== sanity test 255a: check 'lfs ladvise -a willread' ===== 09:37:58 (1766414278)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 9.30845 s, 11.3 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-ffff9664490bf800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.521663
Iter 1/10: OSS cache speed: 0.376983
Iter 1/10: ladvise speed: 0.485834
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.451508
Iter 2/10: OSS cache speed: 0.412313
Iter 2/10: ladvise speed: 0.402135
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.470761
Iter 3/10: OSS cache speed: 0.442595
Iter 3/10: ladvise speed: 0.408244
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.463808
Iter 4/10: OSS cache speed: 0.469231
Iter 4/10: ladvise speed: 0.492968
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.519981
Iter 5/10: OSS cache speed: 0.480229
Iter 5/10: ladvise speed: 0.474774
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.552575
Iter 6/10: OSS cache speed: 0.557213
Iter 6/10: ladvise speed: 0.615909
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.550512
Iter 7/10: OSS cache speed: 0.551728
Iter 7/10: ladvise speed: 0.569377
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.579768
Iter 8/10: OSS cache speed: 0.554875
Iter 8/10: ladvise speed: 0.629461
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.633743
Iter 9/10: OSS cache speed: 0.742841
Iter 9/10: ladvise speed: 0.664376
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.725893
Iter 10/10: OSS cache speed: 0.654658
Iter 10/10: ladvise speed: 0.684936
Average uncached read: .54
Average speedup with OSS cached read:  .52 = +-3%
Average speedup with ladvise willread:  .54 = +0%
Speedup with OSS cached read less than 20%,  got -3%. Skipping ladvise willread check.
fail_loc=0