== sanity test 255a: check 'lfs ladvise -a willread' ===== 06:01:47 (1789380107)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 21.6272 s, 4.8 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-ffff9673c6791800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.18
Iter 1/10: OSS cache speed: 0.206901
Iter 1/10: ladvise speed: 0.217406
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.16246
Iter 2/10: OSS cache speed: 0.234299
Iter 2/10: ladvise speed: 0.340109
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.244733
Iter 3/10: OSS cache speed: 0.304554
Iter 3/10: ladvise speed: 0.333142
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.288101
Iter 4/10: OSS cache speed: 0.292633
Iter 4/10: ladvise speed: 0.228441
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.246402
Iter 5/10: OSS cache speed: 0.261066
Iter 5/10: ladvise speed: 0.345837
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.278392
Iter 6/10: OSS cache speed: 0.350554
Iter 6/10: ladvise speed: 0.306722
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.294934
Iter 7/10: OSS cache speed: 0.270111
Iter 7/10: ladvise speed: 0.28994
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.284174
Iter 8/10: OSS cache speed: 0.320436
Iter 8/10: ladvise speed: 0.281399
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.394269
Iter 9/10: OSS cache speed: 0.360369
Iter 9/10: ladvise speed: 0.283283
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.320498
Iter 10/10: OSS cache speed: 0.324865
Iter 10/10: ladvise speed: 0.300613
Average uncached read: .26
Average speedup with OSS cached read:  .29 = +11%
Average speedup with ladvise willread:  .29 = +11%
Speedup with OSS cached read less than 20%,  got 11%. Skipping ladvise willread check.
fail_loc=0