== sanity test 255a: check 'lfs ladvise -a willread' ===== 18:07:36 (1785881256)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 18.0002 s, 5.8 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-ffff8acac4e8f800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.256111
Iter 1/10: OSS cache speed: 0.313326
Iter 1/10: ladvise speed: 0.270085
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.214351
Iter 2/10: OSS cache speed: 0.279408
Iter 2/10: ladvise speed: 0.282499
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.305274
Iter 3/10: OSS cache speed: 0.283921
Iter 3/10: ladvise speed: 0.250206
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.252796
Iter 4/10: OSS cache speed: 0.267356
Iter 4/10: ladvise speed: 0.325908
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.250816
Iter 5/10: OSS cache speed: 0.280544
Iter 5/10: ladvise speed: 0.249169
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.210188
Iter 6/10: OSS cache speed: 0.238114
Iter 6/10: ladvise speed: 0.315756
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.248737
Iter 7/10: OSS cache speed: 0.246214
Iter 7/10: ladvise speed: 0.290723
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.284798
Iter 8/10: OSS cache speed: 0.259027
Iter 8/10: ladvise speed: 0.228626
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.232594
Iter 9/10: OSS cache speed: 0.247385
Iter 9/10: ladvise speed: 0.211605
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.257385
Iter 10/10: OSS cache speed: 0.279307
Iter 10/10: ladvise speed: 0.266611
Average uncached read: .25
Average speedup with OSS cached read:  .26 = +4%
Average speedup with ladvise willread:  .26 = +4%
Speedup with OSS cached read less than 20%,  got 4%. Skipping ladvise willread check.
fail_loc=0