== sanity test 255a: check 'lfs ladvise -a willread' ===== 06:00:50 (1773655250)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 13.1987 s, 7.9 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-ffff90d811c26800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.390456
Iter 1/10: OSS cache speed: 0.477117
Iter 1/10: ladvise speed: 0.418281
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.494852
Iter 2/10: OSS cache speed: 0.565899
Iter 2/10: ladvise speed: 0.435431
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.425253
Iter 3/10: OSS cache speed: 0.425056
Iter 3/10: ladvise speed: 0.457436
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.461037
Iter 4/10: OSS cache speed: 0.418814
Iter 4/10: ladvise speed: 0.447887
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.442135
Iter 5/10: OSS cache speed: 0.33948
Iter 5/10: ladvise speed: 0.42829
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.374436
Iter 6/10: OSS cache speed: 0.416634
Iter 6/10: ladvise speed: 0.408655
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.415287
Iter 7/10: OSS cache speed: 0.427526
Iter 7/10: ladvise speed: 0.4319
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.46045
Iter 8/10: OSS cache speed: 0.506467
Iter 8/10: ladvise speed: 0.568217
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.524183
Iter 9/10: OSS cache speed: 0.551599
Iter 9/10: ladvise speed: 0.561743
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.501881
Iter 10/10: OSS cache speed: 0.299608
Iter 10/10: ladvise speed: 0.362612
Average uncached read: .44
Average speedup with OSS cached read:  .44 = +0%
Average speedup with ladvise willread:  .45 = +2%
Speedup with OSS cached read less than 20%,  got 0%. Skipping ladvise willread check.
fail_loc=0