== sanity test 255a: check 'lfs ladvise -a willread' ===== 03:29:01 (1787383741)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 19.7165 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-ffff8c1048b91000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.425547
Iter 1/10: OSS cache speed: 0.323235
Iter 1/10: ladvise speed: 0.40555
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.430064
Iter 2/10: OSS cache speed: 0.445745
Iter 2/10: ladvise speed: 0.380815
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.335134
Iter 3/10: OSS cache speed: 0.395424
Iter 3/10: ladvise speed: 0.435742
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.377308
Iter 4/10: OSS cache speed: 0.307533
Iter 4/10: ladvise speed: 0.392845
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.355121
Iter 5/10: OSS cache speed: 0.435991
Iter 5/10: ladvise speed: 0.384288
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.327841
Iter 6/10: OSS cache speed: 0.390406
Iter 6/10: ladvise speed: 0.422275
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.343332
Iter 7/10: OSS cache speed: 0.384205
Iter 7/10: ladvise speed: 0.381862
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.379134
Iter 8/10: OSS cache speed: 0.402634
Iter 8/10: ladvise speed: 0.429123
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.344157
Iter 9/10: OSS cache speed: 0.390847
Iter 9/10: ladvise speed: 0.357576
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.346053
Iter 10/10: OSS cache speed: 0.416188
Iter 10/10: ladvise speed: 0.322046
Average uncached read: .36
Average speedup with OSS cached read:  .38 = +5%
Average speedup with ladvise willread:  .39 = +8%
Speedup with OSS cached read less than 20%,  got 5%. Skipping ladvise willread check.
fail_loc=0