== sanity test 255a: check 'lfs ladvise -a willread' ===== 22:47:41 (1784342861)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 5.28203 s, 19.9 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-ffff9a07e2191800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 2.26143
Iter 1/10: OSS cache speed: 2.02019
Iter 1/10: ladvise speed: 2.05411
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 2.03186
Iter 2/10: OSS cache speed: 2.03371
Iter 2/10: ladvise speed: 2.03388
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 2.10072
Iter 3/10: OSS cache speed: 2.11934
Iter 3/10: ladvise speed: 2.08855
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 1.81803
Iter 4/10: OSS cache speed: 1.08021
Iter 4/10: ladvise speed: 1.29455
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 1.2188
Iter 5/10: OSS cache speed: 1.07131
Iter 5/10: ladvise speed: 1.02238
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.963433
Iter 6/10: OSS cache speed: 0.884889
Iter 6/10: ladvise speed: 1.0668
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 1.03012
Iter 7/10: OSS cache speed: 1.14453
Iter 7/10: ladvise speed: 0.993315
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 1.32886
Iter 8/10: OSS cache speed: 0.529171
Iter 8/10: ladvise speed: 0.583432
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.671871
Iter 9/10: OSS cache speed: 0.614704
Iter 9/10: ladvise speed: 0.787697
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.779702
Iter 10/10: OSS cache speed: 0.726075
Iter 10/10: ladvise speed: 1.08679
Average uncached read: 1.42
Average speedup with OSS cached read:  1.22 = +-14%
Average speedup with ladvise willread:  1.30 = +-8%
Speedup with OSS cached read less than 20%,  got -14%. Skipping ladvise willread check.
fail_loc=0