== sanity test 255a: check 'lfs ladvise -a willread' ===== 17:35:41 (1773610541)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 13.6678 s, 7.7 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-ffff937fd073f800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.269395
Iter 1/10: OSS cache speed: 0.336571
Iter 1/10: ladvise speed: 0.326416
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.278851
Iter 2/10: OSS cache speed: 0.297737
Iter 2/10: ladvise speed: 0.290255
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.27946
Iter 3/10: OSS cache speed: 0.285191
Iter 3/10: ladvise speed: 0.288154
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.236613
Iter 4/10: OSS cache speed: 0.313317
Iter 4/10: ladvise speed: 0.242486
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.261651
Iter 5/10: OSS cache speed: 0.296017
Iter 5/10: ladvise speed: 0.276375
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.285951
Iter 6/10: OSS cache speed: 0.273665
Iter 6/10: ladvise speed: 0.267976
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.270453
Iter 7/10: OSS cache speed: 0.320854
Iter 7/10: ladvise speed: 0.263093
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.315135
Iter 8/10: OSS cache speed: 0.286228
Iter 8/10: ladvise speed: 0.315363
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.33672
Iter 9/10: OSS cache speed: 0.309962
Iter 9/10: ladvise speed: 0.332818
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.34533
Iter 10/10: OSS cache speed: 0.34885
Iter 10/10: ladvise speed: 0.341514
Average uncached read: .28
Average speedup with OSS cached read:  .30 = +7%
Average speedup with ladvise willread:  .29 = +3%
Speedup with OSS cached read less than 20%,  got 7%. Skipping ladvise willread check.
fail_loc=0