== sanity test 255a: check 'lfs ladvise -a willread' ===== 23:23:05 (1763353385)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 6.71053 s, 15.6 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-ffff9073493bf800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.775831
Iter 1/10: OSS cache speed: 0.836406
Iter 1/10: ladvise speed: 0.97075
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.787404
Iter 2/10: OSS cache speed: 0.854821
Iter 2/10: ladvise speed: 0.886999
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.881494
Iter 3/10: OSS cache speed: 0.951916
Iter 3/10: ladvise speed: 1.18698
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.966843
Iter 4/10: OSS cache speed: 1.04443
Iter 4/10: ladvise speed: 1.07154
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.882117
Iter 5/10: OSS cache speed: 0.854557
Iter 5/10: ladvise speed: 1.26061
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.986439
Iter 6/10: OSS cache speed: 1.08208
Iter 6/10: ladvise speed: 0.94324
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 1.01635
Iter 7/10: OSS cache speed: 1.08512
Iter 7/10: ladvise speed: 1.70899
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 1.2842
Iter 8/10: OSS cache speed: 1.51325
Iter 8/10: ladvise speed: 1.35971
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 1.31909
Iter 9/10: OSS cache speed: 1.88693
Iter 9/10: ladvise speed: 2.20643
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 1.86473
Iter 10/10: OSS cache speed: 2.2776
Iter 10/10: ladvise speed: 2.46663
Average uncached read: 1.07
Average speedup with OSS cached read:  1.23 = +14%
Average speedup with ladvise willread:  1.40 = +30%
Speedup with OSS cached read less than 20%,  got 14%. Skipping ladvise willread check.
fail_loc=0