== sanity test 255a: check 'lfs ladvise -a willread' ===== 16:28:20 (1746131300)
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 6.94628 s, 15.1 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-ffff8800b6e5a800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.579557
Iter 1/10: OSS cache speed: 0.64859
Iter 1/10: ladvise speed: 0.675826
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.583342
Iter 2/10: OSS cache speed: 0.574804
Iter 2/10: ladvise speed: 0.594847
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.543824
Iter 3/10: OSS cache speed: 0.580312
Iter 3/10: ladvise speed: 0.645142
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.617734
Iter 4/10: OSS cache speed: 0.692953
Iter 4/10: ladvise speed: 0.648203
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.545711
Iter 5/10: OSS cache speed: 0.660436
Iter 5/10: ladvise speed: 0.630323
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.552369
Iter 6/10: OSS cache speed: 0.589482
Iter 6/10: ladvise speed: 0.636382
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.568368
Iter 7/10: OSS cache speed: 0.618041
Iter 7/10: ladvise speed: 0.623425
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.539761
Iter 8/10: OSS cache speed: 0.571635
Iter 8/10: ladvise speed: 0.610555
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.589271
Iter 9/10: OSS cache speed: 0.654595
Iter 9/10: ladvise speed: 0.616938
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.544087
Iter 10/10: OSS cache speed: 0.575863
Iter 10/10: ladvise speed: 0.59286
Average uncached read: .56
Average speedup with OSS cached read:  .61 = +8%
Average speedup with ladvise willread:  .62 = +10%
Speedup with OSS cached read less than 20%,  got 8%. Skipping ladvise willread check.
fail_loc=0