diff options
Diffstat (limited to 'poky/meta/recipes-kernel/lttng/lttng-modules/0009-fix-tracepoint-Optimize-using-static_call-v5.10.patch')
| -rw-r--r-- | poky/meta/recipes-kernel/lttng/lttng-modules/0009-fix-tracepoint-Optimize-using-static_call-v5.10.patch | 155 |
1 files changed, 155 insertions, 0 deletions
diff --git a/poky/meta/recipes-kernel/lttng/lttng-modules/0009-fix-tracepoint-Optimize-using-static_call-v5.10.patch b/poky/meta/recipes-kernel/lttng/lttng-modules/0009-fix-tracepoint-Optimize-using-static_call-v5.10.patch new file mode 100644 index 0000000000..b942aa5c95 --- /dev/null +++ b/poky/meta/recipes-kernel/lttng/lttng-modules/0009-fix-tracepoint-Optimize-using-static_call-v5.10.patch @@ -0,0 +1,155 @@ +From c6b31b349fe901a8f586a66064f9e9b15449ac1c Mon Sep 17 00:00:00 2001 +From: Michael Jeanson <mjeanson@efficios.com> +Date: Mon, 26 Oct 2020 17:09:05 -0400 +Subject: [PATCH 09/16] fix: tracepoint: Optimize using static_call() (v5.10) + +See upstream commit : + + commit d25e37d89dd2f41d7acae0429039d2f0ae8b4a07 + Author: Steven Rostedt (VMware) <rostedt@goodmis.org> + Date: Tue Aug 18 15:57:52 2020 +0200 + + tracepoint: Optimize using static_call() + + Currently the tracepoint site will iterate a vector and issue indirect + calls to however many handlers are registered (ie. the vector is + long). + + Using static_call() it is possible to optimize this for the common + case of only having a single handler registered. In this case the + static_call() can directly call this handler. Otherwise, if the vector + is longer than 1, call a function that iterates the whole vector like + the current code. + +Upstream-Status: Backport + +Change-Id: I739dd84d62cc1a821b8bd8acff74fa29aa25d22f +Signed-off-by: Michael Jeanson <mjeanson@efficios.com> +Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com> +--- + lttng-statedump-impl.c | 44 ++++++++++++++++++++++++++++++++------- + probes/lttng.c | 7 +++++-- + tests/probes/lttng-test.c | 7 ++++++- + wrapper/tracepoint.h | 8 +++++++ + 4 files changed, 56 insertions(+), 10 deletions(-) + +diff --git a/lttng-statedump-impl.c b/lttng-statedump-impl.c +index 54a309d1..e0b19b42 100644 +--- a/lttng-statedump-impl.c ++++ b/lttng-statedump-impl.c +@@ -55,13 +55,43 @@ + #define LTTNG_INSTRUMENTATION + #include <instrumentation/events/lttng-module/lttng-statedump.h> + +-DEFINE_TRACE(lttng_statedump_block_device); +-DEFINE_TRACE(lttng_statedump_end); +-DEFINE_TRACE(lttng_statedump_interrupt); +-DEFINE_TRACE(lttng_statedump_file_descriptor); +-DEFINE_TRACE(lttng_statedump_start); +-DEFINE_TRACE(lttng_statedump_process_state); +-DEFINE_TRACE(lttng_statedump_network_interface); ++LTTNG_DEFINE_TRACE(lttng_statedump_block_device, ++ TP_PROTO(struct lttng_session *session, ++ dev_t dev, const char *diskname), ++ TP_ARGS(session, dev, diskname)); ++ ++LTTNG_DEFINE_TRACE(lttng_statedump_end, ++ TP_PROTO(struct lttng_session *session), ++ TP_ARGS(session)); ++ ++LTTNG_DEFINE_TRACE(lttng_statedump_interrupt, ++ TP_PROTO(struct lttng_session *session, ++ unsigned int irq, const char *chip_name, ++ struct irqaction *action), ++ TP_ARGS(session, irq, chip_name, action)); ++ ++LTTNG_DEFINE_TRACE(lttng_statedump_file_descriptor, ++ TP_PROTO(struct lttng_session *session, ++ struct files_struct *files, ++ int fd, const char *filename, ++ unsigned int flags, fmode_t fmode), ++ TP_ARGS(session, files, fd, filename, flags, fmode)); ++ ++LTTNG_DEFINE_TRACE(lttng_statedump_start, ++ TP_PROTO(struct lttng_session *session), ++ TP_ARGS(session)); ++ ++LTTNG_DEFINE_TRACE(lttng_statedump_process_state, ++ TP_PROTO(struct lttng_session *session, ++ struct task_struct *p, ++ int type, int mode, int submode, int status, ++ struct files_struct *files), ++ TP_ARGS(session, p, type, mode, submode, status, files)); ++ ++LTTNG_DEFINE_TRACE(lttng_statedump_network_interface, ++ TP_PROTO(struct lttng_session *session, ++ struct net_device *dev, struct in_ifaddr *ifa), ++ TP_ARGS(session, dev, ifa)); + + struct lttng_fd_ctx { + char *page; +diff --git a/probes/lttng.c b/probes/lttng.c +index 05bc1388..7ddaa69f 100644 +--- a/probes/lttng.c ++++ b/probes/lttng.c +@@ -8,7 +8,7 @@ + */ + + #include <linux/module.h> +-#include <linux/tracepoint.h> ++#include <wrapper/tracepoint.h> + #include <linux/uaccess.h> + #include <linux/gfp.h> + #include <linux/fs.h> +@@ -32,7 +32,10 @@ + #define LTTNG_LOGGER_COUNT_MAX 1024 + #define LTTNG_LOGGER_FILE "lttng-logger" + +-DEFINE_TRACE(lttng_logger); ++LTTNG_DEFINE_TRACE(lttng_logger, ++ PARAMS(const char __user *text, size_t len), ++ PARAMS(text, len) ++); + + static struct proc_dir_entry *lttng_logger_dentry; + +diff --git a/tests/probes/lttng-test.c b/tests/probes/lttng-test.c +index c728bed5..8f2d3feb 100644 +--- a/tests/probes/lttng-test.c ++++ b/tests/probes/lttng-test.c +@@ -26,7 +26,12 @@ + #define LTTNG_INSTRUMENTATION + #include <instrumentation/events/lttng-module/lttng-test.h> + +-DEFINE_TRACE(lttng_test_filter_event); ++LTTNG_DEFINE_TRACE(lttng_test_filter_event, ++ PARAMS(int anint, int netint, long *values, ++ char *text, size_t textlen, ++ char *etext, uint32_t * net_values), ++ PARAMS(anint, netint, values, text, textlen, etext, net_values) ++); + + #define LTTNG_TEST_FILTER_EVENT_FILE "lttng-test-filter-event" + +diff --git a/wrapper/tracepoint.h b/wrapper/tracepoint.h +index 3883e11a..758038b6 100644 +--- a/wrapper/tracepoint.h ++++ b/wrapper/tracepoint.h +@@ -20,6 +20,14 @@ + + #endif + ++#if (LINUX_VERSION_CODE >= KERNEL_VERSION(5,10,0)) ++#define LTTNG_DEFINE_TRACE(name, proto, args) \ ++ DEFINE_TRACE(name, PARAMS(proto), PARAMS(args)) ++#else ++#define LTTNG_DEFINE_TRACE(name, proto, args) \ ++ DEFINE_TRACE(name) ++#endif ++ + #ifndef HAVE_KABI_2635_TRACEPOINT + + #define kabi_2635_tracepoint_probe_register tracepoint_probe_register +-- +2.25.1 + |