== sanity test 255a: check 'lfs ladvise -a willread' ===== 07:58:45 (1785758325)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 19.7729 s, 5.3 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-ffff954c901b6800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.222441
Iter 1/10: OSS cache speed: 0.215376
Iter 1/10: ladvise speed: 0.246409
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.193742
Iter 2/10: OSS cache speed: 0.199574
Iter 2/10: ladvise speed: 0.262832
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.246616
Iter 3/10: OSS cache speed: 0.228203
Iter 3/10: ladvise speed: 0.233386
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.230964
Iter 4/10: OSS cache speed: 0.249661
Iter 4/10: ladvise speed: 0.243274
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.206105
Iter 5/10: OSS cache speed: 0.233438
Iter 5/10: ladvise speed: 0.233166
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.220946
Iter 6/10: OSS cache speed: 0.219012
Iter 6/10: ladvise speed: 0.262535
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.21521
Iter 7/10: OSS cache speed: 0.238097
Iter 7/10: ladvise speed: 0.212665
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.189014
Iter 8/10: OSS cache speed: 0.210725
Iter 8/10: ladvise speed: 0.215793
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.236117
Iter 9/10: OSS cache speed: 0.221449
Iter 9/10: ladvise speed: 0.193727
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.258604
Iter 10/10: OSS cache speed: 0.235056
Iter 10/10: ladvise speed: 0.215581
Average uncached read: .22
Average speedup with OSS cached read:  .22 = +0%
Average speedup with ladvise willread:  .23 = +4%
Speedup with OSS cached read less than 20%,  got 0%. Skipping ladvise willread check.
fail_loc=0