== sanity test 255a: check 'lfs ladvise -a willread' ===== 05:38:19 (1734431899)
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 4.40614 s, 23.8 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-ffff8801369bd000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.903163
Iter 1/10: OSS cache speed: 1.01949
Iter 1/10: ladvise speed: 1.25143
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 1.27908
Iter 2/10: OSS cache speed: 1.314
Iter 2/10: ladvise speed: 1.62937
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 1.25618
Iter 3/10: OSS cache speed: 1.36087
Iter 3/10: ladvise speed: 0.955992
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 1.00641
Iter 4/10: OSS cache speed: 1.13742
Iter 4/10: ladvise speed: 1.28854
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 1.62191
Iter 5/10: OSS cache speed: 1.87088
Iter 5/10: ladvise speed: 1.95425
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 1.89962
Iter 6/10: OSS cache speed: 2.16388
Iter 6/10: ladvise speed: 2.37016
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 2.3268
Iter 7/10: OSS cache speed: 2.68668
Iter 7/10: ladvise speed: 2.57402
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 2.40415
Iter 8/10: OSS cache speed: 2.59387
Iter 8/10: ladvise speed: 2.43687
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 2.65509
Iter 9/10: OSS cache speed: 2.30443
Iter 9/10: ladvise speed: 2.4292
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 2.47574
Iter 10/10: OSS cache speed: 2.38636
Iter 10/10: ladvise speed: 2.347
Average uncached read: 1.78
Average speedup with OSS cached read:  1.88 = +5%
Average speedup with ladvise willread:  1.92 = +7%
Speedup with OSS cached read less than 20%,  got 5%. Skipping ladvise willread check.
fail_loc=0