X-Git-Url: http://git.liburcu.org/?a=blobdiff_plain;f=README;h=8c5dd46435ba396fb7fdc50fe6e25f67c963b075;hb=refs%2Fheads%2Fstable-2.2;hp=1bcd5b2d69bd9109bdb38236063470294b3f3d7d;hpb=3a523f5b6b4f8ca82412cb45f2d2ad9c44e7d249;p=lttng-modules.git diff --git a/README b/README index 1bcd5b2d..8c5dd464 100644 --- a/README +++ b/README @@ -1,9 +1,9 @@ -LTTng 2.0 modules +LTTng 2.x modules Mathieu Desnoyers -April 6, 2012 +March 29, 2013 -LTTng 2.0 kernel modules build against a vanilla or distribution kernel, without +LTTng 2.x kernel modules build against a vanilla or distribution kernel, without need for additional patches. Other features: - Produces CTF (Common Trace Format) natively, @@ -38,16 +38,17 @@ http://lttng.org/lttng2.0 So far, it has been tested on vanilla Linux kernels 2.6.38, 2.6.39, 3.0, 3.1, 3.2, 3.3 (on x86 32/64-bit, and powerpc 32-bit at the moment, build -tested on ARM). Kernels 2.6.32 to 2.6.34 need up to 3 patches applied -(refer to linux-patches within the lttng-modules tree). It should work -fine with newer kernels and other architectures, but expect build issues -with kernels older than 2.6.36. The clock source currently used is the -standard gettimeofday (slower, less scalable and less precise than the -LTTng 0.x clocks). Support for LTTng 0.x clocks will be added back soon -into LTTng 2.0. Please note that lttng-modules 2.0 can build on a Linux -kernel patched with the LTTng 0.x patchset, but the lttng-modules 2.0 -replace the lttng-modules 0.x, so both tracers cannot be installed at -the same time for a given kernel version. +tested on ARM), 3.4, 3.5, 3.8, 3.9-rc on x86 64-bit. Kernels 2.6.32 to +2.6.34 need up to 3 patches applied (refer to linux-patches within the +lttng-modules tree). It should work fine with newer kernels and other +architectures, but expect build issues with kernels older than 2.6.36. +The clock source currently used is the standard gettimeofday (slower, +less scalable and less precise than the LTTng 0.x clocks). Support for +LTTng 0.x clocks will be added back soon into LTTng 2.0. Please note +that lttng-modules 2.x can build on a Linux kernel patched with the +LTTng 0.x patchset, but the lttng-modules 2.x replace the lttng-modules +0.x, so both tracers cannot be installed at the same time for a given +kernel version. * Kernel config options required @@ -58,7 +59,7 @@ CONFIG_KALLSYMS: required * See wrapper/ files. This is necessary until the few required missing symbols are exported to GPL modules from mainline. CONFIG_HIGH_RES_TIMERS: required - * Needed for LTTng 2.0 clock source. + * Needed for LTTng 2.x clock source. CONFIG_TRACEPOINTS: required kernel tracepoint instrumentation * Enabled as side-effect of any of the perf/ftrace/blktrace