== sanity test 255a: check 'lfs ladvise -a willread' ===== 01:41:16 (1789710076)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 6.31099 s, 16.6 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-ffff9ee60614d000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 2.43039
Iter 1/10: OSS cache speed: 2.70035
Iter 1/10: ladvise speed: 2.62056
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 2.38609
Iter 2/10: OSS cache speed: 2.56487
Iter 2/10: ladvise speed: 2.52414
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 2.42501
Iter 3/10: OSS cache speed: 2.61617
Iter 3/10: ladvise speed: 2.67316
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 2.45624
Iter 4/10: OSS cache speed: 2.6487
Iter 4/10: ladvise speed: 2.66365
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 2.49984
Iter 5/10: OSS cache speed: 2.66823
Iter 5/10: ladvise speed: 2.68864
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 1.60802
Iter 6/10: OSS cache speed: 1.50325
Iter 6/10: ladvise speed: 1.71849
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 2.40931
Iter 7/10: OSS cache speed: 2.68729
Iter 7/10: ladvise speed: 2.58874
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 2.37482
Iter 8/10: OSS cache speed: 2.63986
Iter 8/10: ladvise speed: 2.64978
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 2.31489
Iter 9/10: OSS cache speed: 2.56633
Iter 9/10: ladvise speed: 2.74233
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 2.51341
Iter 10/10: OSS cache speed: 2.75084
Iter 10/10: ladvise speed: 2.75883
Average uncached read: 2.34
Average speedup with OSS cached read:  2.53 = +8%
Average speedup with ladvise willread:  2.56 = +9%
Speedup with OSS cached read less than 20%,  got 8%. Skipping ladvise willread check.
fail_loc=0