RHEL Kernel Performance Optimization, Characterization ... - Red Hat

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Alt Sysrq Tbash R current 0 1609 1606(NOTLB)Call Trace:[] snprintf [kernel] 0x27 (0xdb3c5e90)[] call_console_drivers [kernel] 0x63 (0xdb3c5eb4)[] printk [kernel] 0x153 (0xdb3c5eec)[] printk [kernel] 0x153 (0xdb3c5f00)[] show_trace [kernel] 0xd9 (0xdb3c5f0c)[] show_trace [kernel] 0xd9 (0xdb3c5f14)[] show_state [kernel] 0x62 (0xdb3c5f24)[] __handle_sysrq_nolock [kernel] 0x7a (0xdb3c5f38)[] handle_sysrq [kernel] 0x5d (0xdb3c5f58)[] write_sysrq_trigger [kernel] 0x53 (0xdb3c5f7c)[] sys_write [kernel] 0x97 (0xdb3c5f94)* logged in /var/log/messages
Alt Sysrq W and PSysRq : Show CPUsCPU0:ffffffff8047ef48 0000000000000000 ffffffff80437f10 ffffffff8019378b0000000000000000 0000000000000000 0000000000000000 ffffffff801937baffffffff8019378b ffffffff80022b27 ffffffff800551bf 0000000000090000Call Trace:[] show_trace+0x34/0x47[] _show_stack+0xd9/0xe8[] showacpu+0x2f/0x3b[] smp_call_function_interrupt+0x57/0x75[] call_function_interrupt+0x66/0x6c[] unix_poll+0x0/0x96[] mwait_idle+0x36/0x4a[] cpu_idle+0x95/0xb8[] start_kernel+0x225/0x22a[] _sinittext+0x25b/0x262
Page 1 and 2:
RHEL Kernel Performance Optimizatio
Page 3 and 4:
Section 1 System Overview Proces
Page 5 and 6:
Processor typesUniProcessorSymmet
Page 7 and 8: AMD64 System Numa Memory LayoutS1S2
Page 9: Physical Memory Supported/TestedRHE
Page 13 and 14: IncomesExpendituresDonkey owned 0.7
Page 15 and 16: Perzone page lists Active List
Page 17 and 18: Per NUMANode ResourcesMemory zone
Page 19 and 20: Virtual Address Space Maps 32bit
Page 21 and 22: Linux 32bit Address Space(Hugemem
Page 23 and 24: Memory Pressure32 bitDMA Normal H
Page 25 and 26: User Memory PressureAnonymous/pagec
Page 27 and 28: PageCache/Anonymous memory split(Co
Page 29 and 30: 64bit Memory ReclamationRAMKernel
Page 31 and 32: Per Node/Zone Paging DynamicsUser A
Page 33 and 34: Buffered file system writeMemorycop
Page 35 and 36: Section 2 Analyzing System Perfo
Page 37 and 38: Red Hat Top ToolsCPU ToolsMemory To
Page 39 and 40: vmstat(paging vs swapping)vmstat 10
Page 41 and 42: iostat x of same IOzone EXT3 file
Page 43 and 44: free/numastat - memory allocation[r
Page 45 and 46: pstreeinit ─┬─/usr/bin/sealer
Page 47 and 48: The /proc filesystem /proc●meminf
Page 49 and 50: proc/slabinfoslabinfo version: 2
Page 51 and 52: 32bit /proc//maps[root@dhcp8336
Page 53 and 54: proc/vmstat(RHEL4/RHEL5)cat /proc/v
Page 55 and 56: Alt Sysrq M - RHEL3/NUMASysRq : Sho
Page 57: Alt Sysrq M - RHEL4 & 5/NUMAFree pa
Page 61 and 62: oprofile - opcontrol and opreport c
Page 63 and 64: Profiling Tools: SystemTapTechnolog
Page 65 and 66: New Tuning Tools w/ RH MRGMRG Tunin
Page 67 and 68: Tuning how to set kernel paramet
Page 69 and 70: OOM kills - swap space exhaustion(R
Page 71 and 72: OOM kills - lowmem consumption(RHEL
Page 73 and 74: Eliminating OOMkillsRHEL3●/proc/s
Page 75 and 76: Performance Tuning - (RHEL3) /proc/
Page 77 and 78: RHEL3 /proc/sys/vm/pagecachepagecac
Page 79 and 80: Performance Tuning - (RHEL4 and RHE
Page 81 and 82: RHEL4&5 /proc/sys/vm/min_free_kbyte
Page 83 and 84: RHEL4&5 /proc/sys/vm/dirty_ratioAbs
Page 85 and 86: dirty_ratio and dirty_background_ra
Page 87 and 88: Pagecache TuningFilesystem/pagecach
Page 89 and 90: (Hint)flushing the slabcache[tmp]#
Page 91 and 92: x86●RHEL4 kernel selectionStandar
Page 93 and 94: Problem 16GB x86 running SMP ker
Page 95 and 96: Linux at 16cpus quadcore and b
Page 97 and 98: Asynchronous I/O CharacteristicsR4
Page 99 and 100: Disk IO tuning RHEL4/5RHEL4/5 -
Page 101 and 102: Optimizing File System PerformanceU
Page 103 and 104: McCalpin Streams Copy Bandwidth (1,
Page 105 and 106: RHEL4&5 NUMAstat and NUMActlEXAMPLE
Page 107 and 108: RHEL5.2 CPUspeed and performance:En
Page 109 and 110:
Effects of CPUspeed with RHEL5.2 Vi
Page 111 and 112:
EXT3, GFS, NFS Iozone w/ DirectIORH
Page 113 and 114:
Using HugeTLBfs w/ DatabasesRHEL4+5
Page 115 and 116:
Tuning Network Apps Messages/sec Di
Page 117 and 118:
RT Peformance of Network Apps Messa
Page 119 and 120:
General Performance Tuning Guidelin
Page 121 and 122:
Linux Performance Tuning References
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RHEL Kernel Performance Optimization, Characterization ... - Red Hat

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