== sanity test 255a: check 'lfs ladvise -a willread' ===== 03:20:42 (1785396042)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 13.5458 s, 7.7 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-ffff97f812853000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.236768
Iter 1/10: OSS cache speed: 0.238748
Iter 1/10: ladvise speed: 0.239602
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.196303
Iter 2/10: OSS cache speed: 0.237016
Iter 2/10: ladvise speed: 0.240761
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.219563
Iter 3/10: OSS cache speed: 0.270984
Iter 3/10: ladvise speed: 0.284144
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.239575
Iter 4/10: OSS cache speed: 0.230238
Iter 4/10: ladvise speed: 0.257143
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.222092
Iter 5/10: OSS cache speed: 0.250248
Iter 5/10: ladvise speed: 0.239752
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.273564
Iter 6/10: OSS cache speed: 0.219784
Iter 6/10: ladvise speed: 0.280405
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.235344
Iter 7/10: OSS cache speed: 0.250053
Iter 7/10: ladvise speed: 0.225715
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.252122
Iter 8/10: OSS cache speed: 0.232197
Iter 8/10: ladvise speed: 0.262482
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.294147
Iter 9/10: OSS cache speed: 0.268268
Iter 9/10: ladvise speed: 0.224224
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.269386
Iter 10/10: OSS cache speed: 0.220005
Iter 10/10: ladvise speed: 0.225669
Average uncached read: .24
Average speedup with OSS cached read:  .24 = +0%
Average speedup with ladvise willread:  .24 = +0%
Speedup with OSS cached read less than 20%,  got 0%. Skipping ladvise willread check.
fail_loc=0