== sanity test 255a: check 'lfs ladvise -a willread' ===== 17:21:31 (1786483291)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 6.43285 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-ffff8fd14a9e0800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.842389
Iter 1/10: OSS cache speed: 0.880184
Iter 1/10: ladvise speed: 0.84811
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.951097
Iter 2/10: OSS cache speed: 1.10171
Iter 2/10: ladvise speed: 1.17531
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.97878
Iter 3/10: OSS cache speed: 1.0651
Iter 3/10: ladvise speed: 1.05941
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.549962
Iter 4/10: OSS cache speed: 0.342123
Iter 4/10: ladvise speed: 0.381678
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.460859
Iter 5/10: OSS cache speed: 0.451323
Iter 5/10: ladvise speed: 0.471778
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.58498
Iter 6/10: OSS cache speed: 0.582489
Iter 6/10: ladvise speed: 0.848574
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 2.02854
Iter 7/10: OSS cache speed: 2.00348
Iter 7/10: ladvise speed: 1.95746
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 1.96263
Iter 8/10: OSS cache speed: 2.00163
Iter 8/10: ladvise speed: 1.95482
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 2.06059
Iter 9/10: OSS cache speed: 2.0135
Iter 9/10: ladvise speed: 1.92599
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 1.98519
Iter 10/10: OSS cache speed: 2.13206
Iter 10/10: ladvise speed: 2.05678
Average uncached read: 1.24
Average speedup with OSS cached read:  1.25 = +0%
Average speedup with ladvise willread:  1.26 = +1%
Speedup with OSS cached read less than 20%,  got 0%. Skipping ladvise willread check.
fail_loc=0