== sanity test 255a: check 'lfs ladvise -a willread' ===== 21:29:01 (1788830941)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 10.7627 s, 9.7 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-ffff8dc297a71000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.48756
Iter 1/10: OSS cache speed: 0.428648
Iter 1/10: ladvise speed: 0.486237
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.393269
Iter 2/10: OSS cache speed: 0.448213
Iter 2/10: ladvise speed: 0.493942
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.420455
Iter 3/10: OSS cache speed: 0.460724
Iter 3/10: ladvise speed: 0.4779
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.374041
Iter 4/10: OSS cache speed: 0.494246
Iter 4/10: ladvise speed: 0.490221
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.437928
Iter 5/10: OSS cache speed: 0.435037
Iter 5/10: ladvise speed: 0.421721
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.444448
Iter 6/10: OSS cache speed: 0.471531
Iter 6/10: ladvise speed: 0.506339
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.437278
Iter 7/10: OSS cache speed: 0.407705
Iter 7/10: ladvise speed: 0.487918
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.403457
Iter 8/10: OSS cache speed: 0.445215
Iter 8/10: ladvise speed: 0.409961
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.387357
Iter 9/10: OSS cache speed: 0.421492
Iter 9/10: ladvise speed: 0.449603
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.50277
Iter 10/10: OSS cache speed: 0.500872
Iter 10/10: ladvise speed: 0.3979
Average uncached read: .42
Average speedup with OSS cached read:  .45 = +7%
Average speedup with ladvise willread:  .46 = +9%
Speedup with OSS cached read less than 20%,  got 7%. Skipping ladvise willread check.
fail_loc=0