== sanity test 255a: check 'lfs ladvise -a willread' ===== 08:40:51 (1790944851)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 13.6553 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-ffff9f0a538b4000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.339562
Iter 1/10: OSS cache speed: 0.357001
Iter 1/10: ladvise speed: 0.315103
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.357665
Iter 2/10: OSS cache speed: 0.353606
Iter 2/10: ladvise speed: 0.350828
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.351672
Iter 3/10: OSS cache speed: 0.322863
Iter 3/10: ladvise speed: 0.287175
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.357898
Iter 4/10: OSS cache speed: 0.35138
Iter 4/10: ladvise speed: 0.304616
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.336382
Iter 5/10: OSS cache speed: 0.299509
Iter 5/10: ladvise speed: 0.320416
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.312434
Iter 6/10: OSS cache speed: 0.33148
Iter 6/10: ladvise speed: 0.349652
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.347376
Iter 7/10: OSS cache speed: 0.331916
Iter 7/10: ladvise speed: 0.274514
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.327375
Iter 8/10: OSS cache speed: 0.306008
Iter 8/10: ladvise speed: 0.349236
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.327988
Iter 9/10: OSS cache speed: 0.321235
Iter 9/10: ladvise speed: 0.356026
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.322122
Iter 10/10: OSS cache speed: 0.316974
Iter 10/10: ladvise speed: 0.351684
Average uncached read: .33
Average speedup with OSS cached read:  .32 = +-3%
Average speedup with ladvise willread:  .32 = +-3%
Speedup with OSS cached read less than 20%,  got -3%. Skipping ladvise willread check.
fail_loc=0