== sanity test 834: mmap readahead for madvise with MADV_HUGEPAGE ========================================================== 00:16:39 (1764738999)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 6.25168 s, 16.8 MB/s
llite.lustre-ffff92951736e800.read_ahead_stats=clear
llite.lustre-ffff92951736e800.read_ahead_stats=
snapshot_time             1764739015.766797860 secs.nsecs
start_time                1764739007.828327678 secs.nsecs
elapsed_time              7.938470182 secs.nsecs
hits                      25372 samples [pages]
misses                    228 samples [pages]
failed_grab_cache_page    223 samples [pages]
zero_size_window          6 samples [pages]
failed_to_fast_read       228 samples [pages]
mmap_range_read           223 samples [pages]
readahead_pages           224 samples [pages] 8 256 25372
/usr/bin/fio
thp                     : Memory Advise Huge Page
read_test: (g=0): rw=read, bs=(R) 1024KiB-1024KiB, (W) 1024KiB-1024KiB, (T) 1024KiB-1024KiB, ioengine=mmap, iodepth=1
fio-3.19
Starting 1 process

read_test: (groupid=0, jobs=1): err= 0: pid=225079: Wed Dec  3 00:22:52 2025
  read: IOPS=14, BW=14.5MiB/s (15.2MB/s)(5120MiB/353178msec)
    clat (msec): min=14, max=243, avg=68.81, stdev=30.08
     lat (msec): min=14, max=243, avg=68.81, stdev=30.08
    clat percentiles (msec):
     |  1.00th=[   39],  5.00th=[   44], 10.00th=[   46], 20.00th=[   49],
     | 30.00th=[   52], 40.00th=[   54], 50.00th=[   57], 60.00th=[   60],
     | 70.00th=[   66], 80.00th=[   99], 90.00th=[  114], 95.00th=[  126],
     | 99.00th=[  182], 99.50th=[  201], 99.90th=[  228], 99.95th=[  236],
     | 99.99th=[  245]
   bw (  KiB/s): min= 4096, max=24576, per=100.00%, avg=14885.13, stdev=5319.04, samples=704
   iops        : min=    4, max=   24, avg=14.52, stdev= 5.19, samples=704
  lat (msec)   : 20=0.04%, 50=25.29%, 100=56.37%, 250=18.30%
  cpu          : usr=0.69%, sys=86.61%, ctx=16481, majf=5100, minf=1305891
  IO depths    : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0%
     submit    : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0%
     complete  : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0%
     issued rwts: total=5120,0,0,0 short=0,0,0,0 dropped=0,0,0,0
     latency   : target=0, window=0, percentile=100.00%, depth=1

Run status group 0 (all jobs):
   READ: bw=14.5MiB/s (15.2MB/s), 14.5MiB/s-14.5MiB/s (15.2MB/s-15.2MB/s), io=5120MiB (5369MB), run=353178-353178msec