== sanity test 255a: check 'lfs ladvise -a willread' ===== 04:51:42 (1788511902)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 14.8749 s, 7.0 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-ffffa055d10f3800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.254294
Iter 1/10: OSS cache speed: 0.310224
Iter 1/10: ladvise speed: 0.301681
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.269607
Iter 2/10: OSS cache speed: 0.27096
Iter 2/10: ladvise speed: 0.288201
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.270225
Iter 3/10: OSS cache speed: 0.263493
Iter 3/10: ladvise speed: 0.277982
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.264319
Iter 4/10: OSS cache speed: 0.254422
Iter 4/10: ladvise speed: 0.25276
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.269651
Iter 5/10: OSS cache speed: 0.26737
Iter 5/10: ladvise speed: 0.296085
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.232718
Iter 6/10: OSS cache speed: 0.260431
Iter 6/10: ladvise speed: 0.231963
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.251422
Iter 7/10: OSS cache speed: 0.324085
Iter 7/10: ladvise speed: 0.252737
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.288671
Iter 8/10: OSS cache speed: 0.310424
Iter 8/10: ladvise speed: 0.280472
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.319686
Iter 9/10: OSS cache speed: 0.326969
Iter 9/10: ladvise speed: 0.260368
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.282674
Iter 10/10: OSS cache speed: 0.286718
Iter 10/10: ladvise speed: 0.329689
Average uncached read: .27
Average speedup with OSS cached read:  .28 = +3%
Average speedup with ladvise willread:  .27 = +0%
Speedup with OSS cached read less than 20%,  got 3%. Skipping ladvise willread check.
fail_loc=0