== sanity test 255a: check 'lfs ladvise -a willread' ===== 05:12:21 (1789290741)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 12.9179 s, 8.1 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-ffff98afc560f000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.435414
Iter 1/10: OSS cache speed: 0.496939
Iter 1/10: ladvise speed: 0.42181
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.427626
Iter 2/10: OSS cache speed: 0.470169
Iter 2/10: ladvise speed: 0.444039
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.438413
Iter 3/10: OSS cache speed: 0.412748
Iter 3/10: ladvise speed: 0.390175
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.300677
Iter 4/10: OSS cache speed: 0.309349
Iter 4/10: ladvise speed: 0.381101
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.29192
Iter 5/10: OSS cache speed: 0.343884
Iter 5/10: ladvise speed: 0.389392
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.36464
Iter 6/10: OSS cache speed: 0.347663
Iter 6/10: ladvise speed: 0.345156
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.347616
Iter 7/10: OSS cache speed: 0.353734
Iter 7/10: ladvise speed: 0.377018
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.392065
Iter 8/10: OSS cache speed: 0.486507
Iter 8/10: ladvise speed: 0.489936
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.380952
Iter 9/10: OSS cache speed: 0.412724
Iter 9/10: ladvise speed: 0.437493
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.447205
Iter 10/10: OSS cache speed: 0.480754
Iter 10/10: ladvise speed: 0.442685
Average uncached read: .38
Average speedup with OSS cached read:  .41 = +7%
Average speedup with ladvise willread:  .41 = +7%
Speedup with OSS cached read less than 20%,  got 7%. Skipping ladvise willread check.
fail_loc=0