== sanity test 255a: check 'lfs ladvise -a willread' ===== 03:58:44 (1784188724)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 13.1147 s, 8.0 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-ffff9d7a82a3d800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.391303
Iter 1/10: OSS cache speed: 0.46332
Iter 1/10: ladvise speed: 0.400332
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.400071
Iter 2/10: OSS cache speed: 0.532269
Iter 2/10: ladvise speed: 0.386719
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.538038
Iter 3/10: OSS cache speed: 0.466155
Iter 3/10: ladvise speed: 0.484951
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.434326
Iter 4/10: OSS cache speed: 0.498757
Iter 4/10: ladvise speed: 0.48011
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.352472
Iter 5/10: OSS cache speed: 0.453091
Iter 5/10: ladvise speed: 0.44258
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.365482
Iter 6/10: OSS cache speed: 0.422024
Iter 6/10: ladvise speed: 0.444739
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.506594
Iter 7/10: OSS cache speed: 0.461447
Iter 7/10: ladvise speed: 0.475489
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.500083
Iter 8/10: OSS cache speed: 0.502578
Iter 8/10: ladvise speed: 0.467142
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.437948
Iter 9/10: OSS cache speed: 0.517518
Iter 9/10: ladvise speed: 0.437672
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.44834
Iter 10/10: OSS cache speed: 0.465017
Iter 10/10: ladvise speed: 0.521163
Average uncached read: .43
Average speedup with OSS cached read:  .47 = +9%
Average speedup with ladvise willread:  .45 = +4%
Speedup with OSS cached read less than 20%,  got 9%. Skipping ladvise willread check.
fail_loc=0