== sanity test 255a: check 'lfs ladvise -a willread' ===== 06:44:03 (1778928243)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 6.42409 s, 16.3 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-ffff8d0e84f65800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.655714
Iter 1/10: OSS cache speed: 0.902627
Iter 1/10: ladvise speed: 1.08336
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 1.03469
Iter 2/10: OSS cache speed: 1.49206
Iter 2/10: ladvise speed: 1.45242
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 1.44137
Iter 3/10: OSS cache speed: 1.62799
Iter 3/10: ladvise speed: 1.28307
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 1.37818
Iter 4/10: OSS cache speed: 1.57483
Iter 4/10: ladvise speed: 1.69186
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 2.00424
Iter 5/10: OSS cache speed: 2.35279
Iter 5/10: ladvise speed: 2.34247
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 2.10073
Iter 6/10: OSS cache speed: 2.24214
Iter 6/10: ladvise speed: 2.31102
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 2.3106
Iter 7/10: OSS cache speed: 2.53112
Iter 7/10: ladvise speed: 2.53287
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 2.47331
Iter 8/10: OSS cache speed: 2.74116
Iter 8/10: ladvise speed: 2.59637
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 2.47499
Iter 9/10: OSS cache speed: 2.63641
Iter 9/10: ladvise speed: 2.35008
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 2.18251
Iter 10/10: OSS cache speed: 2.46856
Iter 10/10: ladvise speed: 2.43334
Average uncached read: 1.80
Average speedup with OSS cached read:  2.05 = +13%
Average speedup with ladvise willread:  2.00 = +11%
Speedup with OSS cached read less than 20%,  got 13%. Skipping ladvise willread check.
fail_loc=0