perf jevents: If the long_desc and desc are identical then drop the long_desc

If the short and long descriptions are the same then save space and
don't store both of them. When storing the desc in the perf_pmu_alias,
don't duplicate the desc into the long_desc.

By avoiding storing the duplicate the size of the events string in the
binary on x86 is reduced by 29,840 bytes.

Fix tests that expect a duplicated description.

Signed-off-by: Ian Rogers <irogers@google.com>
Link: https://lore.kernel.org/r/20250710235126.1086011-9-irogers@google.com
Signed-off-by: Namhyung Kim <namhyung@kernel.org>

1 files changed, 0 insertions, 22 deletions

diff --git a/tools/perf/tests/pmu-events.c b/tools/perf/tests/pmu-events.c
index 8bbe0516ecc0..95fd9f671a22 100644
--- a/tools/perf/tests/pmu-events.c
+++ b/tools/perf/tests/pmu-events.c
@@ -53,7 +53,6 @@ static const struct perf_pmu_test_event bp_l1_btb_correct = {
 		.topic = "branch",
 	},
 	.alias_str = "event=0x8a",
-	.alias_long_desc = "L1 BTB Correction",
 };
 
 static const struct perf_pmu_test_event bp_l2_btb_correct = {
@@ -65,7 +64,6 @@ static const struct perf_pmu_test_event bp_l2_btb_correct = {
 		.topic = "branch",
 	},
 	.alias_str = "event=0x8b",
-	.alias_long_desc = "L2 BTB Correction",
 };
 
 static const struct perf_pmu_test_event segment_reg_loads_any = {
@@ -77,7 +75,6 @@ static const struct perf_pmu_test_event segment_reg_loads_any = {
 		.topic = "other",
 	},
 	.alias_str = "event=0x6,period=0x30d40,umask=0x80",
-	.alias_long_desc = "Number of segment register loads",
 };
 
 static const struct perf_pmu_test_event dispatch_blocked_any = {
@@ -89,7 +86,6 @@ static const struct perf_pmu_test_event dispatch_blocked_any = {
 		.topic = "other",
 	},
 	.alias_str = "event=0x9,period=0x30d40,umask=0x20",
-	.alias_long_desc = "Memory cluster signals to block micro-op dispatch for any reason",
 };
 
 static const struct perf_pmu_test_event eist_trans = {
@@ -101,7 +97,6 @@ static const struct perf_pmu_test_event eist_trans = {
 		.topic = "other",
 	},
 	.alias_str = "event=0x3a,period=0x30d40",
-	.alias_long_desc = "Number of Enhanced Intel SpeedStep(R) Technology (EIST) transitions",
 };
 
 static const struct perf_pmu_test_event l3_cache_rd = {
@@ -133,11 +128,9 @@ static const struct perf_pmu_test_event uncore_hisi_ddrc_flux_wcmd = {
 		.event = "event=2",
 		.desc = "DDRC write commands",
 		.topic = "uncore",
-		.long_desc = "DDRC write commands",
 		.pmu = "hisi_sccl,ddrc",
 	},
 	.alias_str = "event=0x2",
-	.alias_long_desc = "DDRC write commands",
 	.matching_pmu = "hisi_sccl1_ddrc2",
 };
 
@@ -147,11 +140,9 @@ static const struct perf_pmu_test_event unc_cbo_xsnp_response_miss_eviction = {
 		.event = "event=0x22,umask=0x81",
 		.desc = "A cross-core snoop resulted from L3 Eviction which misses in some processor core",
 		.topic = "uncore",
-		.long_desc = "A cross-core snoop resulted from L3 Eviction which misses in some processor core",
 		.pmu = "uncore_cbox",
 	},
 	.alias_str = "event=0x22,umask=0x81",
-	.alias_long_desc = "A cross-core snoop resulted from L3 Eviction which misses in some processor core",
 	.matching_pmu = "uncore_cbox_0",
 };
 
@@ -161,11 +152,9 @@ static const struct perf_pmu_test_event uncore_hyphen = {
 		.event = "event=0xe0",
 		.desc = "UNC_CBO_HYPHEN",
 		.topic = "uncore",
-		.long_desc = "UNC_CBO_HYPHEN",
 		.pmu = "uncore_cbox",
 	},
 	.alias_str = "event=0xe0",
-	.alias_long_desc = "UNC_CBO_HYPHEN",
 	.matching_pmu = "uncore_cbox_0",
 };
 
@@ -175,11 +164,9 @@ static const struct perf_pmu_test_event uncore_two_hyph = {
 		.event = "event=0xc0",
 		.desc = "UNC_CBO_TWO_HYPH",
 		.topic = "uncore",
-		.long_desc = "UNC_CBO_TWO_HYPH",
 		.pmu = "uncore_cbox",
 	},
 	.alias_str = "event=0xc0",
-	.alias_long_desc = "UNC_CBO_TWO_HYPH",
 	.matching_pmu = "uncore_cbox_0",
 };
 
@@ -189,11 +176,9 @@ static const struct perf_pmu_test_event uncore_hisi_l3c_rd_hit_cpipe = {
 		.event = "event=7",
 		.desc = "Total read hits",
 		.topic = "uncore",
-		.long_desc = "Total read hits",
 		.pmu = "hisi_sccl,l3c",
 	},
 	.alias_str = "event=0x7",
-	.alias_long_desc = "Total read hits",
 	.matching_pmu = "hisi_sccl3_l3c7",
 };
 
@@ -203,11 +188,9 @@ static const struct perf_pmu_test_event uncore_imc_free_running_cache_miss = {
 		.event = "event=0x12",
 		.desc = "Total cache misses",
 		.topic = "uncore",
-		.long_desc = "Total cache misses",
 		.pmu = "uncore_imc_free_running",
 	},
 	.alias_str = "event=0x12",
-	.alias_long_desc = "Total cache misses",
 	.matching_pmu = "uncore_imc_free_running_0",
 };
 
@@ -217,11 +200,9 @@ static const struct perf_pmu_test_event uncore_imc_cache_hits = {
 		.event = "event=0x34",
 		.desc = "Total cache hits",
 		.topic = "uncore",
-		.long_desc = "Total cache hits",
 		.pmu = "uncore_imc",
 	},
 	.alias_str = "event=0x34",
-	.alias_long_desc = "Total cache hits",
 	.matching_pmu = "uncore_imc_0",
 };
 
@@ -246,7 +227,6 @@ static const struct perf_pmu_test_event sys_ddr_pmu_write_cycles = {
 		.compat = "v8",
 	},
 	.alias_str = "event=0x2b",
-	.alias_long_desc = "ddr write-cycles event",
 	.matching_pmu = "uncore_sys_ddr_pmu0",
 };
 
@@ -260,7 +240,6 @@ static const struct perf_pmu_test_event sys_ccn_pmu_read_cycles = {
 		.compat = "0x01",
 	},
 	.alias_str = "config=0x2c",
-	.alias_long_desc = "ccn read-cycles event",
 	.matching_pmu = "uncore_sys_ccn_pmu4",
 };
 
@@ -274,7 +253,6 @@ static const struct perf_pmu_test_event sys_cmn_pmu_hnf_cache_miss = {
 		.compat = "(434|436|43c|43a).*",
 	},
 	.alias_str = "eventid=0x1,type=0x5",
-	.alias_long_desc = "Counts total cache misses in first lookup result (high priority)",
 	.matching_pmu = "uncore_sys_cmn_pmu0",
 };