== sanity test 255a: check 'lfs ladvise -a willread' ===== 11:26:07 (1722785167)
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 2.92617 s, 35.8 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-ffff8800b660c800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 1.82688
Iter 1/10: OSS cache speed: 1.98683
Iter 1/10: ladvise speed: 2.01033
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 1.46716
Iter 2/10: OSS cache speed: 1.39816
Iter 2/10: ladvise speed: 1.78646
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 1.86856
Iter 3/10: OSS cache speed: 2.58442
Iter 3/10: ladvise speed: 2.6331
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 2.83737
Iter 4/10: OSS cache speed: 3.06834
Iter 4/10: ladvise speed: 3.10526
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 3.24272
Iter 5/10: OSS cache speed: 3.5671
Iter 5/10: ladvise speed: 3.20459
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 2.94018
Iter 6/10: OSS cache speed: 3.27932
Iter 6/10: ladvise speed: 3.25978
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 2.91184
Iter 7/10: OSS cache speed: 2.25228
Iter 7/10: ladvise speed: 2.98538
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 2.11803
Iter 8/10: OSS cache speed: 2.79623
Iter 8/10: ladvise speed: 3.15434
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 2.93337
Iter 9/10: OSS cache speed: 2.87415
Iter 9/10: ladvise speed: 3.03907
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 2.90074
Iter 10/10: OSS cache speed: 3.26221
Iter 10/10: ladvise speed: 3.32664
Average uncached read: 2.50
Average speedup with OSS cached read: 2.70 = +8.00%
Average speedup with ladvise willread: 2.85 = +14.00%
Speedup with OSS cached read less than 20%, got 8.00%. Skipping ladvise willread check.
fail_loc=0