== sanity test 255a: check 'lfs ladvise -a willread' ===== 15:55:42 (1760126142)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 6.90347 s, 15.2 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-ffff89c585470800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.706113
Iter 1/10: OSS cache speed: 0.713396
Iter 1/10: ladvise speed: 0.674361
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.443498
Iter 2/10: OSS cache speed: 0.351034
Iter 2/10: ladvise speed: 0.513055
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.437394
Iter 3/10: OSS cache speed: 0.463451
Iter 3/10: ladvise speed: 0.436492
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.410433
Iter 4/10: OSS cache speed: 0.437704
Iter 4/10: ladvise speed: 0.451594
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.428304
Iter 5/10: OSS cache speed: 0.450456
Iter 5/10: ladvise speed: 0.490451
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.411313
Iter 6/10: OSS cache speed: 0.452406
Iter 6/10: ladvise speed: 0.452385
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.375379
Iter 7/10: OSS cache speed: 0.39178
Iter 7/10: ladvise speed: 0.382124
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.342977
Iter 8/10: OSS cache speed: 0.380536
Iter 8/10: ladvise speed: 0.450788
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.425925
Iter 9/10: OSS cache speed: 0.480673
Iter 9/10: ladvise speed: 0.39495
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.342661
Iter 10/10: OSS cache speed: 0.349287
Iter 10/10: ladvise speed: 0.419151
Average uncached read: .43
Average speedup with OSS cached read:  .44 = +2%
Average speedup with ladvise willread:  .46 = +6%
Speedup with OSS cached read less than 20%,  got 2%. Skipping ladvise willread check.
fail_loc=0