== sanity test 255a: check 'lfs ladvise -a willread' ===== 11:44:32 (1788623072)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 13.411 s, 7.8 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-ffff8d1250a74800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.390984
Iter 1/10: OSS cache speed: 0.474086
Iter 1/10: ladvise speed: 0.439457
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.455629
Iter 2/10: OSS cache speed: 0.465864
Iter 2/10: ladvise speed: 0.451386
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.378741
Iter 3/10: OSS cache speed: 0.42681
Iter 3/10: ladvise speed: 0.424334
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.333344
Iter 4/10: OSS cache speed: 0.369133
Iter 4/10: ladvise speed: 0.463894
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.403678
Iter 5/10: OSS cache speed: 0.457683
Iter 5/10: ladvise speed: 0.462918
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.422304
Iter 6/10: OSS cache speed: 0.441406
Iter 6/10: ladvise speed: 0.418041
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.415908
Iter 7/10: OSS cache speed: 0.476731
Iter 7/10: ladvise speed: 0.488704
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.397383
Iter 8/10: OSS cache speed: 0.435487
Iter 8/10: ladvise speed: 0.464806
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.408291
Iter 9/10: OSS cache speed: 0.437347
Iter 9/10: ladvise speed: 0.441995
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.362833
Iter 10/10: OSS cache speed: 0.484102
Iter 10/10: ladvise speed: 0.41458
Average uncached read: .39
Average speedup with OSS cached read:  .44 = +12%
Average speedup with ladvise willread:  .44 = +12%
Speedup with OSS cached read less than 20%,  got 12%. Skipping ladvise willread check.
fail_loc=0