== sanity test 255a: check 'lfs ladvise -a willread' ===== 20:49:28 (1768009768)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 6.38027 s, 16.4 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-ffff9e41e0153000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 1.75128
Iter 1/10: OSS cache speed: 2.26469
Iter 1/10: ladvise speed: 2.44498
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 2.28442
Iter 2/10: OSS cache speed: 2.75378
Iter 2/10: ladvise speed: 2.60116
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 2.39859
Iter 3/10: OSS cache speed: 2.67592
Iter 3/10: ladvise speed: 2.32929
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 2.23468
Iter 4/10: OSS cache speed: 2.50959
Iter 4/10: ladvise speed: 2.58528
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 2.2424
Iter 5/10: OSS cache speed: 2.54345
Iter 5/10: ladvise speed: 2.44129
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 2.29939
Iter 6/10: OSS cache speed: 2.36657
Iter 6/10: ladvise speed: 2.39094
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 2.30221
Iter 7/10: OSS cache speed: 2.56807
Iter 7/10: ladvise speed: 2.44002
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 2.3237
Iter 8/10: OSS cache speed: 2.53349
Iter 8/10: ladvise speed: 2.54087
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 2.37883
Iter 9/10: OSS cache speed: 2.46971
Iter 9/10: ladvise speed: 2.47296
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 2.26957
Iter 10/10: OSS cache speed: 2.52493
Iter 10/10: ladvise speed: 2.5213
Average uncached read: 2.24
Average speedup with OSS cached read:  2.52 = +12%
Average speedup with ladvise willread:  2.47 = +10%
Speedup with OSS cached read less than 20%,  got 12%. Skipping ladvise willread check.
fail_loc=0