== sanity test 834: mmap readahead for madvise with MADV_HUGEPAGE ========================================================== 21:16:11 (1763345771)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 9.21306 s, 11.4 MB/s
llite.lustre-ffffa0b88b5f4000.read_ahead_stats=clear
llite.lustre-ffffa0b88b5f4000.read_ahead_stats=
snapshot_time             1763345800.078576006 secs.nsecs
start_time                1763345784.803978627 secs.nsecs
elapsed_time              15.274597379 secs.nsecs
hits                      25370 samples [pages]
misses                    230 samples [pages]
zero_size_window          93 samples [pages]
failed_to_reach_end       1 samples [pages]
failed_to_fast_read       230 samples [pages]
mmap_range_read           225 samples [pages]
readahead_pages           225 samples [pages] 8 128 25370
/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=226257: Sun Nov 16 21:27:30 2025
  read: IOPS=7, BW=8145KiB/s (8340kB/s)(5120MiB/643726msec)
    clat (msec): min=17, max=334, avg=125.30, stdev=38.77
     lat (msec): min=17, max=334, avg=125.31, stdev=38.77
    clat percentiles (msec):
     |  1.00th=[   71],  5.00th=[   80], 10.00th=[   85], 20.00th=[   92],
     | 30.00th=[  100], 40.00th=[  108], 50.00th=[  117], 60.00th=[  128],
     | 70.00th=[  140], 80.00th=[  157], 90.00th=[  180], 95.00th=[  201],
     | 99.00th=[  241], 99.50th=[  257], 99.90th=[  300], 99.95th=[  309],
     | 99.99th=[  334]
   bw (  KiB/s): min= 3886, max=14336, per=100.00%, avg=8182.56, stdev=2051.63, samples=1270
   iops        : min=    3, max=   14, avg= 7.32, stdev= 2.07, samples=1270
  lat (msec)   : 20=0.06%, 50=0.21%, 100=30.12%, 250=68.95%, 500=0.66%
  cpu          : usr=0.42%, sys=35.51%, ctx=25439, majf=7715, minf=1303274
  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=8145KiB/s (8340kB/s), 8145KiB/s-8145KiB/s (8340kB/s-8340kB/s), io=5120MiB (5369MB), run=643726-643726msec