== sanity test 255a: check 'lfs ladvise -a willread' ===== 22:43:08 (1789267388)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 15.2973 s, 6.9 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-ffff94fad92d2000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.538084
Iter 1/10: OSS cache speed: 0.473341
Iter 1/10: ladvise speed: 0.419292
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.408309
Iter 2/10: OSS cache speed: 0.442236
Iter 2/10: ladvise speed: 0.44111
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.440893
Iter 3/10: OSS cache speed: 0.507016
Iter 3/10: ladvise speed: 0.449315
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.43147
Iter 4/10: OSS cache speed: 0.523099
Iter 4/10: ladvise speed: 0.497096
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.370563
Iter 5/10: OSS cache speed: 0.469101
Iter 5/10: ladvise speed: 0.413581
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.45485
Iter 6/10: OSS cache speed: 0.397666
Iter 6/10: ladvise speed: 0.47838
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.403756
Iter 7/10: OSS cache speed: 0.283638
Iter 7/10: ladvise speed: 0.40215
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.416639
Iter 8/10: OSS cache speed: 0.461662
Iter 8/10: ladvise speed: 0.492482
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.389927
Iter 9/10: OSS cache speed: 0.579628
Iter 9/10: ladvise speed: 0.531873
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.487916
Iter 10/10: OSS cache speed: 0.63491
Iter 10/10: ladvise speed: 0.537488
Average uncached read: .43
Average speedup with OSS cached read:  .47 = +9%
Average speedup with ladvise willread:  .46 = +6%
Speedup with OSS cached read less than 20%,  got 9%. Skipping ladvise willread check.
fail_loc=0