== sanity test 255a: check 'lfs ladvise -a willread' ===== 18:48:23 (1784587703)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 15.8772 s, 6.6 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-ffff941c05012000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.362546
Iter 1/10: OSS cache speed: 0.346626
Iter 1/10: ladvise speed: 0.40956
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.315845
Iter 2/10: OSS cache speed: 0.327551
Iter 2/10: ladvise speed: 0.320253
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.255673
Iter 3/10: OSS cache speed: 0.360652
Iter 3/10: ladvise speed: 0.27406
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.255796
Iter 4/10: OSS cache speed: 0.303315
Iter 4/10: ladvise speed: 0.322836
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.323326
Iter 5/10: OSS cache speed: 0.340948
Iter 5/10: ladvise speed: 0.392121
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.314803
Iter 6/10: OSS cache speed: 0.354097
Iter 6/10: ladvise speed: 0.331766
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.331169
Iter 7/10: OSS cache speed: 0.334121
Iter 7/10: ladvise speed: 0.344059
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.281318
Iter 8/10: OSS cache speed: 0.338609
Iter 8/10: ladvise speed: 0.360391
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.310755
Iter 9/10: OSS cache speed: 0.353655
Iter 9/10: ladvise speed: 0.302411
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.305879
Iter 10/10: OSS cache speed: 0.383019
Iter 10/10: ladvise speed: 0.335424
Average uncached read: .30
Average speedup with OSS cached read:  .34 = +13%
Average speedup with ladvise willread:  .33 = +10%
Speedup with OSS cached read less than 20%,  got 13%. Skipping ladvise willread check.
fail_loc=0