== sanity test 255a: check 'lfs ladvise -a willread' ===== 13:45:46 (1733165146)
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 2.93775 s, 35.7 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-ffff8800b580a800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 2.60353
Iter 1/10: OSS cache speed: 2.46307
Iter 1/10: ladvise speed: 2.06489
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 1.96817
Iter 2/10: OSS cache speed: 1.95011
Iter 2/10: ladvise speed: 2.14195
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 2.16678
Iter 3/10: OSS cache speed: 2.32014
Iter 3/10: ladvise speed: 2.62778
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 2.74579
Iter 4/10: OSS cache speed: 2.48802
Iter 4/10: ladvise speed: 2.78385
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 2.54294
Iter 5/10: OSS cache speed: 2.56638
Iter 5/10: ladvise speed: 2.59289
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 2.59149
Iter 6/10: OSS cache speed: 2.47364
Iter 6/10: ladvise speed: 2.44581
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 2.73063
Iter 7/10: OSS cache speed: 2.58473
Iter 7/10: ladvise speed: 2.77736
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 2.51679
Iter 8/10: OSS cache speed: 2.54198
Iter 8/10: ladvise speed: 2.50931
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 2.50577
Iter 9/10: OSS cache speed: 2.48222
Iter 9/10: ladvise speed: 2.58927
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 2.49751
Iter 10/10: OSS cache speed: 2.55994
Iter 10/10: ladvise speed: 2.70945
Average uncached read: 2.48
Average speedup with OSS cached read:  2.44 = +-1%
Average speedup with ladvise willread:  2.52 = +1%
Speedup with OSS cached read less than 20%,  got -1%. Skipping ladvise willread check.
fail_loc=0