== sanity test 255a: check 'lfs ladvise -a willread' ===== 09:21:02 (1788528062)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 10.8745 s, 9.6 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-ffff8ff405024000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.356327
Iter 1/10: OSS cache speed: 0.445015
Iter 1/10: ladvise speed: 0.448405
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.407182
Iter 2/10: OSS cache speed: 0.44944
Iter 2/10: ladvise speed: 0.434466
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.431598
Iter 3/10: OSS cache speed: 0.391878
Iter 3/10: ladvise speed: 0.436641
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.407755
Iter 4/10: OSS cache speed: 0.451321
Iter 4/10: ladvise speed: 0.457349
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.46099
Iter 5/10: OSS cache speed: 0.478031
Iter 5/10: ladvise speed: 0.442756
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.420588
Iter 6/10: OSS cache speed: 0.459132
Iter 6/10: ladvise speed: 0.449292
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.368065
Iter 7/10: OSS cache speed: 0.398433
Iter 7/10: ladvise speed: 0.409985
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.378147
Iter 8/10: OSS cache speed: 0.386866
Iter 8/10: ladvise speed: 0.386397
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.381724
Iter 9/10: OSS cache speed: 0.383022
Iter 9/10: ladvise speed: 0.301182
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.41406
Iter 10/10: OSS cache speed: 0.412026
Iter 10/10: ladvise speed: 0.432653
Average uncached read: .40
Average speedup with OSS cached read:  .42 = +5%
Average speedup with ladvise willread:  .41 = +2%
Speedup with OSS cached read less than 20%,  got 5%. Skipping ladvise willread check.
fail_loc=0