== sanity test 255a: check 'lfs ladvise -a willread' ===== 23:08:06 (1787368086)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 10.5089 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-ffff9528872ac800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.434187
Iter 1/10: OSS cache speed: 0.417622
Iter 1/10: ladvise speed: 0.427239
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.444536
Iter 2/10: OSS cache speed: 0.42973
Iter 2/10: ladvise speed: 0.414166
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.474109
Iter 3/10: OSS cache speed: 0.409982
Iter 3/10: ladvise speed: 0.36996
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.418925
Iter 4/10: OSS cache speed: 0.373391
Iter 4/10: ladvise speed: 0.405313
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.396531
Iter 5/10: OSS cache speed: 0.400314
Iter 5/10: ladvise speed: 0.390654
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.425857
Iter 6/10: OSS cache speed: 0.442403
Iter 6/10: ladvise speed: 0.426804
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.427638
Iter 7/10: OSS cache speed: 0.430616
Iter 7/10: ladvise speed: 0.409765
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.432247
Iter 8/10: OSS cache speed: 0.417126
Iter 8/10: ladvise speed: 0.443301
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.418293
Iter 9/10: OSS cache speed: 0.445099
Iter 9/10: ladvise speed: 0.427284
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.320604
Iter 10/10: OSS cache speed: 0.44725
Iter 10/10: ladvise speed: 0.45491
Average uncached read: .41
Average speedup with OSS cached read:  .42 = +2%
Average speedup with ladvise willread:  .41 = +0%
Speedup with OSS cached read less than 20%,  got 2%. Skipping ladvise willread check.
fail_loc=0