== sanity test 255a: check 'lfs ladvise -a willread' ===== 02:51:51 (1788591111)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 14.7264 s, 7.1 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-ffff922c8661e800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.383379
Iter 1/10: OSS cache speed: 0.344311
Iter 1/10: ladvise speed: 0.375901
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.33733
Iter 2/10: OSS cache speed: 0.340573
Iter 2/10: ladvise speed: 0.373975
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.388184
Iter 3/10: OSS cache speed: 0.329783
Iter 3/10: ladvise speed: 0.343351
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.321684
Iter 4/10: OSS cache speed: 0.355337
Iter 4/10: ladvise speed: 0.338752
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.288326
Iter 5/10: OSS cache speed: 0.358264
Iter 5/10: ladvise speed: 0.412117
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.380295
Iter 6/10: OSS cache speed: 0.345723
Iter 6/10: ladvise speed: 0.356339
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.427799
Iter 7/10: OSS cache speed: 0.424631
Iter 7/10: ladvise speed: 0.393221
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.387587
Iter 8/10: OSS cache speed: 0.361894
Iter 8/10: ladvise speed: 0.42967
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.383631
Iter 9/10: OSS cache speed: 0.393795
Iter 9/10: ladvise speed: 0.384873
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.443232
Iter 10/10: OSS cache speed: 0.365574
Iter 10/10: ladvise speed: 0.403015
Average uncached read: .37
Average speedup with OSS cached read:  .36 = +-2%
Average speedup with ladvise willread:  .38 = +2%
Speedup with OSS cached read less than 20%,  got -2%. Skipping ladvise willread check.
fail_loc=0