== sanity test 255a: check 'lfs ladvise -a willread' ===== 09:26:16 (1787837176)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 12.523 s, 8.4 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-ffff8e7291abc000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.363997
Iter 1/10: OSS cache speed: 0.395411
Iter 1/10: ladvise speed: 0.357887
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.380831
Iter 2/10: OSS cache speed: 0.334052
Iter 2/10: ladvise speed: 0.344887
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.349868
Iter 3/10: OSS cache speed: 0.373713
Iter 3/10: ladvise speed: 0.346417
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.351713
Iter 4/10: OSS cache speed: 0.368989
Iter 4/10: ladvise speed: 0.340753
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.365605
Iter 5/10: OSS cache speed: 0.363728
Iter 5/10: ladvise speed: 0.334105
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.391486
Iter 6/10: OSS cache speed: 0.397873
Iter 6/10: ladvise speed: 0.397545
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.386507
Iter 7/10: OSS cache speed: 0.365396
Iter 7/10: ladvise speed: 0.381996
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.32961
Iter 8/10: OSS cache speed: 0.348117
Iter 8/10: ladvise speed: 0.404466
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.402993
Iter 9/10: OSS cache speed: 0.386064
Iter 9/10: ladvise speed: 0.359077
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.381378
Iter 10/10: OSS cache speed: 0.410139
Iter 10/10: ladvise speed: 0.378081
Average uncached read: .37
Average speedup with OSS cached read:  .37 = +0%
Average speedup with ladvise willread:  .36 = +-2%
Speedup with OSS cached read less than 20%,  got 0%. Skipping ladvise willread check.
fail_loc=0