== sanity test 255a: check 'lfs ladvise -a willread' ===== 17:37:37 (1789076257)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 16.2862 s, 6.4 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-ffff944586b85000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.245461
Iter 1/10: OSS cache speed: 0.277003
Iter 1/10: ladvise speed: 0.335648
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.311147
Iter 2/10: OSS cache speed: 0.363559
Iter 2/10: ladvise speed: 0.33706
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.315057
Iter 3/10: OSS cache speed: 0.315216
Iter 3/10: ladvise speed: 0.307609
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.27117
Iter 4/10: OSS cache speed: 0.342799
Iter 4/10: ladvise speed: 0.258008
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.312982
Iter 5/10: OSS cache speed: 0.343954
Iter 5/10: ladvise speed: 0.251393
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.273558
Iter 6/10: OSS cache speed: 0.301057
Iter 6/10: ladvise speed: 0.305158
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.344959
Iter 7/10: OSS cache speed: 0.340855
Iter 7/10: ladvise speed: 0.287975
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.203474
Iter 8/10: OSS cache speed: 0.257511
Iter 8/10: ladvise speed: 0.346572
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.356878
Iter 9/10: OSS cache speed: 0.354096
Iter 9/10: ladvise speed: 0.327657
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.278814
Iter 10/10: OSS cache speed: 0.38177
Iter 10/10: ladvise speed: 0.382319
Average uncached read: .29
Average speedup with OSS cached read:  .32 = +10%
Average speedup with ladvise willread:  .31 = +6%
Speedup with OSS cached read less than 20%,  got 10%. Skipping ladvise willread check.
fail_loc=0