== sanity test 255a: check 'lfs ladvise -a willread' ===== 23:39:09 (1788838749)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 10.4522 s, 10.0 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-ffff935a50e7f000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.473175
Iter 1/10: OSS cache speed: 0.471855
Iter 1/10: ladvise speed: 0.498698
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.508499
Iter 2/10: OSS cache speed: 0.49896
Iter 2/10: ladvise speed: 0.462412
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.455719
Iter 3/10: OSS cache speed: 0.453541
Iter 3/10: ladvise speed: 0.492918
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.457831
Iter 4/10: OSS cache speed: 0.500426
Iter 4/10: ladvise speed: 0.466278
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.484348
Iter 5/10: OSS cache speed: 0.473948
Iter 5/10: ladvise speed: 0.518088
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.489489
Iter 6/10: OSS cache speed: 0.535658
Iter 6/10: ladvise speed: 0.491367
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.490808
Iter 7/10: OSS cache speed: 0.447644
Iter 7/10: ladvise speed: 0.500121
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.451817
Iter 8/10: OSS cache speed: 0.484483
Iter 8/10: ladvise speed: 0.476478
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.48314
Iter 9/10: OSS cache speed: 0.462042
Iter 9/10: ladvise speed: 0.404726
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.497844
Iter 10/10: OSS cache speed: 0.504803
Iter 10/10: ladvise speed: 0.503459
Average uncached read: .47
Average speedup with OSS cached read:  .48 = +2%
Average speedup with ladvise willread:  .48 = +2%
Speedup with OSS cached read less than 20%,  got 2%. Skipping ladvise willread check.
fail_loc=0