== sanity test 255a: check 'lfs ladvise -a willread' ===== 12:49:40 (1787849380)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 13.0539 s, 8.0 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-ffff8d1a904a9800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.372313
Iter 1/10: OSS cache speed: 0.333752
Iter 1/10: ladvise speed: 0.424348
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.400006
Iter 2/10: OSS cache speed: 0.456062
Iter 2/10: ladvise speed: 0.430502
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.438588
Iter 3/10: OSS cache speed: 0.455793
Iter 3/10: ladvise speed: 0.429148
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.413003
Iter 4/10: OSS cache speed: 0.444
Iter 4/10: ladvise speed: 0.380836
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.434163
Iter 5/10: OSS cache speed: 0.447751
Iter 5/10: ladvise speed: 0.500527
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.413849
Iter 6/10: OSS cache speed: 0.427934
Iter 6/10: ladvise speed: 0.422468
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.388344
Iter 7/10: OSS cache speed: 0.443976
Iter 7/10: ladvise speed: 0.342249
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.374385
Iter 8/10: OSS cache speed: 0.451084
Iter 8/10: ladvise speed: 0.463204
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.399564
Iter 9/10: OSS cache speed: 0.489141
Iter 9/10: ladvise speed: 0.350772
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.365606
Iter 10/10: OSS cache speed: 0.482091
Iter 10/10: ladvise speed: 0.441792
Average uncached read: .39
Average speedup with OSS cached read:  .44 = +12%
Average speedup with ladvise willread:  .41 = +5%
Speedup with OSS cached read less than 20%,  got 12%. Skipping ladvise willread check.
fail_loc=0