== sanity test 255a: check 'lfs ladvise -a willread' ===== 09:22:04 (1783948924)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 12.6723 s, 8.3 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-ffff9e4a90beb000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.427234
Iter 1/10: OSS cache speed: 0.492942
Iter 1/10: ladvise speed: 0.395977
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.405338
Iter 2/10: OSS cache speed: 0.359332
Iter 2/10: ladvise speed: 0.446807
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.339833
Iter 3/10: OSS cache speed: 0.402202
Iter 3/10: ladvise speed: 0.389848
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.358027
Iter 4/10: OSS cache speed: 0.44386
Iter 4/10: ladvise speed: 0.407364
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.390785
Iter 5/10: OSS cache speed: 0.39417
Iter 5/10: ladvise speed: 0.43102
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.381114
Iter 6/10: OSS cache speed: 0.410955
Iter 6/10: ladvise speed: 0.411048
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.374986
Iter 7/10: OSS cache speed: 0.485651
Iter 7/10: ladvise speed: 0.439159
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.457323
Iter 8/10: OSS cache speed: 0.491035
Iter 8/10: ladvise speed: 0.474457
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.394881
Iter 9/10: OSS cache speed: 0.432776
Iter 9/10: ladvise speed: 0.434522
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.346261
Iter 10/10: OSS cache speed: 0.404335
Iter 10/10: ladvise speed: 0.397839
Average uncached read: .38
Average speedup with OSS cached read:  .43 = +13%
Average speedup with ladvise willread:  .42 = +10%
Speedup with OSS cached read less than 20%,  got 13%. Skipping ladvise willread check.
fail_loc=0