== sanity test 255a: check 'lfs ladvise -a willread' ===== 15:16:05 (1786821365)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 14.4164 s, 7.3 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-ffff9c4ac71ab000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.423422
Iter 1/10: OSS cache speed: 0.434185
Iter 1/10: ladvise speed: 0.495921
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.440245
Iter 2/10: OSS cache speed: 0.476634
Iter 2/10: ladvise speed: 0.409498
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.418223
Iter 3/10: OSS cache speed: 0.467575
Iter 3/10: ladvise speed: 0.422051
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.450584
Iter 4/10: OSS cache speed: 0.476129
Iter 4/10: ladvise speed: 0.488913
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.364278
Iter 5/10: OSS cache speed: 0.425471
Iter 5/10: ladvise speed: 0.399327
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.436944
Iter 6/10: OSS cache speed: 0.425675
Iter 6/10: ladvise speed: 0.511588
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.337693
Iter 7/10: OSS cache speed: 0.393645
Iter 7/10: ladvise speed: 0.410889
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.373741
Iter 8/10: OSS cache speed: 0.3958
Iter 8/10: ladvise speed: 0.404609
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.405506
Iter 9/10: OSS cache speed: 0.483334
Iter 9/10: ladvise speed: 0.400953
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.391092
Iter 10/10: OSS cache speed: 0.391513
Iter 10/10: ladvise speed: 0.45712
Average uncached read: .40
Average speedup with OSS cached read:  .43 = +7%
Average speedup with ladvise willread:  .44 = +10%
Speedup with OSS cached read less than 20%,  got 7%. Skipping ladvise willread check.
fail_loc=0