== sanity test 255a: check 'lfs ladvise -a willread' ===== 14:01:01 (1788890461)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 5.85737 s, 17.9 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-ffff8b3210712800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 1.81091
Iter 1/10: OSS cache speed: 2.18031
Iter 1/10: ladvise speed: 2.29379
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 2.00573
Iter 2/10: OSS cache speed: 1.33625
Iter 2/10: ladvise speed: 2.25145
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.964684
Iter 3/10: OSS cache speed: 0.859135
Iter 3/10: ladvise speed: 1.00353
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.999316
Iter 4/10: OSS cache speed: 1.05244
Iter 4/10: ladvise speed: 1.2172
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 1.34841
Iter 5/10: OSS cache speed: 1.43078
Iter 5/10: ladvise speed: 1.69201
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 1.45272
Iter 6/10: OSS cache speed: 1.36347
Iter 6/10: ladvise speed: 1.41913
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 1.30969
Iter 7/10: OSS cache speed: 1.21569
Iter 7/10: ladvise speed: 1.35651
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 1.65653
Iter 8/10: OSS cache speed: 1.99173
Iter 8/10: ladvise speed: 2.13628
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 2.08937
Iter 9/10: OSS cache speed: 2.24034
Iter 9/10: ladvise speed: 2.28778
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 2.10573
Iter 10/10: OSS cache speed: 1.84166
Iter 10/10: ladvise speed: 2.25368
Average uncached read: 1.57
Average speedup with OSS cached read:  1.55 = +-1%
Average speedup with ladvise willread:  1.79 = +14%
Speedup with OSS cached read less than 20%,  got -1%. Skipping ladvise willread check.
fail_loc=0