== sanity test 255a: check 'lfs ladvise -a willread' ===== 21:27:03 (1746149223)
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 5.04635 s, 20.8 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-ffff88012a4ff800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.464113
Iter 1/10: OSS cache speed: 0.433361
Iter 1/10: ladvise speed: 0.423601
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.452031
Iter 2/10: OSS cache speed: 0.464637
Iter 2/10: ladvise speed: 0.451015
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.429704
Iter 3/10: OSS cache speed: 0.432467
Iter 3/10: ladvise speed: 0.41957
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.423301
Iter 4/10: OSS cache speed: 0.396397
Iter 4/10: ladvise speed: 0.396628
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.436497
Iter 5/10: OSS cache speed: 0.437648
Iter 5/10: ladvise speed: 0.419995
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.423515
Iter 6/10: OSS cache speed: 0.456304
Iter 6/10: ladvise speed: 0.439863
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.506488
Iter 7/10: OSS cache speed: 0.497238
Iter 7/10: ladvise speed: 0.469525
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.489726
Iter 8/10: OSS cache speed: 0.524552
Iter 8/10: ladvise speed: 0.505325
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.517045
Iter 9/10: OSS cache speed: 0.48818
Iter 9/10: ladvise speed: 0.470707
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.440293
Iter 10/10: OSS cache speed: 0.448338
Iter 10/10: ladvise speed: 0.48766
Average uncached read: .45
Average speedup with OSS cached read:  .45 = +0%
Average speedup with ladvise willread:  .44 = +-2%
Speedup with OSS cached read less than 20%,  got 0%. Skipping ladvise willread check.
fail_loc=0