0.427655
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.361271
Iter 6/10: OSS cache speed: 0.315669
Iter 6/10: ladvise speed: 0.371618
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.386395
Iter 7/10: OSS cache speed: 0.421592
Iter 7/10: ladvise speed: 0.378533
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.359497
Iter 8/10: OSS cache speed: 0.352599
Iter 8/10: ladvise speed: 0.435666
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.444594
Iter 9/10: OSS cache speed: 0.533807
Iter 9/10: ladvise speed: 0.349597
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.51211
Iter 10/10: OSS cache speed: 0.457504
Iter 10/10: ladvise speed: 0.418031
Average uncached read: .55
Average speedup with OSS cached read:  .54 = +-1%
Average speedup with ladvise willread:  .49 = +-10%
Speedup with OSS cached read less than 20%,  got -1%. Skipping ladvise willread check.
fail_loc=0